Eigenstate plateau transition and equilibration in one-dimensional quantum lattice models

被引:0
|
作者
Li, Wei-Han [1 ]
Saberi, Abbas Ali [1 ,2 ]
机构
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Univ Tehran, Dept Phys, POB 14395-547, Tehran, Iran
关键词
MOTT INSULATOR; SUPERFLUID; ATOMS; GAS; SIMULATIONS; STATISTICS; TRANSPORT; PHYSICS;
D O I
10.1103/PhysRevB.110.184104
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report a remarkable spectral phenomenon in a generic quantum lattice gas model. As the interaction strength increases, eigenstates spontaneously reorganize, leading to plateaus in the interaction energy. Gaps between plateaus can emerge similarly to continuous phase transitions. Our perturbation analysis indicates that, aside from these gaps, the plateau structure of the spectrum remains stable in the thermodynamic limit. The structured spectrum naturally manifests in far-from-equilibrium dynamics, exhibiting multiple stages. Our findings reveal a connection between emergent properties in high-energy states and equilibration dynamics in closed quantum systems, offering insights into the impact of interactions across the entire energy spectrum. These results directly relate to experiments probing equilibration in quantum spin systems and lattice gases.
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页数:9
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