Relation between quantum illumination and quantum parameter estimation
- URL: http://arxiv.org/abs/2308.07150v1
- Date: Mon, 14 Aug 2023 13:57:53 GMT
- Title: Relation between quantum illumination and quantum parameter estimation
- Authors: Wei Zhong, Wen-Yi Zhu, Yang Li, Lan Zhou, Ming-Ming Du, Yu-Bo Sheng
- Abstract summary: We show that signal-to-noise ratio and quantum Fisher information are equivalent to Quantum Illumination (QI) in the limit of zero object reflectivity.
We further demonstrate this equivalence by investigating QI protocols employing non-Gaussian states, which are obtained by de-Gaussifying the two-mode squeezed vacuum state with photon addition and photon subtraction.
- Score: 7.261893691836341
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum illumination (QI) leverages entangled lights to detect the potential
presence of low-reflective objects in a region surrounded by a thermal bath.
Homologously, quantum parameter estimation utilizes non-classical probes to
accurately estimate the value of the unknown parameter(s) of interest in a
system. There appears to be a certain connection between these two areas.
However, they are commonly studied using different figures of merit:
signal-to-noise ratio and quantum Fisher information. In this study, we prove
that the two measures are equivalent to QI in the limit of zero object
reflectivity. We further demonstrate this equivalence by investigating QI
protocols employing non-Gaussian states, which are obtained by de-Gaussifying
the two-mode squeezed vacuum state with photon addition and photon subtraction.
However, our analysis leads to a no-go result which demonstrates that
de-Gaussification operations do not offer an advantage compared to the null
case.
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