Friesen Group
Quantum Computing and Condensed Matter Theory at UW–Madison

Publications

Google Scholar h-index = 53

  1. “g-factor theory of Si/SiGe quantum dots: spin-valley and giant renormalization effects,” Benjamin D. Woods, Merritt P. Losert, Robert Joynt, and Mark Friesen. Preprint
  2. “Omnidirectional shuttling to avoid valley excitations in Si/SiGe quantum wells,” Róbert Németh, Vatsal K. Bandaru, Pedro Alves, Merritt P. Losert, Emma Brann, Owen M. Eskandari, Hudaiba Soomro, Avani Vivrekar, M. A. Eriksson, and Mark Friesen. Preprint
  3. “BATIS: Bootstrapping, Autonomous Testing, and Initialization System for Quantum Dot Devices,” Tyler J. Kovach, Daniel Schug, M. A. Wolfe, E. R. MacQuarrie, Patrick J. Walsh, Jared Benson, Mark Friesen, M. A. Eriksson, and Justyna P. Zwolak. Preprint
  4. “On-chip cryogenic multiplexing of Si/SiGe quantum devices,” M. A. Wolfe, Thomas McJunkin, Daniel R. Ward, DeAnna Campbell, Mark Friesen, and M. A. Eriksson. Preprint
  5. “Single-shot latched readout of a quantum dot qubit using barrier gate pulsing,” Sanghyeok Park, Jared Benson, J. Corrigan, J. P. Dodson, S. N. Coppersmith, Mark Friesen, and M. A. Eriksson. Preprint
  6. “Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling,” Benjamin Harpt, J. Corrigan, Nathan Holman, Piotr Marciniec, D. Rosenberg, D. Yost, R. Das, Rusko Ruskov, Charles Tahan, William D. Oliver, R. McDermott, Mark Friesen, and M. A. Eriksson, npj Quantum Information 11, 5 (2025). Article
  7. “Atomistic compositional details and their importance for spin qubits in isotope-purified silicon-germanium quantum wells,” Jan Klos, Jan Tröger, Jens Keutgen, Merritt P. Losert, Helge Riemann, Nikolay V. Abrosimov, Joachim Knoch, Hartmut Bracht, Susan N. Coppersmith, Mark Friesen, Oana Cojocaru-Mirédin, Lars R. Schreiber, and Dominique Bougeard, Advanced Science 2024, 2407442 (2024). Article
  8. “Strategies for enhancing spin-shuttling fidelities in Si/SiGe quantum wells with random-alloy disorder,” Merritt P. Losert, Max Oberländer, Julian D. Teske, Mats Volmer, Lars R. Schreiber, Hendrik Bluhm, S. N. Coppersmith, and Mark Friesen, PRX Quantum 5, 040322 (2024). Article
  9. “Operating semiconductor quantum processors with hopping spins,” Chien-An Wang, Valentin John, Hanifa Tidjani, Cécile X. Yu, Alexander Ivlev, Corentin Déprez, Floor van Riggelen-Doelman, Benjamin D. Woods, Nico W. Hendrickx, Will I. L. Lawrie, Lucas E. A. Stehouwer, Stefan Oosterhout, Amir Sammak, Mark Friesen, Giordano Scappucci, Sander L. de Snoo, Maximilian Rimbach-Russ, Francesco Borsoi, and Menno Veldhorst, Science 385, 447 (2024). Article
  10. “Challenges in advancing our understanding of atomic-like quantum systems: Theory and experiment,” Adam Gali, André Schleife, Andreas J. Heinrich, Arne Laucht, Bruno Schuler, Chitraleema Chakraborty, Christopher P. Anderson, Corentin Déprez, Jeffrey McCallum, Lee C. Bassett, Mark Friesen, Michael E. Flatté, Peter Maurer, Susan N. Coppersmith, Tian Zhong, Vijaya Begum-Hudde, and Yuan Ping, MRS Bulletin 49, 256 (2024). Article
  11. “Control of threshold voltages in Si/Si0.7Ge0.3 quantum devices via optical illumination,” M. A. Wolfe, Brighton X. Coe, Justin S. Edwards, Tyler J. Kovach, Thomas McJunkin, Benjamin Harpt, D. E. Savage, M. G. Lagally, R. McDermott, Mark Friesen, Shimon Kolkowitz, and M. A. Eriksson, Phys. Rev. Applied 22, 034044 (2024). Article
  12. “Reducing strain fluctuations in quantum dot devices by gate-layer stacking,” Collin C. D. Frink, Benjamin D. Woods, Merritt P. Losert, E. R. MacQuarrie, M. A. Eriksson, and Mark Friesen. Preprint
  13. “Coupling conduction-band valleys in modulated SiGe heterostructures via shear strain,” Benjamin D. Woods, Hudaiba Soomro, E. S. Joseph, Collin C. D. Frink, Robert Joynt, M. A. Eriksson, and Mark Friesen, npj Quantum Inform. 10, 54 (2024). Article
  14. “Realizing Majorana Kramers pairs in two-channel InAs-Al nanowires with highly misaligned electric fields,” Benjamin D. Woods and Mark Friesen, Phys. Rev. B 108, 155142 (2023). Article
  15. “Practical Strategies for Enhancing the Valley Splitting in Si/SiGe Quantum Wells,” Merritt P. Losert, M. A. Eriksson, Robert Joynt, Rajib Rahman, Giordano Scappucci, Susan N. Coppersmith, and Mark Friesen, Phys. Rev. B 108, 125405 (2023). Article
  16. “Multielectron dots provide faster Rabi oscillations when the core electrons are strongly confined,” H. Ekmel Ercan, Christopher R. Anderson, S. N. Coppersmith, Mark Friesen, and Mark F. Gyure. Preprint
  17. “Spin-orbit enhancement in Si/SiGe heterostructures with oscillating Ge concentration,” Benjamin D. Woods, M. A. Eriksson, Robert Joynt, and Mark Friesen, Phys. Rev. B 107, 035418 (2023). Article
