Simultaneous quantum estimation of phase and indistinguishability in a
two photon interferometer
- URL: http://arxiv.org/abs/2303.15548v1
- Date: Mon, 27 Mar 2023 18:56:03 GMT
- Title: Simultaneous quantum estimation of phase and indistinguishability in a
two photon interferometer
- Authors: Laura T. Knoll and Gustavo M. Bosyk
- Abstract summary: We derive the quantum Fisher information matrix associated to the simultaneous estimation of an interferometric phase.
We perform an experiment based on a pair of photons with an unknown degree of indistinguishability entering a two-port interferometer.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: With the rapid development of quantum technologies in recent years, the need
for high sensitivity measuring techniques has become a key issue. In
particular, optical sensors based on quantum states of light have proven to be
optimal resources for high precision interferometry. Nevertheless, their
performance may be severely affected by the presence of noise or imperfections.
In this work we derive the quantum Fisher information matrix associated to the
simultaneous estimation of an interferometric phase and the
indistinguishability characterizing the probe state consisting of an even
number of photons. We find the optimal measurement attaining the ultimate
precision for both parameters in a single setup and perform an experiment based
on a pair of photons with an unknown degree of indistinguishability entering a
two-port interferometer.
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