Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M29: Semiconductor Qubits - Novel Spin Qubit Materials and Technologies I
11:30 AM–2:30 PM,
Wednesday, March 17, 2021
Sponsoring Unit: DQI
Chair: Daniel Keith
Abstract: M29.00010 : Universal coherence protection and electrical control of spins in silicon carbide*
1:18 PM–1:54 PM
The application of periodic driving to the ground-state spin can augment the coherence properties of an already robust spin qubit. Continuous driving of the kh VV’s spin clock transitions results in dressed spin states that are highly resilient against environmental noise, yielding a qubit embedded in a decoherence-protected subspace (DPS) that is robust to magnetic, electric, and temperature fluctuations . We demonstrate arbitrary spin control in the DPS, allowing us to measure record-long electron spin dephasing times >22 ms – a 10,000-fold improvement over the undriven spin at nonzero magnetic fields. Since only a few key components are needed to achieve such improvements, we expect these techniques to be readily extended to other quantum architectures.
 K. C. Miao, et al., Sci. Adv. 5 (2019)
 K. C. Miao, et al., Science 369 (2020)
 C. P. Anderson*, A. Bourassa*, et al., Science 366 (2019)
In collaboration with C. P. Anderson, S. L. Bayliss, J. P. Blanton, A. Bourassa, A. L. Crook, S. J. Whiteley, G. Wolfowicz, G. Thiering, P. Udvarhelyi, V. Ivády, H. Abe, T. Ohshima, Á. Gali, and D. D. Awschalom.
*Work supported by AFOSR, DARPA, NSF, ONR, and the UChicago MRSEC.
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