Network-Mediated Capacitive Coupling Drives Fast OTOC Saturation in Superconducting Circuits

Researchers have discovered that network-mediated capacitive coupling plays a significant role in the rapid saturation of out-of-time-ordered correlators (OTOC) in superconducting circuits, particularly in transmon arrays. As the capacitive connectivity increases, the system's behavior deviates substantially from the effective nearest-neighbor interacting models, which are commonly used to describe weak coupling regimes. This finding has significant implications for the design and operation of superconducting circuits, as it highlights the importance of considering the complex interactions between components¹. The study's results demonstrate that capacitive coupling can drive fast OTOC saturation, leading to a loss of quantum coherence and potentially compromising the performance of superconducting devices. This matters to practitioners because understanding these interactions is crucial for developing robust and reliable superconducting circuits, which are essential for various quantum computing and quantum information processing applications.