Remarks on 2-q-bit states
量子物理
2015-06-26 v1
摘要
We distinguish six classes of families of locally equivalent states in a straightforward scheme for classifying all 2-q-bit states; four of the classes consist of two subclasses each. The simple criteria that we stated recently for checking a given state's positivity and separability are justified, and we discuss some important properties of Lewenstein-Sanpera decompositions. An upper bound is conjectured for the sum of the degree of separability of a 2-q-bit state and its concurrence.
引用
@article{arxiv.quant-ph/0007053,
title = {Remarks on 2-q-bit states},
author = {Berthold-Georg Englert and Nasser Metwally},
journal= {arXiv preprint arXiv:quant-ph/0007053},
year = {2015}
}
备注
17 pages