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Quantum Computing

Simulation of Coupled Quantum Dots

Electrons in silicon have relatively long spin coherence times, motivating research into the use of quantum dots in Si/SiGe as prototype qubits.

The SEM micrograph and schematic at left shows a Si/SiGe double quantum dot used for both single-shot spin measurement and to demonstrate a record figure of merit in a semiconductor charge qubit.

Selected publications on this topic:

"State-conditional coherent charge qubit oscillations in a Si/SiGe quadruple quantum dot." D. R. Ward, Dohun Kim, D. E. Savage, M. G. Lagally, R. H. Foote, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, npj Quant. Inf. 2, 16032 (2016). [Journal Article | arXiv]

"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 Quant. Inf. 1, 15004 (2015). [Journal Article | arXiv]

"Microwave-driven coherent operations of a semiconductor quantum dot charge qubit." Dohun Kim, D. R. Ward, C. B. Simmons, John King Gamble, R. Blume-Kohout, E. Nielsen, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nature Nanotech. 10, 243 (2015). [Journal Article | arXiv]

"Two-axis control of a singlet-triplet qubit with an integrated micromagnet." X. 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. Natl. Acad. Sci. 111, 11938 (2014). [Journal Article | arXiv]

"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 (2014). [Journal Article | arXiv]

"Fast coherent manipulation of three-electron states in a double quantum dot." Zhan Shi, C. B. Simmons, D. R. Ward, J. R. Prance, X. 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). [Journal Article | arXiv]

"Semiconductor Quantum Dot Qubits." M. A. Eriksson, S. N. Coppersmith, and M. G. Lagally, MRS Bulletin 38, 794 (2013). [Journal Article]

"Excitation of a Si/SiGe quantum dot using an on-chip microwave antenna." E. Kawakami, P. Scarlino, L. R. Schreiber, J. R. Prance, D. E. Savage, M. G. Lagally, M. A. Eriksson, and L. M. K. Vandersypen, Appl. Phys. Lett. 103, 132410 (2013). [Journal Article | arXiv]

"Coherent quantum oscillations and echo measurements of a Si charge qubit." Zhan Shi, C. B. Simmons, D. R. Ward, J. R. Prance, R. T. Mohr, Teck Seng Koh, John King Gamble, X. Wu, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. B 88, 075416 (2013). [Journal Article | arXiv]

"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). [Journal Article | arXiv]

"Silicon Quantum Electronics." F. A. Zwanenburg, Andrew S. Dzurak, Andrea Morello, Michelle Y. Simmons, L. C. L. Hollenberg, Gerhard Klimeck, S. Rogge, S. N. Coppersmith, and M. A. Eriksson, Rev. Mod. Phys. 85, 961 (2013). [Journal Article | arXiv]

"Integration of on-chip field-effect transistor switches with dopantless Si/SiGe quantum dots for high-throughput testing." D. R. Ward, D. E. Savage, M. G. Lagally, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 102, 213107 (2013). [Journal Article | arXiv]

"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). [Journal Article | arXiv]

"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, and M. A. Eriksson, Phys. Rev. Lett. 108, 046808 (2012). [Journal Article | arXiv]

"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). [Journal Article | arXiv]

"Embracing the quantum limit in silicon computing." John J. L. Morton, Dane R. McCamey, M. A. Eriksson, and S. A. Lyon, Nature 479, 345 (2011). [Journal Article]

"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). [Journal Article | arXiv]

"Unconventional Transport in the "Hole" Regime of a Si Double Quantum Dot." Teck Seng Koh, C. B. Simmons, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen, Phys. Rev. Lett. 106, 186801 (2011). [Journal Article | arXiv]

"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, Teck Seng Koh, Zhan Shi, D. E. Savage, M. G. Lagally, Robert Joynt, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. Lett. 106, 156804 (2011). [Journal Article | arXiv]

"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, R. Blick, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Phys. Rev. B 82, 245312 (2010). [Journal Article | arXiv]

"Fast tunnel rates in Si/SiGe one-electron single and double quantum dots." Madhu Thalakulam, C. B. Simmons, B. M. Rosemeyer, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 96, 183104 (2010). [Journal Article | arXiv]

"Charge sensing in enhancement mode double-top-gated metal-oxide-semiconductor quantum dots." E. P. Nordberg, H. L. Stalford, R. W. Young, G. A. Ten Eyck, K. Eng, L. A. Tracy, K. D. Childs, A. E. Wendt, R. K. Grubbs, J. Stevens, M. P. Lilly, M. A. Eriksson, and M. S. Carroll, Appl. Phys. Lett. 95, 202102 (2009). [Journal Article | arXiv]

