Entanglement-enhanced quantum sensing via optimal global control

• URL: http://arxiv.org/abs/2409.12932v2
• Date: Fri, 4 Oct 2024 17:59:08 GMT
• Title: Entanglement-enhanced quantum sensing via optimal global control
• Authors: Vineesha Srivastava, Sven Jandura, Gavin K Brennen, Guido Pupillo,
• Abstract summary: We present a deterministic protocol for the preparation of arbitrary entangled states in the symmetric Dicke subspace of $N$ spins coupled to a common cavity mode. This work opens the way to entanglement-enhanced sensing with cold trapped atoms in cavities and is also relevant for experiments with trapped ions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a deterministic protocol for the preparation of arbitrary entangled states in the symmetric Dicke subspace of $N$ spins coupled to a common cavity mode. By combining a new geometric phase gate, an analytic solution of the noisy quantum channel dynamics and optimal control methods, the protocol prepares entangled states that are useful for quantum sensing, achieving a precision significantly better than the standard quantum limit in the presence of photon cavity loss, spontaneous emission and dephasing. This work opens the way to entanglement-enhanced sensing with cold trapped atoms in cavities and is also directly relevant for experiments with trapped ions.

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