General and Optimal Scheme for Local Conversion of Pure States

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2008,（6）
• 页码范围: 1961-1963
• 页数: 3页
• 语种: 英文

摘要

We present general and optimal schemes for local conversion of pure states, via one specific example. First, we give the general solution of the doubly stochastic matrix. Then, we find the general and optimal positive-operator-valued measure (POVM) to realize the local conversion of pure states. Lastly, the physical realization of the POVM is discussed. We show that our scheme has a more general and better effect than other schemes.