  18. “Sensitivity of quantum gate fidelity to laser phase and intensity noise,” X. Jiang, J. Scott, Mark Friesen, and M. Saffman, Phys. Rev. A 107, 042611 (2023). Article
  19. “Longitudinal coupling between a Si/SiGe double quantum dot and an off-chip TiN resonator,” J. Corrigan, Benjamin Harpt, Nathan Holman, Rusko Ruskov, Piotr Marciniec, D. Rosenberg, D. Yost, R. Das, William D. Oliver, R. McDermott, Charles Tahan, Mark Friesen, and M. A. Eriksson, Phys. Rev. Appl. 20, 064005 (2023). Article
  20. “SiGe quantum wells with oscillating Ge concentrations for quantum dot qubits,” Thomas McJunkin, Benjamin Harpt, Yi Feng, Merritt P. Losert, Rajib Rahman, J. P. Dodson, M. A. Wolfe, D. E. Savage, M. G. Lagally, S. N. Coppersmith, Mark Friesen, Robert Joynt, and M. A. Eriksson, Nature Commun. 13, 7777 (2022). Article
  21. “Atomic fluctuations lifting the energy degeneracy in Si/SiGe quantum dots,” Brian Paquelet Wuetz, Merritt P. Losert, Sebastian Koelling, Lucas E. A. Stehouwer, Anne-Marije J. Zwerver, Stephan G. J. Philips, Mateusz T. Mądzik, Xiao Xue, Guoji Zheng, Mario Lodari, Sergey V. Amitonov, Nodar Samkharadze, Amir Sammak, Lieven M. K. Vandersypen, Rajib Rahman, Susan N. Coppersmith, Oussama Moutanabbir, Mark Friesen, and Giordano Scappucci, Nature Commun. 13, 7730 (2022). Article
  22. “Charge-noise resilience of two-electron quantum dots in Si/SiGe heterostructures,” H. Ekmel Ercan, Mark Friesen, and S. N. Coppersmith, Phys. Rev. Lett. 128, 247701 (2022). Article
  23. “How valley-orbit states in silicon quantum dots probe quantum well interfaces,” J. P. Dodson, H. Ekmel Ercan, J. Corrigan, Merritt P. Losert, Nathan Holman, Thomas McJunkin, L. F. Edge, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. Lett. 128, 146802 (2022). Article
  24. “Long-range two-hybrid-qubit gates mediated by a microwave cavity with red sidebands,” J. C. Abadillo-Uriel, Evelyn King, S. N. Coppersmith, and Mark Friesen, Phys. Rev. A 104, 032612 (2021). Article
  25. “Strong electron-electron interactions in Si/SiGe quantum dots,” H. Ekmel Ercan, S. N. Coppersmith, and Mark Friesen, Phys. Rev. B 104, 235302 (2021). Article
  26. “Valley splittings in Si/SiGe quantum dots with a germanium spike in the silicon well,” Thomas McJunkin, E. R. MacQuarrie, Leah Tom, S. F. Neyens, J. P. Dodson, Brandur Thorgrimsson, J. Corrigan, H. Ekmel Ercan, D. E. Savage, M. G. Lagally, Robert Joynt, S. N. Coppersmith, Mark Friesen, and M. A. Eriksson, Phys. Rev. B 104, 085406 (2021). Article
  27. “Theory of hole-spin qubits in strained germanium quantum dots,” L. A. Terrazos, E. Marcellina, Zhanning Wang, S. N. Coppersmith, Mark Friesen, A. R. Hamilton, Xuedong Hu, Belita Koiller, A. L. Saraiva, Dimitrie Culcer, and Rodrigo B. Capaz, Phys. Rev. B 103, 125201 (2021). Article
  28. “Coherent control and spectroscopy of a semiconductor quantum dot Wigner molecule,” J. Corrigan, J. P. Dodson, H. Ekmel Ercan, J. C. Abadillo-Uriel, Brandur Thorgrimsson, T. J. Knapp, Nathan Holman, Thomas McJunkin, Samuel F. Neyens, E. R. MacQuarrie, Ryan H. Foote, L. F. Edge, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. Lett. 127, 127701 (2021) Article
  29. “Charge qubit in a triple quantum dot with tunable coherence,” B. Kratochwil, J. V. Koski, A. J. Landig, P. Scarlino, J. C. Abadillo-Uriel, C. Reichl, S. N. Coppersmith, W. Wegscheider, Mark Friesen, A. Wallraff, T. Ihn, and K. Ensslin, Phys. Rev. Research 3, 013171 (2021). Article
  30. “Progress toward a capacitively mediated CNOT between two charge qubits in Si/SiGe,” E. R. MacQuarrie, Samuel F. Neyens, J. P. Dodson, J. Corrigan, Brandur Thorgrimsson, Nathan Holman, M. Palma, L. F. Edge, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, npj Quantum Inform. 6, 81 (2020). Article
  31. “Microwave engineering for semiconductor quantum dots in a cQED architecture,” Nathan Holman, J. P. Dodson, L. F. Edge, S. N. Coppersmith, Mark Friesen, R. McDermott, and M. A. Eriksson, Appl. Phys. Lett. 117, 083502 (2020). Article
  32. “Effect of Quantum Hall Edge Strips on Valley Splitting in Silicon Quantum Wells,” Brian Paquelet Wuetz, Merritt P. Losert, Alberto Tosato, Mario Lodari, Peter L. Bavdaz, Lucas Stehouwer, Payam Amin, James S. Clarke, Susan N. Coppersmith, Amir Sammak, Menno Veldhorst, Mark Friesen, and Giordano Scappucci, Phys. Rev. Lett. 125, 186801 (2020). Article
  33. “Spatial Noise Correlations in a Si/SiGe Two-Qubit Device from Bell State Coherences,” Jelmer M. Boter, Xiao Xue, Tobias S. Krähenmann, Thomas F. Watson, Vickram N. Premakumar, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, Robert Joynt, and Lieven M. K. Vandersypen, Phys. Rev. B 101, 235133 (2020). Article
  34. “Strong photon coupling to the quadrupole moment of an electron in a solid-state qubit,” J. V. Koski, A. J. Landig, M. Russ, J. C. Abadillo-Uriel, P. Scarlino, B. Kratochwil, C. Reichl, W. Wegscheider, Guido Burkard, Mark Friesen, S. N. Coppersmith, A. Wallraff, K. Ensslin, and T. Ihn, Nature Physics 16, 642 (2020). Article
