Husimi phase distribution in non-Gaussian operations
Phys. Rev. A 112, 023702 – Published 1 August, 2025
DOI: https://doi.org/10.1103/2bkt-vr3p
Abstract
The Husimi phase distribution, an experimentally measurable quantity, is investigated for single-mode and two-mode squeezed vacuum states. The analysis highlights that non-Gaussian operations, i.e., photon subtraction (PS), photon addition (PA), and photon catalysis (PC), are effective tools for localizing phase distribution and enhancing phase robustness in the presence of noise, while PC results in comparatively slower delocalization accompanied by more intricate phase features. The work highlights the perspective that the combined effects of squeezing, beam-splitter transmittance, and environmental interactions must be carefully considered when quantum state engineering protocols are designed, and phase properties provide a valuable insight into this endeavor.
