Phys. Rev. A 72, 022313 (2005) [7 pages]Experimental investigation of quantum key distribution with position and momentum of photon pairsReceived 25 November 2004; revised 6 May 2005; published 15 August 2005 We investigate the utility of Einstein-Podolsky-Rosen correlations of the position and momentum of photon pairs from parametric down-conversion in the implementation of a secure quantum key distribution protocol. We show that security is guaranteed by the entanglement between down-converted pairs, and can be checked by either direct comparison of Alice and Bob’s measurement results or evaluation of an inequality of the sort proposed by Mancini et al. Phys. Rev. Lett. 88 120401 (2002)]. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.022313
DOI:
10.1103/PhysRevA.72.022313
PACS:
03.67.Dd, 42.50.Ar, 42.25.Kb
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.