Quantum-Classical Boundary Engineering in Weak-to-Strong Measurements via Squeezed Vacua

• URL: http://arxiv.org/abs/2507.21548v1
• Date: Tue, 29 Jul 2025 07:22:36 GMT
• Title: Quantum-Classical Boundary Engineering in Weak-to-Strong Measurements via Squeezed Vacua
• Authors: Janarbek Yuanbek, Wen-Long Ma, Yusuf Turek,
• Abstract summary: This study establishes a post-selected von Neumann framework to regulate non-classical features of single-photon-subtracted squeezed vacuum states.<n>Phase-space analysis via the Husimi Kano Q function reveals a critical transition: as coupling strength increases, SPSSV and TMSV states evolve from quantum non-Gaussianity to classical single-peak separability.
• Score: 0.19662978733004596
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This study establishes a post-selected von Neumann framework to regulate non-classical features of single-photon-subtracted squeezed vacuum (SPSSV) and two-mode squeezed vacuum (TMSV) states during weak-to-strong measurement transitions. By synergizing Wigner-Yanase skew information, Amplitude Squared (AS) squeezing, sum squeezing, and photon statistics, we demonstrate weak value amplification as a unified control mechanism for quantum properties. Phase-space analysis via the Husimi Kano Q function reveals a critical transition: as coupling strength increases, SPSSV and TMSV states evolve from quantum non-Gaussianity to classical single-peak separability, marking a quantum-classical boundary crossing. This critical point is validated as the optimal threshold for noise suppression and signal enhancement in quantum metrology. The work provides a tunable platform for quantum sensing and weak-signal detection technologies.

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