论文标题

部分可观测时空混沌系统的无模型预测

Demonstration of a Quantum Gate using Electromagnetically Induced Transparency

论文作者

McDonnell, K., Keary, L. F., Pritchard, J. D.

论文摘要

我们演示了一个基于电磁诱导的透明度(EIT)的两个单独解决中性原子之间的本机$ \ mathrm {cnot} $门。该协议利用Rydberg状态的强大远程相互作用在封锁制度中操作时在目标量子位上启用条件状态转移。该方案的一个优点是,它可以使用独立于量子数的脉冲序列实现多量cnot $^k $门,从而为有效实现数字量子算法和稳定器测量提供了一个简单的门,以实现量子误差校正。我们实现了$ \ Mathcal {f} _ \ Mathrm {cnot}^\ Mathrm {Cor} = 0.82(6)$的损失的损失,并准备$ \ Mathcal {f} _ \ Mathrm {Bell}^\ Mathrm Mathrm limimite las in Limite las polity las polity LAS} = 0.6 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 0.66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66 = 66我们提供了许多技术改进,以将其提高到耐故障缩放所需的水平。

We demonstrate a native $\mathrm{CNOT}$ gate between two individually addressed neutral atoms based on electromagnetically induced transparency (EIT). This protocol utilizes the strong long-range interactions of Rydberg states to enable conditional state transfer on the target qubit when operated in the blockade regime. An advantage of this scheme is it enables implementation of multi-qubit CNOT$^k$ gates using a pulse sequence independent of qubit number, providing a simple gate for efficient implementation of digital quantum algorithms and stabiliser measurements for quantum error correction. We achieve a loss corrected gate fidelity of $\mathcal{F}_\mathrm{CNOT}^\mathrm{cor} = 0.82(6)$, and prepare an entangled Bell state with $\mathcal{F}_\mathrm{Bell}^\mathrm{cor} = 0.66(5)$, limited at present by laser power. We present a number of technical improvements to advance this to a level required for fault-tolerant scaling.

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