Recent Publications

Atomic clock system,” MS Larsen, and TG Walker, US Patent 10,539,929 (2020) [GScholar]
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) [Journal]
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) [Journal]
Anomalous Charge Noise in Superconducting Qubits,” B. G. Christensen, C. D. Wilen, A. Opremcak, J. Nelson, F. Schlenker, C. H. Zimonick, L. Faoro, L. B. Ioffe, Y. J. Rosen, J. L. DuBois, B. L. T. Plourde, R. McDermott, arXiv:1902.02911 (2019) [arXiv | PDF]
Microwave to optical conversion with atoms on a superconducting chip,” D. Petrosyan, K. Mølmer, J. Fortagh,and M. Saffman, to appear New J. Phys. (2019) [PDF]
Characterizing atomic magnetic gradiometers for fetal magnetocardiography,” IA Sulai, ZJ DeLand, MD Bulatowicz, CP Wahl, RT Wakai, and TG Walker, Review of Scientific Instruments 90 (8), 085003, 1 (2019) [GScholar]
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) [Journal]
Enhancing the dipolar coupling of a S-T0 qubit with a transverse sweet spot,” J. C. Abadillo-Uriel, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen, Nature Comm. 10, 5641 (2019) [arXiv | Journal]
Scalable Hardware-Efficient Qubit Control with Single Flux Quantum Pulse Sequences,” Kangbo Li, R. McDermott, and Maxim G. Vavilov, arXiv:1902.02911 (2019) [arXiv | PDF]
Quantum computing with semiconductor spins,” L. M. K. Vandersypen and M. A. Eriksson, Physics Today 72, 38 (2019) [Journal]
Microwave-to-optical conversion via four-wave-mixing in a cold ytterbium ensemble,” J. P. Covey, A. Sipahigil, and M. Saffman, to appear Phys. Rev. A (2019) [PDF]
Preparation and control of neutral atom ensemble qubits us-ing Rydberg interactions,” C Young, M Kwon, P Yang, P Huft, B Radzom, M Ebert, and T Walker, DAMOP19 Meeting of The American Physical Society (2019) [GScholar]
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) [Journal]
No-go bounds for quantum seals,” S. Kimmel and S. Kolkowitz, accepted for publication at Physical Review A, pre-print available at arXiv:1802.10007 (2019) [arXiv]
Benchmarking Gate Fidelities in a Si/SiGe Two-Qubit Device,” X. Xue, T. F. Watson, J. Helsen, D. R. Ward, D. E. Savage, M. G. Lagally, S. N. Coppersmith, M. A. Eriksson, S. Wehner, and L. M. K. Vandersypen, Phys. Rev. X 9, 021011 (2019) [arXiv | Journal]
Digital coherent control of a superconducting qubit,” Edward Leonard Jr., Matthew A. Beck, JJ Nelson, Brad G. Christensen, Ted Thorbeck, Caleb Howington, Alexander Opremcak, Ivan V. Pechenezhskiy, Kenneth Dodge, Nicholas P. Dupuis, Jaseung Ku, Francisco Schlenker, Joseph Suttle, Christopher Wilen, Shaojiang Zhu, Maxim G. Vavilov, Britton L. T. Plourde, Robert McDermott, Phys. Rev. Applied 11, 014009 (2019) [arXiv | Journal | PDF]
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) [Journal]
Measurements of the Thermal Resistivity of InAlAs, InGaAs, and InAlAs/InGaAs Superlattices,” G. R. Jaffe, S. Mei, C. Boyle, J. D. Kirch, D. E. Savage, D. Botez, L. J. Mawst, I. Knezevic, M. G. Lagally, and M. A. Eriksson, ACS Appl. Mat. Int. 11, 11970 (2019) [Journal]
Quantum computing with neutral atoms,” M. Saffman, Nat. Sci. Rev.6, 24 (2019) [PDF]
