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Volumn 58, Issue 4, 1998, Pages R2623-R2626

Embedded Bell-state analysis

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Indexed keywords


EID: 0001442610     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.58.R2623     Document Type: Article
Times cited : (323)

References (45)
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    • See, for instance, special issue of Proc. R. Soc. London, Ser. A 454, 1969 (1998)
    • See, for instance, special issue of Proc. R. Soc. London, Ser. A 454, 1969 (1998).
  • 12
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    • Of course, there is no problem if one has many pairs in a given state. The difficulty arises when a definitive result must be obtained from a single system
    • Of course, there is no problem if one has many pairs in a given state. The difficulty arises when a definitive result must be obtained from a single system.
  • 16
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    • While Ref
    • While Ref. 6 does contain a method for distinguishing four orthogonal states, these are states in which two degrees of freedom (polarization and spatial mode) of a single photon are (formally) in an entangled state; the method would not work for the problem considered here, namely, determining the joint polarization Bell state of two photons.
  • 19
    • 85037197131 scopus 로고    scopus 로고
    • The down-conversion photon pairs are known to be tightly correlated in time, to within tens of femtoseconds. The underlying time-energy entanglement of the two photons in turn arises from energy conservation; although either of them individually has a large spectral bandwidth, the sum of their energies is essentially a fixed constant, equal to the energy of the pump laser photons
    • The down-conversion photon pairs are known to be tightly correlated in time, to within tens of femtoseconds. The underlying time-energy entanglement of the two photons in turn arises from energy conservation; although either of them individually has a large spectral bandwidth, the sum of their energies is essentially a fixed constant, equal to the energy of the pump laser photons.
  • 20
    • 85037207010 scopus 로고    scopus 로고
    • One would thus need a quartz slab (Formula presented) thick to obtain sufficient birefringence. Alternatively, one could simply separate the (Formula presented) and (Formula presented) polarizations by a polarizing beam splitter, delay one polarization along an arm longer than 30 cm, and recombine the beams at a second polarizing beam splitter
    • One would thus need a quartz slab (Formula presented) thick to obtain sufficient birefringence. Alternatively, one could simply separate the (Formula presented) and (Formula presented) polarizations by a polarizing beam splitter, delay one polarization along an arm longer than 30 cm, and recombine the beams at a second polarizing beam splitter.
  • 26
    • 85037220088 scopus 로고    scopus 로고
    • If adjacent pulses from a mode-locked laser would be used to pump the down-conversion process, then the necessary coherence would be available again, provided (Formula presented) equals the pulse repetition time
    • If adjacent pulses from a mode-locked laser would be used to pump the down-conversion process, then the necessary coherence would be available again, provided (Formula presented) equals the pulse repetition time.
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    • Momentum-entangled states that were not also polarization-entangled have already been observed using down-conversion photons; J. G. Rarity and P. R. Tapster, Phys. Rev. Lett. 64, 2495 (1990).
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    • Rarity, J.G.1    Tapster, P.R.2
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    • Clearly, one could emulate similar behavior by actually using a network of beam splitters or fiber splitters, directed to an array of standard avalanche photodiodes. For a large number of elements, the chance that two photons would travel to the same detector becomes neglible
    • Clearly, one could emulate similar behavior by actually using a network of beam splitters or fiber splitters, directed to an array of standard avalanche photodiodes. For a large number of elements, the chance that two photons would travel to the same detector becomes neglible.
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    • Delft Electronische Producten (DEP), P.O. Box 60, 9300 AB Roden, The Netherlands
    • Delft Electronische Producten (DEP), P.O. Box 60, 9300 AB Roden, The Netherlands;
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    • P. G. Kwiat, J. R. Mitchell, P. D. D. Schwindt, and A. G. White, in Proceedings of the Fourth International Conference on Quantum Communication, Measurement and Computing, Illinois, 1998, edited by Prem Kumar et al. (Plenum, New York, in press)
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.