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Entanglement-Assisted Entanglement Purification
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-07-21 , DOI: 10.1103/physrevlett.127.040502 F Riera-Sàbat 1 , P Sekatski 2 , A Pirker 1 , W Dür 1
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-07-21 , DOI: 10.1103/physrevlett.127.040502 F Riera-Sàbat 1 , P Sekatski 2 , A Pirker 1 , W Dür 1
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The efficient generation of high-fidelity entangled states is the key element for long-distance quantum communication, quantum computation, and other quantum technologies, and at the same time the most resource-consuming part in many schemes. We present a class of entanglement-assisted entanglement purification protocols that can generate high-fidelity entanglement from noisy, finite-size ensembles with improved yield and fidelity as compared to previous approaches. The scheme utilizes high-dimensional auxiliary entanglement to perform entangling nonlocal measurements and determine the number and positions of errors in an ensemble in a controlled and efficient way, without disturbing the entanglement of good pairs. Our protocols can deal with arbitrary errors, but are best suited for few errors, and work particularly well for decay noise. Our methods are applicable to moderately sized ensembles, as will be important for near term quantum devices.
中文翻译：
纠缠辅助纠缠纯化
高保真纠缠态的高效产生是长距离量子通信、量子计算等量子技术的关键要素，同时也是许多方案中最耗费资源的部分。我们提出了一类纠缠辅助纠缠纯化协议，与以前的方法相比，它可以从嘈杂的、有限尺寸的集合中产生高保真纠缠，并提高产量和保真度。该方案利用高维辅助纠缠来执行纠缠非局部测量，并以受控且有效的方式确定集合中错误的数量和位置，而不会干扰良好对的纠缠。我们的协议可以处理任意错误，但最适合少数错误，并且特别适用于衰减噪声。
更新日期：2021-07-21
中文翻译：
纠缠辅助纠缠纯化
高保真纠缠态的高效产生是长距离量子通信、量子计算等量子技术的关键要素，同时也是许多方案中最耗费资源的部分。我们提出了一类纠缠辅助纠缠纯化协议，与以前的方法相比，它可以从嘈杂的、有限尺寸的集合中产生高保真纠缠，并提高产量和保真度。该方案利用高维辅助纠缠来执行纠缠非局部测量，并以受控且有效的方式确定集合中错误的数量和位置，而不会干扰良好对的纠缠。我们的协议可以处理任意错误，但最适合少数错误，并且特别适用于衰减噪声。
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