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arXiv 0805.3239quant-ph
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利用中性原子相干布居陷阱态进行量子计算的鲁棒系统

A robust system for Quantum Computation using Coherent Population Trap states of neutral atoms

Ashok Vudayagiri

摘要:

本文介绍了一个使用中性原子进行量子计算的鲁棒系统。该方案利用了一个多能级原子系统与两束激光相互作用,从而形成两个相干布居陷阱(CPT)态。原子布居可以在这两个CPT状态之间交替地泵浦,或者也可以形成两者的任何期望的叠加。然后,这两个CPT状态可以映射到两个量子位用于量子计算。下面解释任何期望状态的制备和CNOT门的形成。还示出了用于制备相互作用的自旋系统的1-D晶格的方案,该自旋系统模仿磁性自旋系统的行为。处于CPT态的原子不与制备它的激光相互作用,因此没有微扰。这里涉及的状态也仅由裸原子的基态组成,因此没有由于自发发射而引起的退相干。因此,这里研究的配置是一个非常强大的系统的一个很好的例子。

英文摘要:

A robust system for use of Quantum Computation using neutral atoms is presented in this communication. This scheme exploits a multilevel atomic system interacting with two lasers in such a way that it leads to formation of two Coherent Population Trap (CPT) states. The atomic population can be pumped alternatively between these two CPT states or any desired superposition of the two can also be formed. These two CPT states can then be mapped to two Qubits for Quantum Computation. Preparation of any desired state and formation of CNOT gates are explained below. A scheme for preparing 1-D lattice of mutually interacting spin systems, which mimic behaviour of magnetic spin systems is also shown. Atoms in CPT states do not interact with the lasers that prepare it and hence are free of perturbation. The states involved here are also made up of only ground states of bare atoms and hence are free of decoherence due to spontaneous emission. Thus, the configuration studied here is a good example of a very robust system.

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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