Heisenberg-limited noisy atomic clock using a hybrid coherent and squeezed states protocol

• URL: http://arxiv.org/abs/2003.10943v1
• Date: Tue, 24 Mar 2020 16:16:26 GMT
• Title: Heisenberg-limited noisy atomic clock using a hybrid coherent and squeezed states protocol
• Authors: Luca Pezz\`e and Augusto Smerzi
• Abstract summary: We propose a hybrid quantum-classical atomic clock protocol where the interrogation of an ensemble of uncorrelated atoms in a spin-coherent state is used to feedback one (or more) spin-squeezed atomic ensembles toward their optimal phase sensitivity point. This protocol overcomes the stability of a single Ramsey clock and it reaches a Heisenberg-limited stability while avoiding non-destructive measurements.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose a hybrid quantum-classical atomic clock protocol where the interrogation of an ensemble of uncorrelated atoms in a spin-coherent state is used to feedback one (or more) spin-squeezed atomic ensembles toward their optimal phase sensitivity point. This protocol overcomes the stability of a single Ramsey clock and it reaches a Heisenberg-limited stability while avoiding non-destructive measurements. Analytical predictions are compared with numerical simulations of clocks operations including correlated 1/f local oscillator noise.

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