期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.157201
关键词
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资金
- Foundation for Fundamental Research on Matter (FOM)
- Netherlands Organisation for Scientific Research (NWO)
- EPSRC [EP/J014885/1, EP/I032487/1]
- Slovenian Research Agency [P1-0044, N1-0025, J1-5439]
- EPSRC [EP/I032487/1, EP/J014885/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J014885/1, EP/I032487/1] Funding Source: researchfish
In integrable many-particle systems, it is widely believed that the stationary state reached at late times after a quantum quench can be described by a generalized Gibbs ensemble (GGE) constructed from their extensive number of conserved charges. A crucial issue is then to identify a complete set of these charges, enabling the GGE to provide exact steady-state predictions. Here we solve this long-standing problem for the case of the spin-1/2 Heisenberg chain by explicitly constructing a GGE which uniquely fixes the macrostate describing the stationary behavior after a general quantum quench. A crucial ingredient in our method, which readily generalizes to other integrable models, are recently discovered quasilocal charges. As a test, we reproduce the exact postquench steady state of the Neel quench problem obtained previously by means of the Quench Action method.
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