期刊
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
卷 -, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1742-5468/2016/05/054047
关键词
slow relaxation and glassy dynamics; structural glasses (theory); thermalization; quantum quenches
资金
- Leverhulme Trust [F/00114/BG]
- EPSRC [EP/M014266/1]
- Engineering and Physical Sciences Research Council [EP/M014266/1] Funding Source: researchfish
- EPSRC [EP/M014266/1] Funding Source: UKRI
We study a quantum spin system-adapted from a facilitated spin model for classical glasses-with local bilinear interactions and without quenched disorder which seems to display characteristic signatures of a many-body localisation (MBL) transition. From direct diagonalisation of small systems, we find a change in certain dynamical and spectral properties at a critical value of a coupling, from those characteristic of a thermalising phase to those characteristic of a MBL phase. The system we consider is known to have a quantum phase transition in its ground-state in the limit of large size, related to a first-order active-to-inactive phase transition in the stochastic trajectories of an associated classical model of glasses. Our results here suggest that this first-order transition in the low-lying spectrum may influence the rest of the spectrum of the system in the large size limit. These findings may help understand the connection between MBL and structural glass transitions.
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