论文标题
共同编码的Rydberg Qubit的鲁棒性
The Robustness of a Collectively Encoded Rydberg Qubit
论文作者
论文摘要
我们根据$ n $纠缠的原子的合奏中存储的单个rydberg激发，演示了一个集体编码的量子。量子旋转是通过应用rydberg状态之间刺激的微波场进行的。连贯的读取是通过将激发映射到单个光子中进行的。拉姆西干涉法用于探测量子的连贯性，并测试对外部扰动的鲁棒性。我们表明，即使我们从极化模式损失原子，也可以保留量子线相干性，从而保留了Ramsey边缘的可见性。我们表明，由于电场噪声尺度作为场振幅的第四次功率而引起的DEPHASS。这些结果表明，可以通过使用Rydberg Polaritons进行集体编码来实现强大的量子信息处理，因此该系统可以为量子计算和网络提供有吸引力的替代编码策略。
We demonstrate a collectively-encoded qubit based on a single Rydberg excitation stored in an ensemble of $N$ entangled atoms. Qubit rotations are performed by applying microwave fields that drive excitations between Rydberg states. Coherent read-out is performed by mapping the excitation into a single photon. Ramsey interferometry is used to probe the coherence of the qubit, and to test the robustness to external perturbations. We show that qubit coherence is preserved even as we lose atoms from the polariton mode, preserving Ramsey fringe visibility. We show that dephasing due to electric field noise scales as the fourth power of field amplitude. These results show that robust quantum information processing can be achieved via collective encoding using Rydberg polaritons, and hence this system could provide an attractive alternative coding strategy for quantum computation and networking.
