Properties on the distant distribution of entanglement for arbitrary two-qubit pure states via noisy quantum channels

• 来源期刊: 中国物理B（英文版）
• 关键词: entanglement distribution quantum noisy channel concurrence
• 年，卷（期）: 2009,（4）
• 页码范围: 1357-1361
• 页数: 5页
• 语种: 英文

摘要

This paper investigates the change of entanglement for transmitting an arbitrarily entangled two-qubit pure state via one of three typical kinds of noisy quantum channels:amplitude damping quantum channel,phase damping quantum channel and depolarizing quantum channel.It finds,in all these three cases,that the output distant entanglement(measured by concurrence)reduces proportionately with respect to its initial amount,and the decaying ratio is determined only by the noisy characteristics of quantum channels and independent of the form of initial input state.