publication . Preprint . Article . Other literature type . 2009

Spin entanglement, decoherence and Bohm's EPR paradox

Cavalcanti, Eg; Drummond, Pd; Bachor, Ha; Margaret Reid;
Open Access English
  • Published: 01 Oct 2009
Abstract
We obtain criteria for entanglement and the EPR paradox for spin-entangled particles and analyse the effects of decoherence caused by absorption and state purity errors. For a two qubit photonic state, entanglement can occur for all transmission efficiencies. In this case, the state preparation purity must be above a threshold value. However, Bohm's spin EPR paradox can be achieved only above a critical level of loss. We calculate a required efficiency of 58%, which appears achievable with current quantum optical technologies. For a macroscopic number of particles prepared in a correlated state, spin entanglement and the EPR paradox can be demonstrated using our...
Subjects
free text keywords: Quantum Physics, Atomic and Molecular Physics, and Optics, Quantum entanglement, Photon, Quantum information, Qubit, Quantum mechanics, EPR paradox, symbols.namesake, symbols, Quantum decoherence, Quantum optics, Physics, Spin-½, Condensed matter physics
23 references, page 1 of 2

[1] A. Einstein, B. Podolsky and N. Rosen,Phys. Rev. 47, 777(1935).

[2] J. S. Bell, Physics 1, 195 (1965).

[3] A. Garg and N. D. Mermin, Phys. Rev. D 35, 3831-3835 (1987).

[4] P. Skwara , H. Kampermann, H. M. Kleinmann and D. Bruss,. Phys. Rev. A 76, 012312 (2007) .

[5] P. G. Kwiat., K. Mattle, H. Weinfurter, A. Zeilinger, A. V. Sergienko and Y. Shih, Phys. Rev. Lett. 75, 4337 (1995).

[6] A. Fedrizzi, T. Herbst, T. Jenneweinand A. Zeilinger, arXiv:0706.2877 (2007).

[7] G. Toth, Phys. Rev. A 69, 052327 (2004).

[18] R. F. Werner, Phys. Rev. A 40, 4277 (1989).

[8] J. K. Korbicz, O. Ghne , M. Lewenstein, H. Hner, C. F. Roos, and R. Blatt, Phys. Rev. A 74, 052319 (2006).

[9] D. Bohm, Quantum Theory (Englewood Clis, NJ, Prentice-Hall, 1951).

[10] W. Marshall, C. Simon, R. Penroseand D. Bouwmeester, Phys. Rev. Lett. 91, 130401 (2003).

[11] N. Korolkova, G. Leuchs, R. Loudon, T. C. Ralph,and C. Silberhorn, Phys. Rev. A 65, 052306 (2002).

[12] W. P. Bowen, N. Treps, R. Schnabel and P. K. Lam, Phys. Rev. Lett. 89, 253601 (2002).

[13] W. P. Bowen, R. Schnabel, H. A. Bachor, and P. K. Lam, Phys. Rev. Lett. 88, 093601 (2002).

[14] J. Heersink, T. Gaber, S. Lorenz, O. Glockl, N. Korolkova and G. Leuchs, Phys. Rev. A 68, 013815 (2003).

23 references, page 1 of 2
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publication . Preprint . Article . Other literature type . 2009

Spin entanglement, decoherence and Bohm's EPR paradox

Cavalcanti, Eg; Drummond, Pd; Bachor, Ha; Margaret Reid;