The physical meaning of phase and its importance for quantum teleportation

Journal of Modern Optics

Volumn 48, Issue 13 SPEC., 2001, Pages 2049-2054

  Van Enk, S J ^a  

^a LUCENT TECHNOLOGIES   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMMUNICATION CHANNELS (INFORMATION THEORY); EIGENVALUES AND EIGENFUNCTIONS; GROUND STATE; HAMILTONIANS; LIGHT POLARIZATION; NETWORK PROTOCOLS; PHOTONS; QUANTUM OPTICS;

CLASSICAL COMMUNICATION CHANNEL; EIGENSTATES; ENTANGLED STATE; QUANTUM TELEPORTATION;

OPTICAL COMMUNICATION;

EID: 0035841907     PISSN: 09500340     EISSN: None     Source Type: Journal    
DOI: 10.1080/09500340110065763     Document Type: Article

References (12)

1. BENNETT, C. H., BRASSARD, H. G., CREPEAU, C,. JOZSA, R., PERES, A., and WOOTTERS, W. K., 1993, Phys. Rev. Lett., 70, 1895.
2. BOSCHI, D., BRANCA, S., DE MARTINI, F., HARDY, L., and POPESCU, S., 1998, Phys. Rev. Lett., 80, 1121.
3. BOUWMEESTER, D., PAN, J. W., MATTLE, K., EIBL, M., WEINFURTER, H., and ZEILINGER, A., 1997, Nature, 390, 575.
4. FURUSAWA, A., SØRENSON, J. L., BRAUNSTEIN, S. L., FUCHS, C. A., KIMBLE, H. J., and POLZIK, E. S., 1998, Science, 282, 706.
5. This raises several interesting questions (John Smolin, private communication), that are not discussed further here, such as: If one wishes to teleport N quantum states, what is the overall teleportation fidelity for the whole ensemble if one used M known states to establish an isomorphism? What is the answer in the asymptotic limit of N, M → ∞? Can one reach perfect fidelity while letting the ratio M/N go to zero? If not, can M/N < 1 asymptotically in this case?
6. If there is a guarantee that Alice's and Bob's qubit bases do not change in time after they established the isomorphism and the entangled state with their quantum channel, then a phase standard would not be necessary. But of course this begs the question where the guarantee came from.
7. BRAUNSTEIN, S. L., and LO, H.-K., (eds), 2000, Fortschritte der Physik 48, nr. 9-11, Special issue on experimental proposals for quantum computation.
8. RUDOLPH, T., and SANDERS, B. C., quant-ph/0103147.
9. VAN ENK, S. J., and FUCHS, C. A., quant-ph/0104036.
10. PARKINS, A. S., and KIMBLE. H. J., 1999, J. Opt. B, 1, 496.
11. JOZSA, R., ABRAMS, D. S., DOWLING, J. P., and WILLIAMS, C. P., 2000, Phys. Rev. Lett., 85, 2010; E. A. Burt, C. R. Ekstrom and T. B. Swanson, quant-ph/0007030; M. S. Shahriar, quant-ph/0010007; U. Yurtsever and J. P. Dowling, quant-ph/0010097; J. Preskill, quant-ph/0010098.
12. CHUANG, I., 2000, Phys. Rev. Lett., 85, 2006.