  35. “Repetitive Quantum Nondemolition Measurement and Soft Decoding of a Silicon Spin Qubit,” Xiao Xue, Benjamin D’Anjou, Thomas F. Watson, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, William A. Coish, and Lieven M. K. Vandersypen, Phys. Rev. X 10, 021006 (2020). Article
  36. “Lifting of spin blockade by charged impurities in Si-MOS double quantum dot devices,” Evelyn King, Joshua S. Schoenfield, M. J. Calderón, Belita Koiller, André Saraiva, Xuedong Hu, HongWen Jiang, Mark Friesen, and S. N. Coppersmith, Phys. Rev. B 101, 155411 (2020). Article
  37. “Majorana bound states in nanowire-superconductor hybrid systems in periodic magnetic fields,” Viktoriia Kornich, Maxim G. Vavilov, Mark Friesen, M. A. Eriksson, and S. N. Coppersmith, Phys. Rev. B 101, 125414 (2020). Article
  38. “High-fidelity entangling gates for quantum-dot hybrid qubits based on exchange interactions,” Yuan-Chi Yang, S. N. Coppersmith, and Mark Friesen, Phys. Rev. A 101, 012338 (2020). Article
  39. “Measurements of Capacitive Coupling Within a Quadruple-Quantum-Dot Array,” Samuel F. Neyens, E.R. MacQuarrie, J.P. Dodson, J. Corrigan, Nathan Holman, Brandur Thorgrimsson, M. Palma, Thomas McJunkin, L.F. Edge, Mark Friesen, S.N. Coppersmith, and M.A. Eriksson, Phys. Rev. Appl. 12, 064049 (2019). Article
  40. “High-fidelity single-qubit gates in a strongly driven quantum-dot hybrid qubit with 1/f charge noise,” Yuan-Chi Yang, S. N. Coppersmith, and Mark Friesen, Phys. Rev. A 100, 022337 (2019). Article
  41. “Enhancing the dipolar coupling of a S-T_0 qubit with a transverse sweet spot,” J. C. Abadillo-Uriel, M. A. Eriksson, S. N. Coppersmith, and M. Friesen, Nature Commun. 10, 5641 (2019). Article
  42. “Virtual-photon-mediated spin-qubit–transmon coupling,” A. J. Landig, J. V. Koski, P. Scarlino, C. Müller, J. C. Abadillo-Uriel, B. Kratochwil, C. Reichl, W. Wegscheider, S. N. Coppersmith, Mark Friesen, A. Wallraff, T. Ihn, and K. Ensslin, Nature Commun. 10, 5037 (2019). Article
  43. “Adiabatic two-qubit gates in capacitively coupled quantum dot hybrid qubits,” Adam Frees, Sebastian Mehl, John King Gamble, Mark Friesen, and S. N. Coppersmith, npj Quantum Inform. 5, 73 (2019). Article
  44. “Achieving high-fidelity single-qubit gates in a strongly driven charge qubit with 1/f charge noise,” Yuan-Chi Yang, S. N. Coppersmith, and Mark Friesen, npj Quantum Inform. 5, 12 (2019). Article
  45. “Compressed Optimization of Device Architectures for semiconductor quantum devices,” Adam Frees, John King Gamble, Daniel R. Ward, Robin Blume-Kohout, M.A. Eriksson, Mark Friesen, and S.N. Coppersmith, Phys. Rev. Appl. 11, 024063 (2019). Article
  46. “A programmable two-qubit quantum processor in silicon,” T. F. Watson, S. G. J. Philips, E. Kawakami, D. R. Ward, P. Scarlino, M. Veldhorst, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen, Nature 555, 633–637 (2018). Article
  47. “Valley dependent anisotropic spin splitting in silicon quantum dots,” Rifat Ferdous, Erika Kawakami, Pasquale Scarlino, Michal P. Nowak, D. R. Ward, D. E. Savage, M. G. Lagally, S. N. Coppersmith, Mark Friesen, Mark A. Eriksson, L. M. K. Vandersypen, and Rajib Rahman, npj Quantum Inform. 4, 26 (2018). Article
  48. “The critical role of substrate disorder in valley splitting in Si quantum wells,” Samuel F. Neyens, Ryan H. Foote, Brandur Thorgrimsson, T. J. Knapp, Thomas McJunkin, L. M. K. Vandersypen, Payam Amin, Nicole K. Thomas, James S. Clarke, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, Appl. Phys. Lett. 112, 243107 (2018). Article
  49. “Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit,” J. C. Abadillo-Uriel, Brandur Thorgrimsson, Dohun Kim, L. W. Smith, C. B. Simmons, Daniel R. Ward, Ryan H. Foote, J. Corrigan, D. E. Savage, M. G. Lagally, M. J. Calderón, S. N. Coppersmith, M. A. Eriksson, and Mark Friesen, Phys. Rev. B 98, 165438 (2018). Article
  50. “Measurement-free implementations of small-scale surface codes for quantum-dot qubits,” H. Ekmel Ercan, Joydip Ghosh, Daniel Crow, Vickram N. Premakumar, Robert Joynt, Mark Friesen, and S. N. Coppersmith, Phys. Rev. A 97, 012318 (2018). Article
  51. “Phonon-induced decoherence of a charge quadrupole qubit,” Viktoriia Kornich, Maxim G. Vavilov, Mark Friesen, and S. N. Coppersmith, New J. Phys. 20, 103048 (2018). Article
  52. “Extending the coherence of a quantum dot hybrid qubit,” Brandur Thorgrimsson, Dohun Kim, Yuan-Chi Yang, L. W. Smith, C. B. Simmons, Daniel R. Ward, Ryan H. Foote, J. Corrigan, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, npj Quantum Inform. 3, 32 (2017). Article
