메뉴 건너뛰기




Volumn 92, Issue 13, 2004, Pages

Maximally entangled mixed states: Creation and concentration

Author keywords

[No Author keywords available]

Indexed keywords

BIREFRINGENCE; COHERENT LIGHT; ELECTRON ENERGY LEVELS; ENTROPY; MATRIX ALGEBRA; OPTICAL PROPERTIES; PARAMETER ESTIMATION; PHOTONS; POLARIZATION;

EID: 2342571478     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.92.133601     Document Type: Article
Times cited : (144)

References (39)
  • 2
    • 0036013605 scopus 로고    scopus 로고
    • Focus on Quantum Cryptography
    • N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, Rev. Mod. Phys. 74, 145 (2002); Focus on Quantum Cryptography, New J. Phys. 4, 41 (2002).
    • (2002) New J. Phys. , vol.4 , pp. 41
  • 9
    • 85032428260 scopus 로고    scopus 로고
    • note
    • After [7], we use "concentration" to indicate an increase of both purity and entanglement.
  • 21
    • 85032427970 scopus 로고    scopus 로고
    • note
    • Note that for certain entanglement and mixedness parametrizations, the Werner states are the MEMS [21].
  • 22
    • 0038303067 scopus 로고    scopus 로고
    • T. C. Wei et al., Phys. Rev. A 67, 022110 (2003).
    • (2003) Phys. Rev. A , vol.67 , pp. 022110
    • Wei, T.C.1
  • 23
    • 85032426458 scopus 로고    scopus 로고
    • P. Kwiat et al., quant-ph/0303040
    • P. Kwiat et al., quant-ph/0303040.
  • 25
  • 26
    • 0038485625 scopus 로고    scopus 로고
    • J. W. Pan, C. Simon, Č. Brukner, and A. Zeilinger, Nature (London) 410, 1067 (2001); J. W. Pan et al., Nature (London) 423, 417 (2003); Z. Zhao et al., Phys. Rev. Lett. 90, 207901 (2003).
    • (2003) Nature (London) , vol.423 , pp. 417
    • Pan, J.W.1
  • 27
    • 0038422942 scopus 로고    scopus 로고
    • J. W. Pan, C. Simon, Č. Brukner, and A. Zeilinger, Nature (London) 410, 1067 (2001); J. W. Pan et al., Nature (London) 423, 417 (2003); Z. Zhao et al., Phys. Rev. Lett. 90, 207901 (2003).
    • (2003) Phys. Rev. Lett. , vol.90 , pp. 207901
    • Zhao, Z.1
  • 29
    • 4243684526 scopus 로고    scopus 로고
    • W. K Wootters, Phys. Rev. Lett. 80, 2245 (1998); V. Coffman, J. Kundu, and W. K. Wooters, Phys. Rev. A 61, 052306 (2000).
    • (1998) Phys. Rev. Lett. , vol.80 , pp. 2245
    • Wootters, W.K.1
  • 32
    • 85032429206 scopus 로고    scopus 로고
    • note
    • The optical path length difference of the decoherers is not generally exactly 140λ, causing an extra phase on the off-diagonal elements. The phase is set to zero by slightly tipping one of the decoherers about its vertical axis.
  • 33
    • 85032428870 scopus 로고    scopus 로고
    • B.A. thesis, Dartmouth College, also quant-ph/0010001;
    • A. J. Berglund, B.A. thesis, Dartmouth College, 2000; also quant-ph/0010001; N. Peters et al., J. Quant. Inf. Comp. 3, 503 (2003).
    • (2000)
    • Berglund, A.J.1
  • 34
    • 2342467162 scopus 로고    scopus 로고
    • A. J. Berglund, B.A. thesis, Dartmouth College, 2000; also quant-ph/0010001; N. Peters et al., J. Quant. Inf. Comp. 3, 503 (2003).
    • (2003) J. Quant. Inf. Comp. , vol.3 , pp. 503
    • Peters, N.1
  • 35
    • 85032426585 scopus 로고    scopus 로고
    • note
    • As recently demonstrated [M. Barbieri, F. De Martini, G. Di Nepi, and P. Mataloni, quant-ph/0303018; G. Di Nepi, F. De Martini, M. Barbieri, and P. Mataloni, quant-ph/0307204], one could instead use the spatial degree of freedom to induce decoherence; however, the states are then not suitable, e.g., for use in fiber optic systems, or where interference methods are needed.
  • 37
    • 85032430627 scopus 로고    scopus 로고
    • note
    • 2-4).
  • 38
    • 85032428105 scopus 로고    scopus 로고
    • note
    • In "twirling," a random SU(2) rotation is independently performed on each photon pair.
  • 39
    • 85032428454 scopus 로고    scopus 로고
    • note
    • Because it is presently very difficult to produce simultaneous indistinguishable pairs of photons, the filtration technique is much more efficient, e.g., where typically 20% of our incident ensemble of pairs survived, less than 0.005% would survive (estimated from the twofold and fourfold coincidence data reported in [24]) in the interference schemes, which require four photons.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.