Quantum state discrimination 论文

详细信息

发表期刊/会议

Advances in Optics and Photonics

发表日期

2009-02-11

发表年份

2009

摘要

It is a fundamental consequence of the superposition principle for quantum states that there must exist non-orthogonal states, that is states that, although different, have a non-zero overlap. This finite overlap means that there is no way of determining with certainty in which of two such states a given physical system has been prepared. We review the various strategies that have been devised to discriminate optimally between non-orthogonal states and some of the optical experiments that have been performed to realise these.