Dual-Axis -Pulse Magnetometer with Suppressed Spin-Exchange Relaxation,” E Zhivun, M Bulatowicz, A Hryciuk, and T Walker, Physical review applied 11 (3), 034040 (2019) [GScholar]
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) [Journal]
Measurement of a Superconducting Qubit with a Microwave Photon Counter,” A. Opremcak, I. V. Pechenezhskiy, C. Howington, B. G. Christensen, M. A. Beck, E. Leonard Jr., J. Suttle, C. Wilen, K. Nesterov, G. J. Ribeill, T. Thorbeck,1, F. Schlenker, M. G. Vavilov, B. L. T. Plourde, and R. McDermott, Science 361, 6408 (2019) [arXiv | Journal | PDF]
Compressed Optimization of Device Architectures for Semiconductor Quantum Devices,” Adam Frees, John King Gamble, D. R. Ward, R. Blume-Kohout, M. A. Eriksson, Mark Friesen, and S. N. Coppersmith, Phys. Rev. Applied 11, 024063 (2019) [arXiv | Journal]
Pulsed-beam atomic magnetometer system,” MD Bulatowicz, TG Walker, and MS Larsen, US Patent App. 16/053,535 (2018) [GScholar]
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) [Journal]
Signatures of atomic-scale structure in the energy dispersion and coherence of a Si quantum-dot qubit,” J. C. Abadillo-Uriel, B. Thorgrimsson, Dohun Kim, L. W. Smith, C. B. Simmons, D. R. Ward, R. H. Foote, J. Corrigan, D. E. Savage, M. G. Lagally, M. J. Calderon, S. N. Coppersmith, M. A. Eriksson, and Mark Friesen, Phys. Rev. B 98, 165438 (2018) [arXiv | Journal]
The critical role of substrate disorder for 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, and M. A. Eriksson, preprint arXiv:1804.01914, Applied Physics Letters 12, 243107 (2018) [arXiv | PDF]
Fast three-qubit Toffoli quantum gate based on three-body Förster resonances in Rydberg atoms,” 132 I. I. Beterov, I. N. Ashkarin, E. A. Yakshina, D. B. Tretyakov, V. M. Entin, I. I. Ryabtsev, P. Cheinet, P. Pillet, and M. Saffman, Phys. Rev. A 98, 042704 (2018) [PDF]
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) [Journal]
Nuclear magnetic resonance probe system,” MS Larsen, HC Abbink, TG Walker, and MD Bulatowicz, US Patent 9,970,999, 11 (2018) [GScholar]
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) [Journal]
Theory of long range interactions for Rydberg states attached to hyperfine-split cores,” F. Robicheaux, D. W. Booth, and M. Saffman, Phys. Rev. A 97, 022508 (2018) [PDF]
Quantum–Classical Interface Based on Single Flux Quantum Digital Logic,” R. McDermott, M. G. Vavilov, B. L. T. Plourde, F. K. Wilhelm, P. J. Liebermann, O. A. Mukhanov, and T. A. Ohki, Quantum Sci. Technol. 3, 024004 (2018) [arXiv | Journal | PDF]
Dual-axis pi-pulse SERF magnetometer for biomedical applications,” E Zhivun, M Bulatowicz, A Hryciuk, and T Walker, APS Meeting Abstracts (2018) [GScholar]
Progress towards entangling neutral atom ensemble qubits using Rydberg interactions,” M Kwon, C Young, M Ebert, T Walker, and M Saffman, APS Meeting Abstracts (2018) [GScholar]
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) [Journal]
Reducing the sensitivity of Rydberg atoms to dc electric fields using two-frequency ac field dressing,” D. W. Booth, J. Isaacs, and M. Saffman, Phys. Rev. A 97, 112515 (2018) [PDF]
Synchronous Spin Exchange Optically Pumped NMR Gyro,” S Sorensen, D Thrasher, J Weber, A Korver, and T Walker, APS Meeting Abstracts (2018) [GScholar]