Demonstration of a Quantum Gate Using Electromagnetically Induced Transparency.
Demonstration of a Quantum Gate Using Electromagnetically Induced Transparency.
复制标题
DOI：
10.1103/physrevlett.129.200501
复制
发表时间：
2022-04
影响因子：
8.6
通讯作者：
K. McDonnell;L. Keary;J. Pritchard
中科院分区：
文献类型：
--
作者：
K. McDonnell;L. Keary;J. Pritchard
我们展示了基于电磁感应透明的两个单独寻址的中性原子之间的原生CNOT门。该协议利用Rydberg态的强远程相互作用来实现在封锁状态下目标量子比特上的条件状态转移。该方案的一个优点是能够使用独立于量子位数的脉冲序列实现多量子位CNOT^{k}门，为有效实现数字量子算法和用于量子纠错的稳定器测量提供简单的门。我们实现了损耗校正门保真度F_{Bell}^{cor}= 0.82(6)，并制备了F_{Bell}^{cor}=0.66(5)的纠缠贝尔态，目前受激光功率限制。我们提出了许多技术改进，以将其提升到容错扩展所需的级别。
We demonstrate a native CNOT gate between two individually addressed neutral atoms based on electromagnetically induced transparency. 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 multiqubit CNOT^{k} gates using a pulse sequence independent of qubit number, providing a simple gate for efficient implementation of digital quantum algorithms and stabilizer measurements for quantum error correction. We achieve a loss corrected gate fidelity of F_{CNOT}^{cor}=0.82(6), and prepare an entangled Bell state with F_{Bell}^{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.