2008/04/30 by Masahiro Takeoka, Hiroki Takahashi, Masahide Sasaki · 3 citations
Computer Science · Mathematics · Physics and Astronomy · #Amplitude #Coherent states #Cold Atom Physics and Bose-Einstein Condensates #Mathematics #Multi-mode optical fiber #Optical fiber #Optics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum electrodynamics #Quantum mechanics #Squeezed coherent state #Subtraction #Superposition principle #Vacuum state #quant-ph
paper · pdf · doi:10.1103/physreva.77.062315
published as Phys. Rev. A 77, 062315 (2008) · 9 pages, 8 figures
openalex publication_date 2008/06/12 · arxiv created 2008/06/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A theoretical analysis is given for a two-photon subtraction from a continuous-wave squeezed vacuum with finite time separation between two detection events. In the cw photon subtraction process, generated states are inevitably described by temporal multimode states. Our approach is based on analytical formulas that are mathematically simple and provide an intuitive understanding of the multimode structure of the system. We show that, in our process, the photon-subtracted squeezed vacuum is generated in two temporal modes and one of these modes acts as an ancillary mode to make the other one a large-amplitude coherent-state superposition.