  53. “Dressed photon-orbital states in a quantum dot: Inter-valley spin resonance,” P. Scarlino, E. Kawakami, T. Jullien, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen, Phys. Rev. B 95, 165429 (2017). Article
  54. “Achieving high-fidelity single-qubit gates in a strongly driven silicon-quantum-dot hybrid qubit,” Yuan-Chi Yang, S. N. Coppersmith, and Mark Friesen, Phys. Rev. A 95, 162321 (2017). Article
  55. “A decoherence-free subspace in a charge quadrupole qubit,” Mark Friesen, Joydip Ghosh, M. A. Eriksson, and S. N. Coppersmith, Nature Commun. 8, 15923 (2017). Article
  56. “Pulse sequences for suppressing leakage in single-qubit gate operations,” Joydip Ghosh, S. N. Coppersmith, and Mark Friesen, Phys. Rev. B 95, 241307(R) (2017). Article
  57. “Effects of charge noise on a pulse-gated singlet-triplet S-T- qubit,” Zhenyi Qi, X. Wu, D. R. Ward, J. R. Prance, Dohun Kim, John King Gamble, R. T. Mohr, Zhan Shi, D. E. Savage, M. G. Lagally, M. A. Eriksson, Mark Friesen, S. N. Coppersmith, and M. G. Vavilov, Phys. Rev. B 96, 115305 (2017). Article
  58. “Characterization of a gate-defined double quantum dot in a Si/SiGe nanomembrane,” T. J. Knapp, R. T. Mohr, Yize Stephanie Li, Brandur Thorgrimsson, Ryan H. Foote, Xian Wu, Daniel R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, IOP Nanotechnology 27, 154002 (2016). Article
  59. “Gate fidelity and coherence of an electron spin in a Si/SiGe quantum dot with micromagnet,” E. Kawakami, T. Jullien, P. Scarlino, D. R. Ward, D. E. Savage, M. G. Lagally, V. V. Dobrovitski, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen, Proc. Nat. Acad. Sci. 113, 11738-11743 (2016). Article
  60. “State-conditional coherent charge qubit oscillations in a Si/SiGe quadruple quantum dot,” Dan R. Ward, Dohun Kim, Donal E. Savage, Max G. Lagally, Ryan H. Foote, Mark Friesen, Susan N. Coppersmith and Mark A. Eriksson, npj Quantum Information 2, 16032 (2016). Article
  61. “Microwave-driven coherent operation of a semiconductor quantum dot charge qubit,” Dohun Kim, D. R. Ward, C. B. Simmons, John King Gamble, Robin Blume-Kohout, Erik Nielsen, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nature Nano. 5, 243-247 (2015). Article
  62. “Identifying single electron charge sensor events using wavelet edge detection,” J. R. Prance, B. J. Van Bael, C. B. Simmons, D. E. Savage, M. G. Lagally, M. Friesen, S. N. Coppersmith, and M. A. Eriksson, Nanotechnology 26, 215201 (2015). Article
  63. “Characterizing gate operations near the sweet spot of an exchange-only qubit,” Jianjia Fei, Jo-Tzu Hung, Teck Seng Koh, Yun-Pil Shim, S. N. Coppersmith, Xuedong Hu, and Mark Friesen, Phys. Rev. B 91, 205434 (2015). Article
  64. “High-fidelity singlet-triplet S-T- qubits in inhomogeneous magnetic fields,” Clement H. Wong, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen, Phys. Rev. B 92, 045403 (2015). Article
  65. “Second-harmonic coherent driving of a spin qubit in a Si/SiGe quantum dot,” P. Scarlino, E. Kawakami, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen, Phys. Rev. Lett. 115, 106802 (2015). Article
  66. “Transport through an impurity tunnel coupled to a Si/SiGe quantum dot,” Ryan H. Foote, Daniel R. Ward, J. R. Prance, John King Gamble, Erik Nielsen, Brandur Thorgrimsson, D. E. Savage, A. L. Saraiva, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 107, 103112 (2015). Article
  67. “High-fidelity resonant gating of a silicon-based quantum dot hybrid qubit,” Dohun Kim, D. R. Ward, C. B. Simmons, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, npj Quantum Information 1, 15004 (2015). Article
  68. “Electrical control of a long-lived spin qubit in a Si/SiGe quantum dot,” E. Kawakami, P. Scarlino, D. R. Ward, F. R. Braakman, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, and L. M. K. Vandersypen, Nature Nano 9, 666-670 (2014). Article
  69. “Quantum control and process tomography of a semiconductor quantum dot hybrid qubit,” Dohun Kim, Zhan Shi, C. B. Simmons, D. R. Ward, J. R. Prance, Teck Seng Koh, John King Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nature 511, 70-74 (2014). Article
  70. “Decoherence of an exchange qubit by hyperfine interaction,” Jo-Tzu Hung, Jianjia Fei, Mark Friesen, and Xuedong Hu, Phys. Rev. B 90, 045308 (2014). Article
  71. “Two-axis control of a singlet-triplet qubit with an integrated micromagnet,” Xian Wu, D. R. Ward, J. R. Prance, Dohun Kim, John King Gamble, R.T. Mohr, Zhan Shi, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Proc. Nat. Acad. Sci. 111, 11938-11942 (2014). Article
  72. “Fast coherent manipulation of three-electron states in a double quantum dot,” Zhan Shi, C. B. Simmons, Daniel R. Ward, J. R. Prance, Xian Wu, Teck Seng Koh, John King Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nature Comm. 5, 3020 (2014). Article.
