Using anti-squeezed Schrödinger cat states for detection of a given phase shift

2026/03/31 by V. L. Gorshenin, K. D. Dyadkin, S. D. Chikalkin
Physics and Astronomy · #quant-ph

paper · pdf

13 pages, 10 figures

arxiv created 2026/07/29 · arxiv updated 2026/07/31

Abstract

We propose to use the antisqueezing-enhanced non-Gaussian Schrödinger cat quantum states of the probing light for the task of detection of a given phase shift in optical interferometers. We show that the antisqueezing allows to increase the robustness of the setup to optical losses. We find the optimal degrees of the antisqueezing for experimentally achievable values of the Schrödinger cat amplitude and the optical losses and compare the resulting sensitivity with the one provided by the Gaussian squeezed states.

Citations

• Optimal Phase-Insensitive Force Sensing with Non-Gaussian States
• Quantum-enhanced sensing of photonic modes with cat states
• Using non-Gaussian quantum states for detection of a given phase shift
• Algorithm of quantum engineering of large-amplitude high-fidelity cat states in setup with k beam splitters and with inefficient photon number resolving detection
• Sensitivity of quantum-enhanced interferometers
• Robustness of negativity of the Wigner function to dissipation

Related

• Using non-Gaussian quantum states for detection of a given phase shift
• High-fidelity detection of a phase shift using non-Gaussian quantum\n states of light
• The effect of Quantum Statistics on the sensitivity in an SU(1,1) interferometer
• Taming an Optical Schroedinger's cat - A quantum non-demolition approach
• Enhanced quantum phase estimation with q-deformed nonideal nonclassical light