Eigenstate Thermalization in Long-Range Interacting Systems
arXiv:2111.12484 · doi:10.1103/PhysRevLett.129.030602
Abstract
Motivated by recent ion experiments on tunable long-range interacting quantum systems [B.Neyenhuis et al., Sci.Adv.3, e1700672 (2017, https://doi.org/10.1126/sciadv.1700672 )], we test the strong eigenstate thermalization hypothesis (ETH) for systems with power-law interactions . We numerically demonstrate that the strong ETH typically holds at least for systems with , which include Coulomb, monopole-dipole, and dipole-dipole interactions. Compared with short-range interacting systems, the eigenstate expectation value of a generic local observable is shown to deviate significantly from its microcanonical ensemble average for long-range interacting systems. We find that Srednicki's ansatz breaks down for at least for relatively large system sizes.
arXiv comment7 pages, 4 figures, supplemental material with 22 pages and 13 figures. The readability of the manuscript (especially the setup section)is improved. Hyperlinks are embedded
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