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Quantum Information Processing

Analysis of optical parity gates of generating Bell state for quantum information and secure quantum communication via weak cross-Kerr nonlinearity under decoherence effect

  • 01-04-2017
Published in:
Authors
Jino Heo
Chang-Ho Hong
Hyung-Jin Yang
Jong-Phil Hong
Seong-Gon Choi
Published in
Quantum Information Processing | Issue 4/2017

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Abstract

We demonstrate the advantages of an optical parity gate using weak cross-Kerr nonlinearities (XKNLs), quantum bus (qubus) beams, and photon number resolving (PNR) measurement through our analysis, utilizing a master equation under the decoherence effect (occurred the dephasing and photon loss). To generate Bell states, parity gates based on quantum non-demolition measurement using XKNL are extensively employed in quantum information processing. When designing a parity gate via XKNL, the parity gate can be diversely constructed according to the measurement strategies. In practice, the interactions of XKNLs in optical fiber are inevitable under the decoherence effect. Thus, by our analysis of the decoherence effect, we show that the designed parity gate employing homodyne measurement would not be expected to provide reliable quantum operation. Furthermore, compared with a parity gate using a displacement operator and PNR measurement, we conclude there is experimental benefit from implementation of a parity gate via qubus beams and PNR measurement under the decoherence effect.

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previous article Entanglement-assisted classical capacities of compound and arbitrarily varying quantum channels
next article Optimal probabilistic dense coding schemes
Title
Analysis of optical parity gates of generating Bell state for quantum information and secure quantum communication via weak cross-Kerr nonlinearity under decoherence effect
Authors
Jino Heo
Chang-Ho Hong
Hyung-Jin Yang
Jong-Phil Hong
Seong-Gon Choi
Publication date
01-04-2017
Publisher
Springer US
Published in
Quantum Information Processing / Issue 4/2017
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-017-1560-8
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