标题： 准粒子的体积定律纠缠碎片化 显示英文标题

标题： Volume-law entanglement fragmentation of quasiparticles

摘要： 我们研究了准粒子态中的纠缠熵，其中某些单位模式在动量空间中被反复和顺序激发。 我们发现，在标度极限下，每个单位模式独立且普遍地对纠缠做出贡献，导致纠缠熵的体积定律标度。 这种体积定律纠缠碎片化的特性在费米子和玻色子链中得到了数值确认。 我们推导出了一个适用于费米子的解析公式，该公式通过适当的识别也可以应用于自旋-1/2 XXZ链。 显示英文摘要

摘要： We study the entanglement entropy in quasiparticle states where certain unit patterns are excited repeatedly and sequentially in momentum space. We find that in the scaling limit, each unit pattern contributes independently and universally to the entanglement, leading to a volume-law scaling of the entanglement entropy. This characteristic of volume-law entanglement fragmentation is numerically confirmed in both fermionic and bosonic chains. We derive an analytical formula for fermions, which can also be applied to the spin-1/2 XXZ chain with appropriate identifications.