Multimode theory of measurementinduced nonGaussian operation on wideband squeezed light: Analytical formula
Abstract
We develop a multimode theory to design the frequency mode matching in the photonsubtracting operation by an on/offtype photon detector on a wideband squeezed light. The output state thus generated is known to be the Schroedingercatlike state. Its Wigner function constructed by the homodyne tomography must have a negative dip around the phase space origin. In order to observe this nonclassical effect, however, one must achieve good mode matching between the fields observed by the on/off and homodyne detectors, those are quite different types from each other. The events are defined for finite measurement time duration T, and are measured by the homodyne detector with finite bandwidth B. We provide an explicit formulus to calculate the Wigner function of the state, taking into account multimode aspects of the squeezed light and the time and band limitation to the quantum states. A unified picture of the mode matching in terms of the single parameter BT is presented, covering the cw and pulsed schemes. The nonclassical effect can be realized and measured most remarkably when the modes excited in the detectors could be restricted to a single mode by taking BT as small as possible, and could reduce dark counts in themore »
 Authors:
 National Institute of Information and Communications Technology, 421 NukuiKita, Koganei, Tokyo 1848795 (Japan)
 (Japan)
 Publication Date:
 OSTI Identifier:
 20787161
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevA.73.043807; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS; ENERGY LEVELS; NOISE; OPERATION; PHASE SPACE; PHOTONS; QUANTUM MECHANICS; TOMOGRAPHY; VISIBLE RADIATION
Citation Formats
Sasaki, Masahide, CREST, Japan Science and Technology Agency, 199 Yaesu, Chuoh, Tokyo 1030028, Suzuki, Shigenari, and Department of Electronics and Electrical Engineering, Keio University, 3141 Hiyoshi Kohoku, Yokohama 2238522. Multimode theory of measurementinduced nonGaussian operation on wideband squeezed light: Analytical formula. United States: N. p., 2006.
Web. doi:10.1103/PHYSREVA.73.0.
Sasaki, Masahide, CREST, Japan Science and Technology Agency, 199 Yaesu, Chuoh, Tokyo 1030028, Suzuki, Shigenari, & Department of Electronics and Electrical Engineering, Keio University, 3141 Hiyoshi Kohoku, Yokohama 2238522. Multimode theory of measurementinduced nonGaussian operation on wideband squeezed light: Analytical formula. United States. doi:10.1103/PHYSREVA.73.0.
Sasaki, Masahide, CREST, Japan Science and Technology Agency, 199 Yaesu, Chuoh, Tokyo 1030028, Suzuki, Shigenari, and Department of Electronics and Electrical Engineering, Keio University, 3141 Hiyoshi Kohoku, Yokohama 2238522. Sat .
"Multimode theory of measurementinduced nonGaussian operation on wideband squeezed light: Analytical formula". United States.
doi:10.1103/PHYSREVA.73.0.
@article{osti_20787161,
title = {Multimode theory of measurementinduced nonGaussian operation on wideband squeezed light: Analytical formula},
author = {Sasaki, Masahide and CREST, Japan Science and Technology Agency, 199 Yaesu, Chuoh, Tokyo 1030028 and Suzuki, Shigenari and Department of Electronics and Electrical Engineering, Keio University, 3141 Hiyoshi Kohoku, Yokohama 2238522},
abstractNote = {We develop a multimode theory to design the frequency mode matching in the photonsubtracting operation by an on/offtype photon detector on a wideband squeezed light. The output state thus generated is known to be the Schroedingercatlike state. Its Wigner function constructed by the homodyne tomography must have a negative dip around the phase space origin. In order to observe this nonclassical effect, however, one must achieve good mode matching between the fields observed by the on/off and homodyne detectors, those are quite different types from each other. The events are defined for finite measurement time duration T, and are measured by the homodyne detector with finite bandwidth B. We provide an explicit formulus to calculate the Wigner function of the state, taking into account multimode aspects of the squeezed light and the time and band limitation to the quantum states. A unified picture of the mode matching in terms of the single parameter BT is presented, covering the cw and pulsed schemes. The nonclassical effect can be realized and measured most remarkably when the modes excited in the detectors could be restricted to a single mode by taking BT as small as possible, and could reduce dark counts in the on/off detector and the vacuum noise invasion in the homodyne detector. Practical design of experimental setup is described based on presently available technologies.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 4,
volume = 73,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}

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