Simple Scheme for Directly Measuring Concurrence of Two-Qubit Pure States in One Step

• 来源期刊: 理论物理通讯(英文版)
• 年，卷（期）: 2009,（2）
• 页码范围: 252-254
• 页数: 3页
• 语种: 英文

摘要

In the present work, a simple scheme for the direct measurement of the concurrence of two-qubit pure states is proposed.The scheme is based on trapped ions and only needs one step when the two identical pure states are given.The vibrational mode in our proposal is only virtually excited, which is important in view of decoherence.Furthermore, the scheme is feasible based on current technologies.