Quantum-Enhanced Metrology for Molecular Symmetry Violation using Decoherence-Free Subspaces
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1.
California Institute of Technology
Abstract
We propose a method to measure time-reversal symmetry violation in molecules that overcomes the standard quantum limit while leveraging decoherence-free subspaces to mitigate sensitivity to classical noise. The protocol does not require an external electric field, and the entangled states have no first-order sensitivity to static electromagnetic fields as they involve superpositions with zero average lab-frame projection of spins and dipoles. This protocol can be applied with trapped neutral or ionic species, and can be implemented using methods that have been demonstrated experimentally.
Copyright and License
© 2023 American Physical Society.
Acknowledgement
We acknowledge helpful discussions with Andreas Elben, Manuel Endres, Ran Finkelstein, Andrew Jayich, Dietrich Leibfried, Christopher Pattison, John Preskill, Tim Steimle, Yuiki Takahashi, Michael Tarbutt, Fabian Wolf, Xing Wu, and the PolyEDM Collaboration. This work was supported by Gordon and Betty Moore Foundation Grant No. GBMF7947, Alfred P. Sloan Foundation Grant No. G-2019-12502, and NSF CAREER Grant No. PHY-1847550. C. Z. acknowledges support from the David and Ellen Lee Postdoctoral Fellowship at Caltech. P. Y. acknowledges support from the Eddleman Graduate Fellowship through the Institute for Quantum Information and Matter (IQIM).
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Additional details
- ISSN
- 1079-7114
- Gordon and Betty Moore Foundation
- GBMF7947
- Alfred P. Sloan Foundation
- G-2019-12502
- National Science Foundation
- PHY-1847550
- Institute for Quantum Information and Matter, California Institute of Technology
- David and Ellen Lee Postdoctoral Fellowship at Caltech
- Eddleman Graduate Fellowship
- Caltech groups
- Institute for Quantum Information and Matter