Advantage of Coherent States in Ring Resonators over Any Quantum Probe Single-Pass Absorption Estimation Strategy

• URL: http://arxiv.org/abs/2112.07557v3
• Date: Tue, 7 Jun 2022 21:01:20 GMT
• Title: Advantage of Coherent States in Ring Resonators over Any Quantum Probe Single-Pass Absorption Estimation Strategy
• Authors: Alexandre Belsley, Euan J. Allen, Animesh Datta, Jonathan C. F. Matthews
• Abstract summary: We show that coherent-state probes in all-pass ring resonators can outperform any quantum probe single-pass strategy. We also find that under optimal conditions coherent-state probes equal the performance of arbitrarily bright pure single-mode squeezed probes.
• Score: 63.137661897716555
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum states of light have been shown to enhance precision in absorption estimation over classical strategies. By exploiting interference and resonant enhancement effects, we show that coherent-state probes in all-pass ring resonators can outperform any quantum probe single-pass strategy even when normalized by the mean input photon number. We also find that under optimal conditions coherent-state probes equal the performance of arbitrarily bright pure single-mode squeezed probes in all-pass ring resonators.

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