摘要
为混合纠缠的状态的一个纠纷纯化协议在一个 superconducing 传播线共鸣器(TLR ) 内经由两倍量点分子被介绍。在当前的情形，为任意的双量点分子联合能被控制切开的 qubit 水平在大 detuning 区域经由 TLR 调节。TLR 总是空、仅仅几乎激动，因此相互作用对 TLR 腐烂和热地感觉迟钝。关于我们的计划的可行性的讨论证明纠纷纯化能与高保真度和成功的概率被实现。
An entanglement purification protocol for mixed entangled states is presented via double quantum dot molecules inside a superconducing transmission line resonator （TLR）. In the current scenario, coupling for arbitrary double quantum dot molecules can be tuned via the TLR in the large detuning region by controlling the qubit level splitting. The TLR is always empty and only virtually excited, so the interaction is insensitive to both the TLR decay and thermal field. Discussion about the feasibility of our scheme shows that the entanglement purification can be implemented with high fidelity and successful probability.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 60678022 and 10704001, the Specialized Research Pund for the Doctoral Program of Higher Education under Grant No 20060357008, the Key Program of the Education Department of Anhui Province under Grant Nos KJ2009A048Z, the Talent Project of the Anhui Province for Outstanding Youth under Grant Nos 2010SQRL153ZD and 2010SQRL187.
关键词
双量子点分子
纠缠纯化
谐振器
输电线路
混合
TLR
任意耦合
能级分裂
Superconductivity Computational physics Surfaces, interfaces and thin films Nanoscale science and low-D systems Quantum information and quantum mechanics
