论文标题
$ n $ Qubits的最佳存储时间与一维波指导耦合
Optimal storage time for $N$ qubits coupled to a one-dimensional waveguide
论文作者
论文摘要
已知受对称保护的亚缩度可以保证在自由空间中的高量子储存时间。我们表明，在一维波指导中，这也是正确的，但是可以通过考虑Qubit-Qubit耦合矩阵的特征性来识别更长的量子存储时间。在此过程中，我们介绍了三个定理，大约是$ n $ Qubits耦合到一维波指导的：i）耦合矩阵，偶联矩阵在值分离值的连续性上是非单明的，包含点差异； ii）集体衰减速率具有对称特性，iii）与一维波导相连的Qubits的线性链表现出对称性保护的亚轻率。我们的结果将有助于设计未来量子技术的内存应用。
Symmetry-protected subradiance is known to guarantee high qubit storage times in free space. We show that in one-dimensional waveguides, this is also true, but that even longer qubit storage times can be identified by considering the eigenspectrum of the qubit-qubit coupling matrix. In the process, we introduce three theorems about $N$ qubits coupled to a one-dimensional waveguide: i) the coupling matrix, which is otherwise non-singular over a continuum of qubit separation values, contains point-singularities; ii) the collective decay rates have symmetric properties, and iii) a linear chain of qubits coupled to a one-dimensional waveguide exhibits symmetry-protected subradiance. Our results will be beneficial for designing memory applications for future quantum technologies.
