Dynamical equations of quantum information and Gaussian channel

✍ Scribed by Bi Qiao; H.E. Ruda; D.Z. Zhou

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 219 KB
• Volume: 363
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/j.physa.2005.08.044

✦ Synopsis

A subdynamic based kinetic equation (SKE) for quantum information density (QID) is presented and using this is shown that the Liouville equation, Master equation and Fokker-Planck equation for QID all share the same formalism as the density operator. This allows one to directly use QID for studying quantum communication and to construct a quantum Gaussian channel. The channel is described by a quantum Fokker-Planck equation, which permits harmonic oscillator encoded information to transmit quantum signals with quantum parallelism. The quantum dynamical mutual information for this channel is also calculated.