标题： 洛施密特回波，淬火到临界点后的双重单位性和广义时间熵的标度 显示英文标题

标题： Loschmidt echo, emerging dual unitarity and scaling of generalized temporal entropies after quenches to the critical point

摘要： 我们讨论如何通过使用共形场理论来预测在淬火到共形不变临界点后，计算乘积态的Loschmidt回波时所涉及的所有相关对象。我们通过张量网络验证了这一预测，结果表现出极好的一致性。特别是，我们能够预测并确认在这种非平衡情况下，观察到演化的双单位性。我们还展示了如何从这种非平衡协议中提取底层CFT的普遍信息，包括中心电荷、算符内容和广义时间熵。特别是，我们展示了使用最先进的张量网络算法进行此类计算仅需要随淬火持续时间多项式增长的资源，从而提供了一个数值上高效可解的非平衡场景示例。 显示英文摘要

摘要： We discuss how all relevant objects involved in the calculation of the Loschmidt echo of a product state after a quench to a conformal invariant critical point can be predicted by using conformal field theories. We check such prediction with tensor networks finding excellent agreement. In particular we are able to predict and confirm that in such an out-of-equilibrium scenario, we observe an emerging dual-unitarity of the evolution. We also show how to extract the universal information of the underlying CFT from such out-of-equilibrium protocol, including, the central charge, the operator content, and the generalized temporal entropies. In particular we show that using state-of-the art tensor networks algorithms such calculations only require resources that increase polynomially with the duration of the quench, thus providing an example of numerically efficiently solvable out-of-equilibrium scenario.