  73. “Tunneling in Nanoscale Devices,” Mark Friesen, M. Y. Simmons, and M. A. Eriksson, arXiv:1310.611
  74. “High-fidelity gates in quantum dot spin qubits,” Teck Seng Koh, S. N. Coppersmith, and Mark Friesen, PNAS 110, 19695 (2013). Article.
  75. “Disorder-induced valley-orbit hybrid states in Si quantum dots,” John King Gamble, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen, Phys. Rev. B 88, 035310 (2013). Article.
  76. “Comparing algorithms for graph isomorphism using discrete- and continuous-time quantum random walks,” Kenneth Rudinger, John King Gamble, Eric Bach, Mark Friesen, Robert Joynt, and S. N. Coppersmith, J. Comput. and Theor. Nanoscience 10, 1653-1661 (2013). Article, arXiv:1207.4535.
  77. “Probing quantum phase transitions on a spin chain with a double quantum dot,” Yun-Pil Shim, Sangchul Oh, Jianjia Fei, Xuedong Hu, and Mark Friesen, Phys. Rev. B 87, 155405 (2013). Article
  78. “Power-law scaling for the adiabatic algorithm for search-engine ranking,” Adam Frees, John King Gamble, Kenneth Rudinger, Eric Bach, Mark Friesen, Robert Joynt, and S. N. Coppersmith, Phys. Rev. A 88, 032307 (2013). Article
  79. “Coherent quantum oscillations and echo measurements of a Si charge qubit,” Zhan Shi, C. B. Simmons, Daniel R. Ward, J. R. Prance, R. T. Mohr, Teck Seng Koh, John King Gamble, Xian Wu, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. B 88, 075416 (2013). Article
  80. “Resonant adiabatic passage with three qubits,” Sangchul Oh, Yun-Pil Shim, Jianjia Fei, Mark Friesen, and Xuedong Hu, Phys. Rev. A 87, 022332 (2013). Article
  81. “Mediated gates between spin qubits,” Jianjia Fei, Dong Zhou, Yun-Pil Shim, Sangchul Oh, Xuedong Hu, and Mark Friesen, Phys. Rev. A 86, 062328 (2012). Article
  82. Pulse-Gated Quantum-Dot Hybrid Qubit, Teck Seng Koh, John King Gamble, Mark Friesen, M. A. Eriksson, and S. N. Coppersmith, Phys. Rev. Lett. 109, 250503 (2012). Article
  83. “Noninteracting multiparticle quantum random walks applied to the graph isomorphism problem for strongly regular graphs,” K. Rudinger, J. K. Gamble, M. Wellons, E. Bach, M. Friesen, R. Joynt, and S. N. Coppersmith, Phys. Rev. A 86, 022334 (2012). Article
  84. “Two-electron dephasing in single Si and GaAs quantum dots,” J. K. Gamble, M. Friesen, S. N. Coppersmith, and X. Hu, Phys. Rev. B 86, 035302 (2012). Article
  85. “Effect of randomness on quantum data buses of Heisenberg spin chains,” S. Oh, Y.-P. Shim, J. Fei, M. Friesen, and X. Hu, Phys. Rev. B 85, 224418 (2012). Article
  86. “Effective mass theory of monolayer d doping in the high density limit,” D. W. Drumm, L. C. L. Hollenberg, M. Y. Simmons, and M. Friesen, Phys. Rev. B 85, 155419 (2012). Article
  87. “Fast hybrid silicon double-quantum-dot qubit,” Z. Shi, C. B. Simmons, J. R. Prance, J. K. Gamble, T. S. Koh. Y.-P. Shim, X. Hu, D. E. Savage, M. G. Lagally, M. A. Eriksson, M. Friesen, and S. N. Coppersmith, Phys. Rev. Lett. 108, 140503 (2012). Article
  88. “Single-shot measurement of triplet-singlet relaxation in a Si/SiGe double quantum dot,” J. R. Prance, Zhan Shi, C. B. Simmons, D. E. Savage, M. G. Lagally, L. R. Schreiber, L. M. K. Vandersypen, Mark Friesen, Robert Joynt, S. N. Coppersmith, M. A. Eriksson, Phys. Rev. Lett. 108, 046808 (2012). Article
  89. “Tunable Spin Loading and T1 of a Silicon Spin Qubit Measured by Single-Shot Readout,” C. B. Simmons, J. R. Prance, B. J. Van Bael, T. S. Koh, Z. Shi, D. E. Savage, M. G. Lagally, R. Joynt, M. Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. Lett. 106, 156804 (2011). Article
  90. “Controllable Anisotropic Exchange Coupling between Spin Qubits in Quantum Dots,” Yun-Pil Shim, Sangchul Oh, Xuedong Hu, and Mark Friesen Phys. Rev. Lett. 106, 180503 (2011). Article
  91. “Unconventional Transport in the “Hole” Regime of a Si Double Quantum Dot,” Teck Seng Koh, C. B. Simmons, M. A. Eriksson, S. N. Coppersmith, Mark Friesen, Phys. Rev. Lett. 106, 186801 (2011). Article
  92. “Single-shot measurement and tunnel-rate spectroscopy of a Si/SiGe few-electron quantum dot,” Madhu Thalakulam, C. B. Simmons, B. J. Van Bael, B. M. Rosemeyer, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. B 84, 045307 (2011). Article
