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arXiv quant-ph/0206096quant-phcond-mat
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基于中性原子运动态的光学微阱量子计算

Quantum computing in optical microtraps based on the motional states of neutral atoms

K. Eckert, J. Mompart, X. X. Yi, J. Schliemann, D. Bruss, G. Birkl, M. Lewenstein

摘要:

我们研究了光微阱中中性原子的量子计算,其中量子比特是在原子的运动态中实现的,即,在每个陷阱的两个最低振动态中。量子门的操作是通过电子学地接近两个陷阱并允许隧穿和冷碰撞发生来执行的。我们证明了这种方案能够实现交换门的平方根,并解决了双重占用和激发其他不需要的状态的问题。我们展开的两粒子波函数在一个正交的基础上,并分析整个门的过程中的量子关联。门操作的保真度被评估为在移动陷阱的绝热性程度的函数。模拟是基于铷原子在国家的最先进的光学微陷阱与量子门实现在几十毫秒的持续时间范围。

英文摘要:

We investigate quantum computation with neutral atoms in optical microtraps where the qubit is implemented in the motional states of the atoms, i.e., in the two lowest vibrational states of each trap. The quantum gate operation is performed by adiabatically approaching two traps and allowing tunneling and cold collisions to take place. We demonstrate the capability of this scheme to realize a square-root of swap gate, and address the problem of double occupation and excitation to other unwanted states. We expand the two-particle wavefunction in an orthonormal basis and analyze quantum correlations throughout the whole gate process. Fidelity of the gate operation is evaluated as a function of the degree of adiabaticity in moving the traps. Simulations are based on rubidium atoms in state-of-the-art optical microtraps with quantum gate realizations in the few tens of milliseconds duration range.

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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