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arXiv 2007.06768quant-ph
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横向运动受噪声影响的独立寻址原子量子比特上的量子门

Quantum Gates on Individually-Addressed Atomic Qubits Subject to Noisy Transverse Motion

M. Cetina, L. N. Egan, C. A. Noel, M. L. Goldman, A. R. Risinger, D. Zhu, D. Biswas, C. Monroe

摘要:

单个捕获的原子量子位代表了最有前途的量子计算机技术之一,因为它们的空闲误差可以忽略不计,并且能够通过聚焦光场实现全套可重构门操作。然而,量子门操作的保真度会受到横向于激光的原子的弱约束的限制。我们目前的测量这种效果,通过执行单独寻址纠缠门链中的最多25个被困的原子离子,弱限制沿链轴。我们提出了一个模型,准确地描述了所观察到的退相干从由嘈杂的电场引起的离子的残余加热。我们建议通过使用散布在链中的辅助离子来同情地冷却整个量子线路中的量子比特离子来抑制这些效应。

英文摘要:

Individual trapped atomic qubits represent one of the most promising technologies to scale quantum computers, owing to their negligible idle errors and the ability to implement a full set of reconfigurable gate operations via focused optical fields. However, the fidelity of quantum gate operations can be limited by weak confinement of the atoms transverse to the laser. We present measurements of this effect by performing individually-addressed entangling gates in chains of up to 25 trapped atomic ions that are weakly confined along the chain axis. We present a model that accurately describes the observed decoherence from the residual heating of the ions caused by noisy electric fields. We propose to suppress these effects through the use of ancilla ions interspersed in the chain to sympathetically cool the qubit ions throughout a quantum circuit.

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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