869 citations · 10.9k across the 170 of their papers we have counts for
7 papers · 2 filters
Construction of quantum states with bound entanglement
Dagmar Bruss, Asher Peres
We present a new family of bound-entangled quantum states in 3x3 dimensions. Their density matrix depends on 7 independent parameters and has 4 different non-vanishing eigenvalues.
Distillability and partial transposition in bipartite systems
W. Dür, J. I. Cirac, M. Lewenstein +1
We study the distillability of a certain class of bipartite density operators which can be obtained via depolarization starting from an arbitrary one. Our results suggest that non-…
Phase covariant quantum cloning
D. Bruss, M. Cinchetti, G. M. D'Ariano +1
We consider an N -> M quantum cloning transformation acting on pure two-level states lying on the equator of the Bloch sphere. An upper bound for its fidelity is presented, by esta…
Reversible quantum teleportation in an optical lattice
Luis Santos, Dagmar Bruss
We propose a protocol, based on entanglement procedures recently suggested by [D. Jaksch et al., Phys. Rev. Lett. 82, 1975 (1999)], which allows the teleportation of an unknown sta…
Quantum entanglement and classical communication through a depolarising channel
D. Bruss, L. Faoro, C. Macchiavello +1
We analyse the role of entanglement for transmission of classical information through a memoryless depolarising channel. Using the isotropic character of this channel we prove anal…
Entanglement splitting of pure bipartite quantum states
Dagmar Bruss
The concept of entanglement splitting is introduced by asking whether it is possible for a party possessing half of a pure bipartite quantum state to transfer some of his entanglem…
Quantum Key Distribution: from Principles to Practicalities
Dagmar Bruß, Norbert Lütkenhaus
We review the main protocols for key distribution based on principles of quantum mechanics, describing the general underlying ideas, discussing implementation requirements and poin…