2013/09/30 by F. S. Luiz, F.S. Luiz, Gustavo Rigolin · 1 citation
Computer Science · Physics and Astronomy · #Alice and Bob #Beam splitter #Coherent states #Continuous variable #Fidelity #Protocol (science) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cloning #Quantum teleportation #Teleportation #Variable (mathematics) #quant-ph
paper · pdf · doi:10.1016/j.aop.2015.01.002
published as Annals of Physics 354, 409 (2015) · v1: 16 pages, double column, 24 figures, revTex4; v2: published version
openalex publication_date 2015/01/10 · arxiv created 2015/02/04 · arxiv updated 2015/02/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show the optimal setup that allows Alice to teleport coherent states to Bob giving the greatest fidelity (efficiency) when one takes into account two realistic assumptions. The first one says that in any actual implementation of the continuous variable teleportation protocol (CVTP) Alice and Bob necessarily share non-maximally entangled states (two-mode finitely squeezed states). The second one assumes that Alice's pool of possible coherent states to be teleported to Bob does not cover the whole complex plane. The optimal strategy is achieved by tuning three parameters in the original CVTP, namely, the beam splitter transmittance and the displacements in position and momentum implemented on the teleported state. These slight changes in the protocol are currently easy to be implemented and, as we show, give considerable gain in perfomance for a variety of possible pool of input states with Alice.