Entanglement concentration of continuous-variable quantum states

Jaromír Fiurášek, Ladislav Mišta, Radim Filip
2003 Physical Review A. Atomic, Molecular, and Optical Physics  
We propose two probabilistic entanglement concentration schemes for a single copy of two-mode squeezed vacuum state. The first scheme is based on the off-resonant interaction of a Rydberg atom with the cavity field while the second setup involves the cross Kerr interaction, auxiliary mode prepared in a strong coherent state and a homodyne detection. We show that the continuous-variable entanglement concentration allows us to improve the fidelity of teleportation of coherent states.
doi:10.1103/physreva.67.022304 fatcat:44oig5a22bbf5mjnadafvyqcsq