Using non-Gaussian quantum states for detection of a given phase shift

• URL: http://arxiv.org/abs/2405.07049v1
• Date: Sat, 11 May 2024 16:39:24 GMT
• Title: Using non-Gaussian quantum states for detection of a given phase shift
• Authors: V. L. Gorshenin, F. Ya. Khalili,
• Abstract summary: Injecting a non-Gaussian (Fock or Shr"odinger cat) quantum state into the dark port of a two-arm interferometer and a strong classical light into the bright one, it is possible to detect a given phase shift unambiguously. The optical losses degrade the sensitivity, introducing the finite "false positive" and "false negative" detection errors. Using the state-of-art photodetectors, it is still possible to obtain better detection fidelity than in the case of Gaussian quantum states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Injecting a non-Gaussian (Fock or Shr\"odinger cat) quantum state into the dark port of a two-arm interferometer and a strong classical light into the bright one, it is possible, in principle, to detect a given phase shift unambiguously using the orthogonality between the original and displaced in the interferometer non-Gaussian states. The optical losses degrade the sensitivity, introducing the finite "false positive" and "false negative" detection errors. However, using the state-of-art photodetectors, it is still possible to obtain better detection fidelity than in the case of Gaussian quantum states.

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