2 papers
quant-ph2005
Maps for Lorentz transformations of spin
Thomas F. Jordan, Anil Shaji, E. C. G. Sudarshan
Lorentz transformations of spin density matrices for a particle with positive mass and spin 1/2 are described by maps of the kind used in open quantum dynamics. They show how the L…
quant-ph2004
Dynamics of initially entangled open quantum systems
Thomas F. Jordan, Anil Shaji, E. C. G. Sudarshan
Linear maps of matrices describing evolution of density matrices for a quantum system initially entangled with another are identified and found to be not always completely positive…