180 citations · 222 across the 4 of their papers we have counts for
4 papers
Geometry of depolarizing channels
Kuldeep Dixit, E. C. G. Sudarshan
Depolarizing maps acting on an N dimensional system are completely positive maps resulting into compression of the Bloch ball along the different polarization directions. In the qu…
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…
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…
Point Interactions from Flux Conservation
Luis J. Boya, E. C. G. Sudarshan
We show that the physical requirement of flux conservation can substitute for the usual matching conditions in point interactions. The study covers an arbitrary superposition of $δ…