Discrete Q- and P-symbols for spin s

Details Discrete Q- and P-symbols for spin s Discrete Q- and P-symbols for spin s

1999-06-26

arxiv.org/abs/quant-ph/9906099v1

J.Opt. B2 (2000) 118

Physics

Quantum Physics

6 pages, Latex2e

Scientific paper

Non-orthogonal bases of projectors on coherent states are introduced to expand hermitean operators acting on the Hilbert space of a spin s. It is shown that the expectation values of a hermitean operator A in a family of (2s+1)(2s+1) spin-coherent states determine the operator unambiguously. In other words, knowing the Q-symbol of A at (2s+1)(2s+1) points on the unit sphere is already sufficient in order to recover the operator. This provides a straightforward method to reconstruct the mixed state of a spin since its density matrix is explicitly parametrized in terms of expectation values. Furthermore, a discrete P-symbol emerges naturally which is related to a basis dual to the original one.

Affiliated with

Also associated with

No associations

Rating

Discrete Q- and P-symbols for spin s 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 Discrete Q- and P-symbols for spin s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discrete Q- and P-symbols for spin s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-60915