开放Schwinger模型中介子与热介质的热化
Meson thermalization with a hot medium in the open Schwinger model
AI总结：
本文利用张量网络算法研究开放格点Schwinger模型中介子在热介质里的热化动力学，模拟多达100个格点并保持电场宇称对称性，揭示了热化时间随耗散、温度、背景电场和费米子质量增大而增加的规律。
摘要：
被视为开放量子系统的量子场论为研究现实实验场景提供了关键框架，例如夸克偶素穿过大型强子对撞机产生的夸克-胶子等离子体。在此类情况下，捕捉复杂的热化过程需要详细理解粒子如何在热介质中演化和相互作用。考虑开放格点Schwinger模型并使用张量网络算法，我们研究了介子粒子（如Schwinger玻色子或电通量弦）在热介质中的热化动力学。我们模拟了多达100个格点位的系统，实现了电场宇称对称性的精确保持，证明了算法的鲁棒性和可扩展性。我们的结果表明，热化时间随着环境耗散增强、环境温度升高、背景电场增大以及费米子质量增大而增加。此外，我们研究了连接介子组分粒子的通量弦两半之间的量子互信息，并分析了其与相关动力学可观测量之间的关系。
英文摘要：
Quantum field theories treated as open quantum systems provide a crucial framework for studying realistic experimental scenarios, such as quarkonia traversing the quark-gluon plasma produced at the Large Hadron Collider. In such cases, capturing the complex thermalization process requires a detailed understanding of how particles evolve and interact with a hot medium. Considering the open lattice Schwinger model and using tensor network algorithms, we investigate the thermalization dynamics of mesonic particles in a hot medium, such as the Schwinger boson or the electric flux string. We simulate systems with up to 100 lattice sites, achieving accurate preservation of the electric field parity symmetry, demonstrating the algorithm's robustness and scalability. Our results reveal that the thermalization time increases with stronger dissipation from the environment, increasing environment temperature, higher background electric field and heavier fermion masses. Further, we study the quantum mutual information between the two halves of the flux string connecting a meson's constituent particles and analyze its relation to relevant dynamical observables.
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