Expanded quantum cryptographic entangling probe |
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| Authors: | Howard E Brandt John M Myers |
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| Affiliation: | 1. U.S. Army Research Laboratory , Adelphi , MD , USA hbrandt@arl.army.mil;3. U.S. Army Research Laboratory , Adelphi , MD , USA |
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| Abstract: | A generalized quantum circuit and design are given for an optimal entangling probe to be used in attacking the BB84 protocol of quantum key distribution and yielding maximum information to the probe. Probe photon polarization states become optimally entangled with the BB84 signal states on their way between the legitimate transmitter and receiver. The present design generalizes an earlier one by Brandt J. Mod. Optics 52 2177 (2005)] to include a complete range of error rates that can be induced by the probe. |
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