Quantum-state extraction from high-Q cavities

Abstract

The problem of extraction of a single-mode quantum state from a high-Q cavity is studied for the case in which the time of preparation of the quantum state of the cavity mode is short compared with its decay time. The temporal evolution of the quantum state of the field escaping from the cavity is calculated in terms of phase-space functions. A general condition is derived under which the quantum state of the pulse built up outside the cavity is a nearly perfect copy of the quantum state the cavity field was initially prepared in. The results show that unwanted losses prevent the realization of a nearly perfect extraction of nonclassical quantum states from high-Q optical microcavities with presently available technology.

RevTeX4, 9 pages with 6 figures; extended version as submitted to Phys. Rev. A

References in corpus (5)

• Optimal Sizes of Dielectric Microspheres for Cavity QED with Strong Coupling
• Cavity QED and quantum information processing with "hot" trapped atoms
• Robust generation of entanglement between two cavities mediated by short interactions with an atom
• Decoherence control in microwave cavities
• Input-output relations at dispersing and absorbing planar multilayers for the quantized electromagnetic field containing evanescent components

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• Leaky cavities with unwanted noise
• Realistic photon-number resolution in generalized Hong-Ou-Mandel experiment
• Probabilistic aspects of Wigner function
• Determination of quantum-noise parameters of realistic cavities
• Justification of the single-mode approximation for a finite-duration laser pulse interacting with an electron
• Quantum-state input-output relations for absorbing cavities
• Characterization of unwanted noise in realistic cavities