  93. “Cooling of cryogenic electron bilayers via the Coulomb interaction,” John King Gamble, Mark Friesen, Robert Joynt, and S. N. Coppersmith, Phys. Rev. B 84, 125321 (2011). Article
  94. “Tunable singlet-triplet splitting in a few-electron Si/SiGe quantum dot,” Zhan Shi, C. B. Simmons, J. R. Prance, John King Gamble, Mark Friesen, D. E. Savage, M. G. Lagally, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 99, 233108 (2011). Article
  95. “Heisenberg spin bus as a robust transmission line for quantum-state transfer,” Sangchul Oh, Lian-Ao Wu, Yun-Pil Shim, Jianjia Fei, Mark Friesen, and Xuedong Hu Phys. Rev. A 84, 022330 (2011). Article
  96. “Spectroscopy of few-electron single-crystal silicon quantum dots,” M. Fuechsle, S. Mahapatra, F. A. Zwanenburg, M. Y. Simmons, M. Friesen, and M. A. Eriksson, Nature Nanotechn. 5, 502 (2010). Article
  97. “Even-odd effects of Heisenberg chains on long-range interaction and entanglement,” Sangchul Oh, Mark Friesen, and Xuedong Hu Phys. Rev. B 82, 140403 (2010). Article
  98. “Pauli Spin Blockade and Lifetime-Enhanced Transport in a Si/SiGe double quantum dot,” C. B. Simmons, Teck Seng Koh, Nakul Shaji, Madhu Thalakulam, L. J. Klein, Hua Qin, H. Luo, D. E. Savage, M. G. Lagally, A. J. Rimberg, Robert Joynt, Robert Blick, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. B 82, 245312 (2010). Article
  99. “Two-particle quantum walks applied to the graph isomorphism problem,” John King Gamble, Mark Friesen, Dong Zhou, Robert Joynt, and S. N. Coppersmith Phys. Rev. A 81, 052313 (2010). Article
  100. “Extended interface states enhance valley splitting in Si/SiO2,” A. L. Saraiva, Belita Koiller, Mark Friesen, Phys. Rev. B 82, 245314 (2010). Article
  101. “Fast tunnel rates in Si/SiGe one-electron single and double quantum dots,” M. Thalakulam, C. B. Simmons, B. M. Rosemeyer, D. E. Savage, M. G. Lagally, M. Friesen, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 96, 183104 (2010). Article
  102. “Valley splitting in a Si/SiGe quantum point contact,” L. M. McGuire, M. Friesen, K. A. Slinker, S. N. Coppersmith, and M. A. Eriksson, New J. Phys. 12, 033039 (2010). Article
  103. “Theory of valley-orbit coupling in a Si/SiGe quantum dot,” M. Friesen and S. N. Coppersmith, Phys. Rev. B. 81, 115324 (2010). Article
  104. “Charge sensing and controllable tunnel coupling in a Si/SiGe double quantum dot,” C. B. Simmons, Madhu Thalakulam, B. M. Rosemeyer, B. J. Van Bael, E. K. Sackmann, D. E. Savage, M. G. Lagally, R. Joynt, M. Friesen, S. N. Coppersmith, and M. A. Eriksson, Nano Lett. 9, 3234 (2009). Article
  105. “Si/SiGe Quantum Devices, Quantum Wells, and Electron-Spin Coherence,” by J. L. Truitt, K. A. Slinker, K. L. M. Lewis, D. E. Savage, C. Tahan, L. J. Klein, R. Joynt, M. G. Lagally, D. W. van der Weide, S. N. Coppersmith, M. Friesen and M. A. Eriksson, in Topics in Applied Physics, vol. 115:  Electron Spin Resonance and Related Phenomena in Low-Dimensional Structures, Ed. M. Fanciulli (Springer-Verlag, Berlin, 2009), p. 101. Article
  106. “Sidewall damage in plasma etching of Si/SiGe heterostructures,” R. Ding, L. J. Klein, Mark G. Friesen, M. A. Eriksson, and A. E. Wendt, Journ. Vac. Sci. and Technol. A 27, 836 (2009). Article
  107. “Spin blockade and lifetime-enhanced transport in a few-electron Si/SiGe double quan-tum dot,” Nakul Shaji, C. B. Simmons, Madhu Thalakulam, Levente J. Klein, Hua Qin, H. Luo, D. E. Savage, M. G. Lagally, A. J. Rimberg, R. Joynt, M. Friesen, R. H. Blick, S. N. Coppersmith and M. A. Eriksson, Nature Physics 4, 540 (2008). Article
  108. “Multiscale theory of valley splitting,” S. Chutia, S. N. Coppersmith, and M. Friesen, Phys. Rev. B 77, 193311 (2008). Article
  109. “Top-gated few-electron double quantum dot in Si/SiGe,” N. Shaji, C. B. Simmons, L. J. Klein, Hua Qin, D. E. Savage, M.G. Lagally, S. N. Coppersmith, R. Joynt, M. Friesen, R. H. Blick, and M. A. Eriksson, Physica E 40, 520 (2008). Article
  110. News and Views: Quantum devices: Nanowires charge towards integration,” M. A. Eriksson and M. Friesen, Nature Nanotech. 2, 595 (2007). Article
  111. “Efficient Multiqubit Entanglement via a Spin Bus,” Mark Friesen, Asoka Biswas, Xuedong Hu, and Daniel Lidar, Phys. Rev. Lett. 98, 230503 (2007). Article
