Nonclassicality of a photon-subtracted Gaussian field

Journal Article · Fri Apr 01 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.043805· OSTI ID:20653344

Kim, M S; Park, E ^[1]; Knight, P L ^[2]; Jeong, H ^[3]

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1. School of Mathematics and Physics, The Queen's University, Belfast, BT7 1NN (United Kingdom)
2. Blackett Laboratory, Imperial College, London SW7 2BW (United Kingdom)
3. Department of Physics, University of Queensland, St Lucia, Queensland 4072 (Australia)

We investigate the nonclassicality of a photon-subtracted Gaussian field, which was produced in a recent experiment, using negativity of the Wigner function and the nonexistence of well-behaved positive P function. We obtain the condition to see negativity of the Wigner function for the case including the mixed Gaussian incoming field, the threshold photodetection and the inefficient homodyne measurement. We show how similar the photon-subtracted state is to a superposition of coherent states.

• OSTI ID: 20653344
• Journal Information: Physical Review. A, Vol. 71, Issue 4; Other Information: DOI: 10.1103/PhysRevA.71.043805; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION OPERATORS
DETECTION
EIGENSTATES
OPTICS
PHOTONS
QUANTUM MECHANICS
WIGNER DISTRIBUTION