Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session F53: Defects in SiC and hBN
11:30 AM–2:06 PM,
Tuesday, March 16, 2021
Sponsoring Units: DMP DCOMP FIAP
Chair: Lee Bassett, University of Pennsylvania
Abstract: F53.00009 : Scaling quantum systems with silicon carbide and molecules*
1:30 PM–2:06 PM
We then discuss various strategies to extend the coherence of these spin qubits including isotopic purification, clock transitions, pulsed dynamical decoupling, and continuous driving to engineer a decoherence protected subspace [2,3]. These subspaces are decoupled from the major sources of noise, resulting in an over 10,000 times improvement in coherence . Finally, we demonstrate the control and entanglement of a single nuclear spin with an electron spin in SiC. These nuclear memories can further extend coherence and enable multi-qubit quantum registers .
Optically addressable spin qubits can also be created, engineered, and scaled through a purely synthetic chemical approach. Moreover, these structures offer new opportunities to construct hybrid systems. We demonstrate the optical initialization and readout, and coherent control, of ground-state spins in organometallic molecules . This bottom-up approach offers avenues to create designer qubits and to deploy the diverse capabilities of chemical synthesis for scalable quantum systems.
 C. P. Anderson* and A. Bourassa* et al., Science 366, 6470, 1225-1230 (2019)
 A. Bourassa* and C. P. Anderson* et al., Nat. Mat. (2020), arXiv:2005.07602
 K. Miao et al., Science 369, 1493–1497 (2020)
 S. L. Bayliss*, D. W. Laorenza*, et al., arXiv:2004.07998 (2020)
In collaboration with: C. Anderson, A. Bourassa, K. Miao, S. Bayliss, D. Laorenza, G. Galli, D. Freedman
*Supported by AFOSR, DARPA, NSF, ONR, DOE
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