arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0905.1267quant-ph
收藏

玻色耗散网络中的准完美态转移

Quasi-perfect state transfer in a bosonic dissipative network

A. Cacheffo, M. A. de Ponte, M. H. Y. Moussa, A. S. M. de Castro

摘要:

本文提出了耗散谐振子网络中准理想态转移的一个方案。我们考虑理想的发送器和接收器振荡器连接的非理想的发送器振荡器耦合的最近邻共振链。从描述网络状态演化的动力学量的代数性质,我们推导出一个标准,固定所有振荡器之间的耦合强度,除了它们的固有频率,使理想的发射机振荡器的特殊情况下,完美的状态转移。我们的标准提供了一个易于操作的公式,使完美的状态转移的特殊情况下,网络的非理想性被忽视。通过调整发送器和接收器振荡器的共同频率与发送器的谐振,我们证明了发送器的状态隧道接收器振荡器通过虚拟激励非理想的发送器链。这个虚拟过程使得与发射器线路相关联的衰减率可以忽略,代价是延迟状态转移过程的时间间隔。除了我们的分析结果,数值计算来说明我们的协议。

英文摘要:

In this paper we propose a scheme for quasi-perfect state transfer in a network of dissipative harmonic oscillators. We consider ideal sender and receiver oscillators connected by a chain of nonideal transmitter oscillators coupled by nearest-neighbor resonances. From the algebraic properties of the dynamical quantities describing the evolution of the network state, we derive a criterion, fixing the coupling strengths between all the oscillators, apart from their natural frequencies, enabling perfect state transfer in the particular case of ideal transmitter oscillators. Our criterion provides an easily manipulated formula enabling perfect state transfer in the special case where the network nonidealities are disregarded. By adjusting the common frequency of the sender and the receiver oscillators to be out of resonance with that of the transmitters, we demonstrate that the sender's state tunnels to the receiver oscillator by virtually exciting the nonideal transmitter chain. This virtual process makes negligible the decay rate associated with the transmitter line on the expenses of delaying the time interval for the state transfer process. Apart from our analytical results, numerical computations are presented to illustrate our protocol.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