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.
Original language | English |
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Article number | 230501 |
Journal | Physical Review Letters |
Volume | 128 |
Issue number | 23 |
DOIs | |
Publication status | Published - 6 Jun 2022 |
Bibliographical note
Funding Information:We thank Krishna C. Balram, Patrick M. Birchall, Osian Wolley, and Gabriel R. Higgins for helpful discussions. A. B. acknowledges support from the EPSRC Grant No. EP/S023607/1. E. J. A. acknowledges support from an EPSRC doctoral prize from EP/R513179/1 and the Royal Academy of Engineering under the Research Fellowship scheme. J. C. F. M. acknowledges support from the EPSRC UK Quantum Technology Hub in Quantum Enhanced Imaging (QuantIC) EP/T00097X/1. A. B. and J. C. F. M. acknowledge support from the ERC starting Grant No. ERC-2018-STG 803665. All data needed to evaluate the conclusions of the paper are present in the main text and the Supplementary Information.
Funding
We thank Krishna C. Balram, Patrick M. Birchall, Osian Wolley, and Gabriel R. Higgins for helpful discussions. A. B. acknowledges support from the EPSRC Grant No. EP/S023607/1. E. J. A. acknowledges support from an EPSRC doctoral prize from EP/R513179/1 and the Royal Academy of Engineering under the Research Fellowship scheme. J. C. F. M. acknowledges support from the EPSRC UK Quantum Technology Hub in Quantum Enhanced Imaging (QuantIC) EP/T00097X/1. A. B. and J. C. F. M. acknowledge support from the ERC starting Grant No. ERC-2018-STG 803665. All data needed to evaluate the conclusions of the paper are present in the main text and the Supplementary Information.
ASJC Scopus subject areas
- General Physics and Astronomy