"Enhancement-mode double-top-gated metal-oxide-semiconductor nanostructures with tunable lateral geometry." E. P. Nordberg, G. A. Ten Eyck, H. L. Stalford, R. P. Muller, R. W. Young, K. Eng, L. A. Tracy, K. D. Childs, J. R. Wendt, R. K. Grubbs, J. Stevens, M. P. Lilly, M. A. Eriksson, and M. S. Carroll, Phys. Rev. B 80, 115331 (2009). [Journal Article | arXiv]

"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, Robert Joynt, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson, Nano Lett. 9, 3234 (2009). [Journal Article | arXiv]

"Spin blockade and lifetime-enhanced transport in a few-electron Si/SiGe double quantum dot." Nakul Shaji, C. B. Simmons, Madhu Thalakulam, L. J. Klein, Hua Qin, H. Luo, D. E. Savage, M. G. Lagally, A. J. Rimberg, Robert Joynt, Mark Friesen, R. Blick, S. N. Coppersmith, and M. A. Eriksson, Nat. Phys. 4, 540 (2008). [Journal Article | arXiv]

"Single-electron quantum dot in Si/SiGe with integrated charge sensing." C. B. Simmons, Madhu Thalakulam, Nakul Shaji, L. J. Klein, Hua Qin, R. Blick, D. E. Savage, M. G. Lagally, S. N. Coppersmith, and M. A. Eriksson, Appl. Phys. Lett. 91, 213103 (2007). [Journal Article | arXiv]

"Coulomb blockade and Kondo effect in a few-electron silicon/silicon-germanium quantum dot." L. J. Klein, D. E. Savage, and M. A. Eriksson, Appl. Phys. Lett. 90, 033103 (2007). [Journal Article | arXiv]

"Controllable valley splitting in silicon quantum devices." S. Goswami, K. A. Slinker, Mark Friesen, L. M. McGuire, J. L. Truitt, Charles Tahan, L. J. Klein, J. O. Chu, P. M. Mooney, Daniel W. van der Weide, Robert Joynt, S. N. Coppersmith, and M. A. Eriksson, Nat. Phys. 3, 41 (2007). [Journal Article | arXiv]

"Magnetic field dependence of valley splitting in realistic Si/SiGe quantum wells." Mark Friesen, M. A. Eriksson, and S. N. Coppersmith, Appl. Phys. Lett. 89, 202106 (2006). [Journal Article | arXiv]

"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, Robert Joynt, R. Blick, Mark Friesen, and M. A. Eriksson, N. Journ. Phys. 7, 246 (2005). [Journal Article | arXiv]

"Spin-Based Quantum Dot Quantum Computing in Silicon." M. A. Eriksson, Mark Friesen, S. N. Coppersmith, Robert Joynt, L. J. Klein, K. A. Slinker, Charles Tahan, P. M. Mooney, J. O. Chu, and S. J. Koester, Quant. Inf. Proc. 3, 133 (2004). [Journal Article]

"Coulomb blockade in a silicon/silicon-germanium two-dimensional electron gas quantum dot." L. J. Klein, K. A. Slinker, J. L. Truitt, S. Goswami, K. L. M. Lewis, S. N. Coppersmith, Daniel W. van der Weide, Mark Friesen, R. Blick, D. E. Savage, M. G. Lagally, Charles Tahan, Robert Joynt, M. A. Eriksson, J. O. Chu, J. A. Ott, and P. M. Mooney, Appl. Phys. Lett. 84, 4047 (2004). [Journal Article | arXiv]

"Valley splitting in strained silicon quantum wells." Timothy B. Boykin, Gerhard Klimeck, M. A. Eriksson, Mark Friesen, S. N. Coppersmith, Paul von Allmen, Fabiano Oyafuso, and Seungwon Lee, Appl. Phys. Lett. 84, 115 (2004). [Journal Article]

"Spin readout and initialization in a semiconductor quantum dot." Mark Friesen, Charles Tahan, Robert Joynt, and M. A. Eriksson, Phys. Rev. Lett. 92, 037901 (2004). [Journal Article]

"Practical design and simulation of silicon-based quantum-dot qubits." Mark Friesen, P. Rugheimer, D. E. Savage, M. G. Lagally, Daniel W. van der Weide, Robert Joynt, and M. A. Eriksson, Phys. Rev. B 67, 121301 (2003). [Journal Article | arXiv]

"Pseudo-digital quantum bits." Mark Friesen, Robert Joynt, and M. A. Eriksson, Appl. Phys. Lett. 81, 4619 (2002). [Journal Article]

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