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arXiv quant-ph/0309131quant-phcond-mat
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量子自旋网络中的理想态转移

Perfect state transfer in quantum spin networks

Matthias Christandl, Nilanjana Datta, Artur Ekert, Andrew J. Landahl

摘要:

我们提出了一类量子比特网络,它允许在固定的时间内实现任意量子态的完美传输。与许多其他量子计算和通信方案不同,这些网络不需要打开和关闭量子位耦合。当限制在N比特自旋网络的量子比特耦合相同时,我们证明了2log_3N是超立方体几何的最大完美通信距离。此外,如果允许量子位之间固定但不同的耦合,则可以在线性链中的任意长距离上实现完美的状态转移。

英文摘要:

We propose a class of qubit networks that admit perfect transfer of any quantum state in a fixed period of time. Unlike many other schemes for quantum computation and communication, these networks do not require qubit couplings to be switched on and off. When restricted to N-qubit spin networks of identical qubit couplings, we show that 2 log_3 N is the maximal perfect communication distance for hypercube geometries. Moreover, if one allows fixed but different couplings between the qubits then perfect state transfer can be achieved over arbitrarily long distances in a linear chain.

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。

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