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arXiv · 2209.00471

Entanglement-Enhanced Optical Atomic Clocks

Simone Colombo·Edwin Pedrozo-Peñafiel·Vladan Vuletić
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Abstract

Recent developments in atomic physics have enabled the experimental generation of many-body entangled states to boost the performance of quantum sensors beyond the Standard Quantum Limit (SQL). This limit is imposed by the inherent projection noise of a quantum measurement. In this perspective article, we describe the commonly used experimental methods to create many-body entangled states to operate quantum sensors beyond the SQL. In particular, we focus on the potential of applying quantum entanglement to state-of-the-art optical atomic clocks. In addition, we present recently developed time-reversal protocols that make use of complex states with high quantum Fisher information without requiring sub-SQL measurement resolution. We discuss the prospects for reaching near-Heisenberg limited quantum metrology based on such protocols.

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Simone Colombo, Edwin Pedrozo-Peñafiel, Vladan Vuletić. 2022-09-01. Entanglement-Enhanced Optical Atomic Clocks. https://doi.org/10.1063/5.0121372

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