Rotational Coherence Times of Polar Molecules in Optical Tweezers
Author(s)
Burchesky, Sean; Anderegg, Loïc; Bao, Yicheng; Yu, Scarlett S.; Chae, Eunmi; Ketterle, Wolfgang; Ni, Kang-Kuen; Doyle, John M.; ... Show more Show less
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Qubit coherence times are critical to the performance of any robust quantum computing platform. For quantum information processing using arrays of polar molecules, a key performance parameter is the molecular rotational coherence time. We report a 93(7) ms coherence time for rotational state qubits of laser cooled CaF molecules in optical tweezer traps, over an order of magnitude longer than previous systems. Inhomogeneous broadening due to the differential polarizability between the qubit states is suppressed by tuning the tweezer polarization and applied magnetic field to a "magic" angle. The coherence time is limited by the residual differential polarizability, implying improvement with further cooling. A single spin-echo pulse is able to extend the coherence time to nearly half a second. The measured coherence times demonstrate the potential of polar molecules as high fidelity qubits.
Date issued
2021-09Department
MIT-Harvard Center for Ultracold Atoms; Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Burchesky, Sean, Anderegg, Loïc, Bao, Yicheng, Yu, Scarlett S, Chae, Eunmi et al. 2021. "Rotational Coherence Times of Polar Molecules in Optical Tweezers." Physical Review Letters, 127 (12).
Version: Final published version
ISSN
0031-9007
1079-7114