Rotational Coherence Times of Polar Molecules in Optical Tweezers
Name
PhysRevLett.127.123202.pdf
Description
Published version
Size
967.07 KB
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Checksum (MD5)
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Author(s)
Burchesky, Sean
Anderegg, Loïc
Bao, Yicheng
Yu, Scarlett S.
Chae, Eunmi
Ketterle, Wolfgang
Ni, Kang-Kuen
Doyle, John M.
Date Issued
September 2021
Journal
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
Abstract
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.
MIT Department
MIT-Harvard Center for Ultracold Atoms
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/physrevlett.127.123202
