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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2006, Volume 83, Issue 8, Pages 420–424 (Mi jetpl1291)  
QUANTUM INFORMATION SCIENCE

Generation of macroscopic entangled states by means of $\chi^{(2)}$ nonlinearity without photon number resolving detection

S. A. Podoshvedov

School of Computational Sciences, Korea Institute for Advanced Study, Seoul, South Korea 130-722
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Abstract: We generalise the scheme of conditional preparation of $\chi^{(2)}$ macroscopic entangled states [S.A. Podoshvedov, JETP 129, (2006)]. The studied system consists of the system of coupled down converters with type-I phase matching pumped simultaneously by powerful optical fields in coherent states, one auxiliary photon in superposition state of two input modes and projective measurement system. The projective measurement system involves two Hadamard gates introduced to generated output modes followed by photodetectors. Identification of macroscopic entangled states is produced by registration of one photon. No photon number resolving detection is requested for the studied scheme.
Received: 16.02.2006
Revised: 16.03.2006
English version:
Journal of Experimental and Theoretical Physics Letters, 2006, Volume 83, Issue 8, Pages 360–365
DOI: https://doi.org/10.1134/S0021364006080133
Bibliographic databases:
Document Type: Article
PACS: 03.65.Ud, 42.50.Dv
Language: English
Citation: S. A. Podoshvedov, “Generation of macroscopic entangled states by means of $\chi^{(2)}$ nonlinearity without photon number resolving detection”, Pis'ma v Zh. Èksper. Teoret. Fiz., 83:8 (2006), 420–424; JETP Letters, 83:8 (2006), 360–365
Citation in format AMSBIB
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