Sending Quantum Information with Gaussian States
Alexander Semenovich Holevo · Kluwer Academic Publishers eBooks · 2005
Quantum information characteristics, such as quantum mutual information, loss, noise and coherent information are explicitly calculated for Bosonic attenuation/amplification channel with input Gaussian state. The coherent information is shown to be negative for the values of the attenuation coefficient \( k < 1\sqrt 2 \).