Entanglement-enhanced optical atomic clocks

Author:

Colombo Simone1ORCID,Pedrozo-Peñafiel Edwin1ORCID,Vuletić Vladan1ORCID

Affiliation:

1. Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

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.

Funder

NSF Center for Ultracold Atoms

Center for Ultracold Atoms, Massachusetts Institute of Technology

Defense Sciences Office, DARPA

Office of Naval Research

NSF Division of Physics

NSF QLCI-CI QSEnSE

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

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