Towards entanglement-enhanced probing of atomic parity violation

• URL: http://arxiv.org/abs/2605.27775v1
• Date: Tue, 26 May 2026 23:55:00 GMT
• Title: Towards entanglement-enhanced probing of atomic parity violation
• Abstract summary: We review the Atomic parity violation (APV) mechanism, the state of the art in Cs and Yb, and recent trapped-ion, optical-lattice, and molecular proposals.<n>We show that entanglement can strongly accelerate statistical averaging, but the ultimate precision is set by APV-specific systematic floors.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Atomic parity violation (APV) provides a low-energy probe of the weak interaction between electrons and nuclei, complementary to collider tests of the Standard Model. Isotope-chain measurements are especially attractive because they test weak-charge scaling while reducing dependence on absolute atomic-structure theory. We review the APV mechanism, the state of the art in Cs and Yb, and recent trapped-ion, optical-lattice, and molecular proposals. Motivated by progress in coherent control of atoms, ions, and molecules, we ask a metrological question: given N probes distributed over an isotope chain, what quantum strategy optimally measures a deviation from Standard Model weak-charge scaling? The optimum is a particular form of a cross-isotope cat state protocol. We compare this protocol with the standard quantum limit, squeezed-array, same-isotope cat, and discuss extension to recently suggested decoherence-free subspace protocols. We show that entanglement can strongly accelerate statistical averaging, but the ultimate precision is set by APV-specific systematic floors which require careful studies.

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