Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.71.012309
Title: Quantum tomographic cryptography with Bell diagonal states: Nonequivalence of classical and quantum distillation protocols
Authors: Kaszlikowski, D. 
Lim, J.Y.
Oi, D.K.L.
Willeboordse, F.H. 
Gopinathan, A.
Kwek, L.C. 
Issue Date: 1-Jan-2005
Citation: Kaszlikowski, D., Lim, J.Y., Oi, D.K.L., Willeboordse, F.H., Gopinathan, A., Kwek, L.C. (2005-01-01). Quantum tomographic cryptography with Bell diagonal states: Nonequivalence of classical and quantum distillation protocols. Physical Review A - Atomic, Molecular, and Optical Physics 71 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.71.012309
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. © 2005 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/97711
ISSN: 10502947
DOI: 10.1103/PhysRevA.71.012309
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