153 citations · 183 across the 4 of their papers we have counts for
7 papers
Subsonic critical velocity at finite temperature
Patrick Navez, Robert Graham
Based on the dielectric formalism in the generalised random phase approximation, we generalise the description of a Bose condensed gas to allow for a relative velocity between the…
Cloning quantum entanglement in arbitrary dimensions
E. Karpov, P. Navez, N. J. Cerf
We have found a quantum cloning machine that optimally duplicates the entanglement of a pair of -dimensional quantum systems. It maximizes the entanglement of formation containe…
The optimal cloning of quantum coherent states is non-Gaussian
N. J. Cerf, O. Krueger, P. Navez +2
We consider the optimal cloning of quantum coherent states with single-clone and joint fidelity as figures of merit. Both optimal fidelities are attained for phase space translatio…
Collisionless dynamics of the condensate predicted in the random phase approximation
Patrick Navez
From the microscopic theory, we derive a number conserving quantum kinetic equation, valid for a dilute Bose gas at any temperature, in which the binary collisions between the quas…
A " quantum public key " based cryptographic scheme for continuous variables
Patrick Navez, Alessandra Gatti, Luigi A. Lugiato
By analogy to classical cryptography, we develop a "quantum public key" based cryptographic scheme in which the two public and private keys consist in each of two entangled beams o…
Spatial entanglement of twin quantum images
Enrico Brambilla, Alessandra Gatti, Patrick Navez +1
We show that spatial entanglement of two twin images obtained by parametric down-conversion is complete, i.e. concerns both amplitude and phase. This is realised through a homodyne…