Interference of local-measurement histories

• URL: http://arxiv.org/abs/2605.23232v1
• Date: Fri, 22 May 2026 04:49:04 GMT
• Title: Interference of local-measurement histories
• Abstract summary: We show that interference of histories is generated under coherent control, leading to entanglement.<n>Our results extend the notion of quantum interference beyond unitary evolution to genuinely measurement-driven dynamics.
• Score: 0.8629862888374241
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The evolution of a quantum system comprises two fundamental processes--continuous unitary dynamics and stochastic measurement-induced jumps. The latter are often viewed as a source of decoherence. Can two histories of such an evolution, made up of local measurements, interfere with each other? Here, we answer this question in the affirmative. A manifestation of this interference is the generation of entanglement between two parts of the system that are individually coupled to distinct detectors. Specifically, we develop a protocol in which two alternative local measurement processes act on a pair of qubits, and show how interference of histories is generated under coherent control, leading to entanglement. Furthermore, we find that averaging over the detectors' readouts still results in an entangled (albeit not maximally entangled) state. Our results extend the notion of quantum interference beyond unitary evolution to genuinely measurement-driven dynamics, and identify limits on the generation of quantum correlations using interference of measurement histories.

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