  112. “Valley splitting theory of SiGe/Si/SiGe quantum wells,” M. Friesen, S. Chutia, C. Tahan, and S. N. Coppersmith, Phys Rev. B 75, 115318 (2007). Article
  113.  “Controllable valley splitting in silicon quantum devices,” S. Goswami, K. A. Slinker, M. Friesen, L. M. McGuire, J. L. Truitt, C. Tahan, L. J. Klein, J. O. Chu, P. M. Mooney, D. W. van der Weide, R. Joynt, S. N. Coppersmith, and M. A. Eriksson, Nature Physics 3, 41 (2007). Article
  114. “Magnetic field dependence of valley splitting in realistic Si/SiGe quantum wells,” M. Friesen, M. A. Eriksson, and S. N. Coppersmith, Appl. Phys. Lett. 89, 202106 (2006). Article
  115. “Detection and measurement of the Dzyaloshinskii-Moriya interaction in double quantum dot systems,” S. Chutia, M. Friesen, and R. Joynt, Phys. Rev. B. 73, 241304 (2006). Article
  116. “Elastically relaxed free-standing strained-silicon nanomembranes,” M. M. Roberts, L. J. Klein, D. E. Savage, K. A. Slinker, M. Friesen, G. Celler, M. A. Eriksson, and M. G. Lagally, Nature Materials 5, 388 (2006). Article
  117. “Quantum dots and etch-induced depletion of a silicon two-dimensional electron gas,” L. J. Klein, K. L. M. Lewis, K. A. Slinker, S. Goswami, D. W. van der Weide, R. H. Blick, P. M. Mooney, J. O. Chu, S. N. Coppersmith, M. Friesen, and M. A. Eriksson, J. Appl. Phys. 99, 023509 (2006). Article
  118. “Quantum Dots in Si/SiGe 2DEGs with Schottky top-gated leads,” K. A. Slinker, K. L. M. Lewis, C. C. Haselby, S. Goswami, L. J. Klein, J. O. Chu, S. N. Coppersmith, R. Joynt, R. H. Blick, M. Friesen, and M. A. Eriksson, New Journ. Phys. 7, 246 (2005). Article
  119. “Theory of the Stark Effect for P donors in Si,” Mark Friesen, Phys. Rev. Lett. 94, 186403 (2005). Article
  120. “Vortex dynamics differences due to twin-boundary pinning anisotropy in YBa2Cu3Ox at low temperatures for H parallel to ab planes,” S. Salem-Sugui, A. D. Alvarenga, M.  Friesen, K. C. Goretta, O. F. Schilling, F. G. Gandra, B. W. Veal, and P. Paulikas, Phys. Rev. B 71, 024503 (2005). Article
  121. “Spin-based Quantum Dot Quantum Computing in Silicon,” M. A. Eriksson, M. Friesen, S. N. Coppersmith, R. Joynt, L. J. Klein, K. Slinker, C. Tahan, P. M. Mooney, J. O. Chu, and S. J. Koester, Quant. Inform. Process. 3, 133 (2004). Article
  122. “Valley splitting in low-density quantum-confined heterostructures studied using tight-binding models,” T. B. Boykin, G. Klimeck, M. Friesen, S. N. Coppersmith, P. von Allmen, F. Oyafuso, and S. Lee, Phys. Rev. B. 70, 165325 (2004). Article
  123. “Lowest Landau level diamagnetic fluctuations in niobium,” S. Salem-Sugui, M. Friesen, A. D. Alvarenga, et al., Physica C 408-410, 664 (2004). Article
  124. “One-spin quantum logic gates from the exchange interaction and a global magnetic field,” L.-A. Wu, D. A. Lidar, and M. Friesen, Phys. Rev. Lett. 93, 030501 (2004). Article
  125. “Coulomb Blockade in a Si:SiGe Two-Dimensional Electron Gas Quantum Dot,” L. J. Klein, K. Slinker, J. L. Truitt, S. Goswami, K. L. M. Lewis, S. N. Coppersmith, D. W. van der Weide, Mark Friesen, R. Blick, D. E. Savage, M. G. Lagally, Charles Tahan, Robert Joynt, M. A. Eriksson, Appl. Phys. Lett. 84, 4047 (2004). Article
  126. “Valley splitting in strained silicon quantum wells,” T. B. Boykin, G. Klimeck, M. A. Eriksson, M. Friesen, S. N. Coppersmith, P. von Allmen, F. Oyafuso, and S. Lee, Appl. Phys. Lett. 84, 115 (2004). Article
  127. “Spin readout and initialization in a semiconductor quantum dot,” M. Friesen, C. Tahan, R. Joynt, and M. A. Eriksson, Phys. Rev. Lett. 92, 037901 (2004). Article
  128. “Pseudo-Digital Qubits: A General Approach,” M. Friesen, R. Joynt, and M. A. Eriksson,” in Proceedings of the 6th International Conference on Quantum Communication, Measurement and Computing (QCMC02) (Rinton Press, Princeton, NJ, 2003), pp. 271-274. Article
  129. “Practical design and simulation of silicon-based quantum dot qubits,” M. Friesen, P. Rugheimer, D. E. Savage, et al., Phys. Rev. B 67, 121301 (R) (2003). Article
  130. “Pseudo-digital quantum bits,” M. Friesen, R. Joynt, and M. A. Eriksson, Appl. Phys. Lett. 81, 4619 (2002). Article
