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arXiv · 2307.05858

Quantum-Enhanced Metrology for Molecular Symmetry Violation using Decoherence-Free Subspaces

Chi Zhang·Phelan Yu·Arian Jadbabaie·Nicholas R. Hutzler
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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 which have been demonstrated experimentally.

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Chi Zhang, Phelan Yu, Arian Jadbabaie, Nicholas R. Hutzler. 2023-07-12. Quantum-Enhanced Metrology for Molecular Symmetry Violation using Decoherence-Free Subspaces. https://doi.org/10.1103/physrevlett.131.193602

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