Entanglement-enhanced optical atomic clocks

doi:10.1063/5.0121372

Entanglement-enhanced optical atomic clocks

2022-11-21

19

OA

AI

S

Simone Colombo *

E

Edwin Pedrozo-Peñafiel

V

Vladan Vuletić

DOI：10.1063/5.0121372

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Abstract

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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. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/).

Keywords:

LATTICE CLOCK

NOISE

GENERATION

STABILITY

MATTER

STATES

LIMIT

Entanglement-enhanced optical atomic clocks

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