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

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.

7+11 pages, 3+3 figures

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Cited by in corpus (7)

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• Engineered Molecular Clock Transitions for Symmetry Violation Searches
• Ultracold high-spin $\Sigma$-state polar molecules for new physics searches
• Parity-Doublet Coherence Times in Optically Trapped Polyatomic Molecules
• Radioactive Molecules as Laboratories of Fundamental Physics