Tomographic Quantum Cryptography: Equivalence of Quantum and Classical Key Distillation
(2003)
Local implementation of witness operators for entanglement detection
Institute of Electrical and Electronics Engineers (IEEE) (2003) 418
Quantum cryptography based on qutrit Bell inequalities
Physical Review A - Atomic, Molecular, and Optical Physics 67:1 (2003)
Abstract:
A crytographic protocol using qutrits which is resistant to a form of symmetric, incoherent attacks is presented. The qutrit Bell inequality provides a sufficient condition for secure communication. The protocol tolerates 33.7% noise, whereas it is 29.2% for E91 or BB84 protocol.On direct detection of entanglement properties of unknown states
(2003) 7-12
Abstract:
The recent development of methods for detecting entanglement of unknown quantum state is described. In particular, the fundamental limitations due to the linearity of quantum mechanics axe discussed. Then both qualitative and quantitative methods of entanglement detection are shortly presented.Singularities of the mixed state phase (multiple letters)
Physical Review Letters 89:26 (2002)