3 papers
quant-ph2009
Extremal Channels for a genaral Quantum system
Kuldeep Dixit, E. C. G. Sudarshan
Quantum channels can be mathematically represented as completely positive trace-preserving maps that act on a density matrix. A general quantum channel can be written as a convex s…
quant-ph2008★ 16 cited
Geometry of density sates
Luis J. Boya, Kuldeep Dixit
We reconsider the geometry of pure and mixed states in a finite quantum system. The rangesof eigenvalues of the density matrices delimit a regular simplex (Hypertetrahedron TN) in…
quant-ph2008★ 9 cited
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…