Recent Publications

Realization of a CQ3 Qubit: energy spectroscopy and coherence,” Benedikt Kratochwil, Jonne V. Koski, Andreas J. Landig, Pasquale Scarlino, José C. Abadillo-Uriel, Christian Reichl, Susan N. Coppersmith, Werner Wegscheider, Mark Friesen, Andreas Wallraff, Thomas Ihn, and Klaus Ensslin, arXiv:2006.05883. Preprint [arXiv]
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) [arXiv | Journal]
   V. N. Premakumar, M. Saffman, and R. Joynt, Measurement-free error correction with coherent ancillas  arXiv  (2020)
Progress Towards 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, arXiv:2003.06768. Preprint [arXiv]
Impacts of random filling on spin squeezing via Rydberg dressing in optical clocks,” J. Van Damme, X. Zheng, M. Saffman, M.G. Vavilov, S. Kolkowitz, under review at PRX Quantum, pre-print at https://arxiv.org/abs/2010.04776
Three-Omega Thermal-Conductivity Measurements with Curved Heater Geometries,” G. R. Jaffe, Keenan J. Smith, Victor W. Brar, M. G. Lagally, and M. A. Eriksson, Appl. Phys. Lett. 117, 073102 (2020) [arXiv | Journal]
Atomic clock system,” MS Larsen, and TG Walker, US Patent 10,725,431 (2020) [GScholar]
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, arXiv:2006.02305. Preprint [arXiv]
Spatial Noise Correlations in a Si/SiGe Two-Qubit Device from Bell State Coherences,” Jelmer M. Boter, X. Xue, Tobias S. Krahenmann, T. F. Watson, Vickram N. Premakumar, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, Robert Joynt, and L. M. K. Vandersypen, Phys. Rev. B 101, 235133 (2020) [arXiv | Journal]
State-dependent phonon-limited spin relaxation of nitrogen-vacancy centers,” M.C. Cambria, A. Gardill, Y. Li, A. Norambuena, J.R. Maze, S. Kolkowitz, under review at Physical Review Letters, pre-print at https://arxiv.org/abs/2007.11529
Linear and Nonlinear Crystal Optics Using the Magnetic Field of Light,” Z. N. Buckholtz and D. D. Yavuz Phys. Rev. A 101, 02831 (2020)“ [PDF]
The effect of external electric fields on silicon with superconducting gallium nano-precipitates,” B. Thorgrimsson, T. McJunkin, E. R. MacQuarrie, S. N. Coppersmith, and M. A. Eriksson, J. Appl. Phys. 127, 215102 (2020) [arXiv | Journal]
M. Saffman,” I. I. Beterov, A. Dalal, E. J. Paez, and B. C. Sanders, Symmetric Rydberg controlled-Z gates with adiabatic pulses Phys. Rev. A 101 062309 (2020)
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) [Journal]
Adjoint-optimized nanoscale light extractor for nitrogen-vacancy centers in diamond,” R.A. Wambold, Z. Yu, Y. Xiao, B. Bachman, G. Jaffe, S. Kolkowitz, J.T. Choy, M. Eriksson, R.J. Hamers, and M.A. Kats, under review at Nanophotonics, pre-print at https://arxiv.org/abs/2007.04545
Repetitive quantum non-demolition measurement and soft decoding of a silicon spin qubit,” X. Xue, Benjamin D'Anjou, T. F. Watson, D. R. Ward, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, M. A. Eriksson, William A. Coish, and L. M. K. Vandersypen, Phys. Rev. X 10, 021006 (2020) [arXiv | Journal]
N. Lauk,” N. Sinclair, S. Barzanjeh, J. P. Covey, M. Saffman, M. Spiropulu, and C. Simon, Perspectives on quantum transduction, Qu. Sci. Tech. 5, 020501 (2020)
Lifting of spin blockade by charged impurities in Si-MOS double quantum dot devices,” Cameron 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) [Journal]
Auto-tuning of double dot devices in situ with machine learning,” Justyna P. Zwolak, T. McJunkin, Sandesh S. Kalantre, J. P. Dodson, E. R. MacQuarrie, D. E. Savage, M. G. Lagally, S. N. Coppersmith, M. A. Eriksson, and Jacob M. Taylor, Phys. Rev. Applied 13, 034075 (2020) [arXiv | Journal]
A Synchronous Spin-Exchange Optically Pumped NMR-Gyroscope,” SS Sorensen, DA Thrasher, and TG Walker, Applied Sciences 10 (20), 7099 (2020) [GScholar]
Fast relaxation on qutrit transitions of nitrogen-vacancy Centers in nanodiamonds,” A. Gardill, M.C. Cambria, and S. Kolkowitz, Physical Review Applied 13, 034010 (2020)
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) [Journal]
M. Kwon,” P. Yang, P. Huft, C. Young, M. Ebert, and M. Saffman, Generation of 14.0 W of single-frequency light at 770 nm by intracavity frequency doubling Opt. Lett.  45, 339 (2020)
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]
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, 4 (2019) [GScholar]
T. M. Graham,” M. Kwon, B. Grinkemeyer, Z. Marra, X. Jiang, M. T. Lichtman, Y. Sun, M. Ebert, and M. Saffman, Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array Phys. Rev. Lett. 123, 230501 (2019)
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]
An all-optical atomic magnetometer-gradiometer for use in Earth's field,” R Wyllie, A Perry, T Walker, B Buckley, G Morrison, and M Bulatowicz, APS 2019, S01. 037 (2019) [GScholar]
Microwave to optical conversion with atoms on a superconducting chip,” D. Petrosyan, K. Mølmer, J. Fortagh,and M. Saffman, New J. Phys. 21, 073033 (2019) [PDF]
Quantum computing with semiconductor spins,” L. M. K. Vandersypen and M. A. Eriksson, Physics Today 72, 38 (2019) [Journal]
Preparation and control of neutral atom ensemble qubits using Rydberg interactions,” C Young, M Kwon, P Yang, P Huft, B Radzom, M Ebert, and T Walker, APS 2019, E01. 097 (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, Physical Review A 100, 052326 (2019)
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]
Microwave-to-optical conversion via four-wave mixing in a cold ytterbium ensemble,” J. P. Covey, A. Sipahigil, and M. Saffman,  P hys. Rev. A 100, 012307 (2019) [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]
Synchronous Spin-Exchange Optically Pumped NMR Gyro,” D Thrasher, S Sorensen, M Bulatowicz, and T Walker, APS 2019, S01. 042 (2019) [GScholar]
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]
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]
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, 2 (2019) [GScholar]
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]