Parametrization of spin-1 classical states
Quantum Physics
2015-05-30 v1 Mesoscale and Nanoscale Physics
Quantum Gases
Abstract
We give an explicit parametrization of the set of mixed quantum states and of the set of mixed classical states for a spin--1. Classical states are defined as states with a positive Glauber-Sudarshan P-function. They are at the same time the separable symmetric states of two qubits. We explore the geometry of this set, and show that its boundary consists of a two-parameter family of ellipsoids. The boundary does not contain any facets, but includes straight-lines corresponding to mixtures of pure classical states.
Cite
@article{arxiv.1110.0325,
title = {Parametrization of spin-1 classical states},
author = {Olivier Giraud and Petr Braun and Daniel Braun},
journal= {arXiv preprint arXiv:1110.0325},
year = {2015}
}
Comments
6 pages, 2 figures