Quantum tomographic cryptography with Bell diagonal states: nonequivalence of classical and quantum distillation protocols

D Kaszlikowski, J Y Lim, D K L Oi, F H Willeboordse, A Gopinathan, L C Kwek

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We present a generalized tomographic quantum key distribution protocol in which the two parties share a Bell diagonal mixed state of two qubits. We show that if an eavesdropper performs a coherent measurement on many quantum ancilla states simultaneously, classical methods of secure key distillation are less effective than quantum entanglement distillation protocols. We also show that certain classes of Bell diagonal states are resistant to any attempt at incoherent eavesdropping.

LanguageEnglish
Article number012309
Pages-
Number of pages8
JournalPhysical Review A
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 2005

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quantum cryptography
distillation
bells

Keywords

  • quantum systems
  • tomographic cryptography
  • quantum distillation protocols

Cite this

Kaszlikowski, D ; Lim, J Y ; Oi, D K L ; Willeboordse, F H ; Gopinathan, A ; Kwek, L C . / Quantum tomographic cryptography with Bell diagonal states: nonequivalence of classical and quantum distillation protocols. In: Physical Review A. 2005 ; Vol. 71, No. 1. pp. -.
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Quantum tomographic cryptography with Bell diagonal states: nonequivalence of classical and quantum distillation protocols. / Kaszlikowski, D ; Lim, J Y ; Oi, D K L ; Willeboordse, F H ; Gopinathan, A ; Kwek, L C .

In: Physical Review A, Vol. 71, No. 1, 012309, 01.2005, p. -.

Research output: Contribution to journalArticle

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AU - Gopinathan, A

AU - Kwek, L C

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