论文标题
在自由费米链中的域墙融化期间的纠缠汉密尔顿人
Entanglement Hamiltonian during a domain wall melting in the free Fermi chain
论文作者
论文摘要
我们研究了最初以域壁构型制备的一个维度的自由费米晶格气体的纠缠哈密顿量的统一时间演变。为此，我们利用了量子波动流体动力学的最新发展。我们对纠缠哈密顿量的发现是基于域壁熔化的有效现场理论描述，并有望准确地描述晶格气体的欧拉缩放率极限。但是，这种现场理论结果只能从高精度数字晶格计算中恢复，仅当在所有跳动到遥远位点的跳动中适当地求和时。
We study the unitary time evolution of the entanglement Hamiltonian of a free Fermi lattice gas in one dimension initially prepared in a domain wall configuration. To this aim, we exploit the recent development of quantum fluctuating hydrodynamics. Our findings for the entanglement Hamiltonian are based on the effective field theory description of the domain wall melting and are expected to exactly describe the Euler scaling limit of the lattice gas. However, such field theoretical results can be recovered from high-precision numerical lattice calculations only when summing appropriately over all the hoppings up to distant sites.
