Quantum-Enhanced Metrology for Molecular Symmetry Violation Using Decoherence-Free Subspaces
Chi Zhang, Phelan Yu, Arian Jadbabaie, Nicholas R. Hutzler
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.
Topics & Concepts
PhysicsQuantum decoherenceQuantum mechanicsDecoherence-free subspacesQuantum metrologySensitivity (control systems)SpinsQuantum sensorQuantumMeasure (data warehouse)DephasingSymmetry (geometry)Statistical physicsQuantum technologyQuantum error correctionOpen quantum systemComputer scienceCondensed matter physicsDatabaseElectronic engineeringMathematicsGeometryEngineeringAtomic and Subatomic Physics ResearchQuantum optics and atomic interactionsQuantum Information and Cryptography