  131. “Experimental observation of high-field diamagnetic fluctuations in niobium,” S. Salem-Sugui, M. Friesen, A. D. Alvarenga, et al., Phys. Rev. B 66, 134521 (2002). Article
  132. “Decoherence of electron spin qubits in Si-based quantum computers,” C. Tahan, M. Friesen, R. Joynt, Phys. Rev. B 66, 035314 (2002). Article
  133. “Comparison of magnetic- and chemical-boundary roughness in magnetic films and multilayers,” J. J. Kelly, B. M. Barnes, F. Flack, et al., J. Appl. Phys. 91, 9978-9986 (2002). Article
  134. “Study of vortices fluctuations in deoxygenated YBaCuO single crystals,” S. Salem-Sugui, M. Friesen, A. D. Alvarenga, et al., J. Magn. Magn. Mater 226, 304-306 (2001). Article
  135. “Reply to Comment on ‘Temperature dependence of the second magnetization peak in a deoxygenated YBa2Cu3O6.65 single crystal,'” S. Salem-Sugui, A. D. Alvarenga, M. Friesen, et al., Phys. Rev. B 63, 216502 (2001). Article
  136. “Nonlinear current flow in superconductors with restricted geometries,” M. Friesen, A. Gurevich, Phys. Rev. B 63, 064521 (2001). Article
  137. “Nonlinear current flow and electric field domains in inhomogeneous superconductors,” A. Gurevich, M. Friesen, V. Vinokur, Physica C 341, 1249-1250 (2000). Article
  138. “Nonlinear transport current flow in superconductors with planar obstacles,” A. Gurevich, M. Friesen, Phys. Rev. B 62, 4004-4025 (2000). Article
  139. “Dynamic scaling of I-V data for the neutral 2D Coulomb gas,” S. W. Pierson, M. Friesen, Physica B 284, 610-611 (2000). Article
  140. “On the periodic behavior of solutions to a diffusion problem describing currents in a high-temperature superconductor,” P. Bauman, M. Friesen, and D. Phillips, Physica D 137, 172-191 (2000). Article
  141. “Dynamic scaling for two-dimensional superconductors, Josephson-junction arrays, and superfluids,” S. W. Pierson, M. Friesen, S. M. Ammirata, et al., Phys. Rev B 60, 1309-1325 (1999). Article
  142. “Temperature dependence of the second magnetization peak in a deoxygenated YBa2Cu3O6.65 single crystal,” S. Salem-Sugui, L. Ghivelder, M. Friesen, et al., Phys. Rev. B 60, 102-105 (1999). Article
  143. “Dynamic scaling for 2D superconductors in zero magnetic field,” S. M. Ammirata, M. Friesen, S. W. Pierson, et al., Physica C 313, 225-231 (1999). Article
  144. “Two-phase region of vortex-solid melting: 3D XY theory,” M. Friesen, P. Muzikar, Europhys. Lett. 43, 65-70 (1998). Article
  145. “3D XY scaling theory of the superconducting phase transition,” M. Friesen, P. Muzikar, Physica C 302, 67-77 (1998). Article
  146. “Order parameter and magnetic field of a vortex line pinned at a point defect: Ginzburg-Landau theory,” M. Friesen, P. Muzikar, Phys. Rev. B 57, 2709-2712 (1998). Article
  147. “Universality of glass scaling in a YBa2Cu3O7-  thin film,” K. Moloni, M. Friesen, S. Li, et al., Phys. Rev. B 56, 14784-14789 (1997). Article
  148. “3D XY and lowest Landau level fluctuations in deoxygenated YBa2Cu3O7-  thin films,” K. Moloni, M. Friesen, S. Li, et al., Phys. Rev. Lett. 78, 3173-3176 (1997). Article
  149. “Superconducting impurity terms in the Ginzburg-Landau equations and supercurrent: A microscopic theory,” M. Friesen, P. Muzikar, Phys. Rev. B 55, 509-514 (1997). Article
  150. “Ginzburg-Landau impurity terms for unconventional superconductors,” M. Friesen, P. Muzikar, Czeck J. Phys. 46, 1061-1062 Suppl. 2 (1996).
  151. “Robust critical behavior in YBa2Cu3O7 thin films,” M. Friesen, J. Deak, L. F. Hou, et al., Phys. Rev. B 54, 3525-3529 (1996). Article
  152. “Microscopic theory of vortex pinning: Impurity terms in the Ginzburg-Landau free energy,” M. Friesen, P. Muzikar, Phys. Rev. B 53, 11953-11956 (1996). Article
  153. “Critical and noncritical behavior of the Kosterlitz-Thouless-Berezinskii transition,” M. Friesen, Phys. Rev. B 53, R514-R517 (1996). Article
  154. “Unpaired vortices and layer decoupling in quasi-2-dimensional superconductors”a model calculation,” M. Friesen, Phys. Rev. B 51, 12786-12796 (1995). Article
  155. “Vortex unbinding and layer decoupling in a quasi-2-dimensional superconductor,” M. Friesen, Phys. Rev. B 51, 632-635 (1995). Article
  156. “1st-order unbinding transition in layered superconductors,” M. G. Friesen, Physica B 194, 1691-1692 Part 2 (1994). Article