Positive Maps Which Are Not Completely Positive

Details Positive Maps Which Are Not Completely Positive Positive Maps Which Are Not Completely Positive

2000-01-14

arxiv.org/abs/quant-ph/0001053v1

Physics

Quantum Physics

4pages,The Institute of Theoretical Physics, Academia Sinica, Beijing 100080, P.R. China

Scientific paper

10.1103/PhysRevA.62.024302

The concept of the {\em half density matrix} is proposed. It unifies the quantum states which are described by density matrices and physical processes which are described by completely positive maps. With the help of the half-density-matrix representation of Hermitian linear map, we show that every positive map which is not completely positive is a {\em difference} of two completely positive maps. A necessary and sufficient condition for a positive map which is not completely positive is also presented, which is illustrated by some examples.

Affiliated with

Also associated with

No associations

Rating

Positive Maps Which Are Not Completely Positive does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Positive Maps Which Are Not Completely Positive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positive Maps Which Are Not Completely Positive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-700972