Uncovering measurement-induced entanglement via directional adaptive dynamics and incomplete information

• URL: http://arxiv.org/abs/2310.01338v1
• Date: Mon, 2 Oct 2023 16:57:50 GMT
• Title: Uncovering measurement-induced entanglement via directional adaptive dynamics and incomplete information
• Authors: Yu-Xin Wang, Alireza Seif, Aashish A. Clerk
• Abstract summary: rich entanglement dynamics and transitions exhibited by monitored quantum systems typically only exist in the conditional state. We construct a general recipe for mimicking the conditional entanglement dynamics of a monitored system in a corresponding measurement-free dissipative system. This mirror setup autonomously implements a measurement-feedforward dynamics that effectively retains a small fraction of the information content in a typical measurement record.
• Score: 23.309064032922507
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The rich entanglement dynamics and transitions exhibited by monitored quantum systems typically only exist in the conditional state, making observation extremely difficult. In this work we construct a general recipe for mimicking the conditional entanglement dynamics of a monitored system in a corresponding measurement-free dissipative system involving directional interactions between the original system and a set of auxiliary register modes. This mirror setup autonomously implements a measurement-feedforward dynamics that effectively retains a small fraction of the information content in a typical measurement record. We illustrate our ideas in a bosonic system featuring a competition between entangling measurements and local unitary dynamics, and also discuss extensions to qubit systems and truly many-body systems.

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