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Extracting information‑bearing signal from a noisy environment has been a practical challenge in both classical and quantum computing formalism, especially in critical signal processing applications. To filter out the effect of noise, we propose a quantum smoothing filter built upon quantum formal ...  Read More>>

Response functions are a fundamental aspect of physics; they represent the link between experimental observations and the underlying quantum manybody state. However, this link is often under-appreciated, as the Lehmann formalism for obtaining response functions in linear response has no direct link ...  Read More>>

Van der Waals (vdW) assembly allows for the creation of Josephson junctions in an atomically sharp interface between two exfoliated Bi2Sr2CaCu2O8+δ(Bi-2212) flakes that are twisted relative to each other. In a narrow range of angles close to 45◦, the junction exhibits a regime where time-reversal ...  Read More>>

Advancements in thefabrication of superconducting quantum devices have highlighted tantalum as apromising material, owing to its low surface oxidation microwave loss at lowtemperatures. However, tantalum films exhibit significantly larger kineticinductances compared to materials such as aluminum or ...  Read More>>

Andreev自旋量子位最近作为一种替代量子位平台出现，其可以在半导体-超导体混合纳米线中实现。在Andreev自旋量子比特中，约瑟夫森结中的准粒子的自旋自由度本质上是与约瑟夫森结电流耦合的自旋轨道。这种相互作用可被用于 ...  Read More>>

相对于fluxonium，transmons因为易于制造一直是超导量子比特的关键优势。fluxonium量子比特由许多纳米级约瑟夫森结的环组成。然而，纳米制造的最新进展使fluxonium量子比特更容易设计。基于此。芝加哥大学的研究者Helin Zhang等人已 ...  Read More>>

量子比特由于与环境的相互作用，容易出现不同类型的错误。一种可能的纠错方案是构建固有保护的量子比特，以防止某些类型错误的出现。然而，这种方案依赖于一个条件：即对量子比特的任何量子操作都不能破坏对其构建的 ...  Read More>>

非平衡准粒子引起的关联误差是容错量子计算实现的障碍之一，准粒子可能是由于衬底中的声子引起的。隔离衬底与超导器件是解决准离子的可能有效手段。 ...  Read More>>

超导量子处理器具有硬件固有的精确控制、快速操作和现场分辨读出功能，适合用于模拟复杂量子系统，然而，许多有趣的凝聚态现象只有在电磁场存在的情况下才会出现。 ...  Read More>>

Open quantum systems interacting with an environment exhibit dynamics described by the combination of dissipation and coherent Hamiltonian evolution. Taken together, these effects are captured by a Liouvillian superoperator. The degeneracies of the (generically non-Hermitian) Liouvillian are excepti ...  Read More>>