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Kinetically constrained freezing transition in a dipole-conserving system

Author(s): Morningstar, Alan; Khemani, Vedika; Huse, David A

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Abstract: We study a stochastic lattice gas of particles in one dimension with strictly finite-range interactions that respect the fractonlike conservation laws of total charge and dipole moment. As the charge density is varied, the connectivity of the system’s charge configurations under the dynamics changes qualitatively. We find two distinct phases: Near half filling the system thermalizes subdiffusively, with almost all configurations belonging to a single dynamically connected sector. As the charge density is tuned away from half filling there is a phase transition to a frozen phase, where locally active finite bubbles cannot exchange particles and the system fails to thermalize. The two phases exemplify what has recently been referred to as weak and strong Hilbert space fragmentation, respectively. We study the static and dynamic scaling properties of this weak-to-strong fragmentation phase transition in a kinetically constrained classical Markov circuit model, obtaining some conjectured exact critical exponents.
Publication Date: 1-Jun-2020
Electronic Publication Date: 19-Jun-2020
Citation: Morningstar, Alan, Khemani, Vedika, Huse, David A. (2020). Kinetically constrained freezing transition in a dipole-conserving system. PHYSICAL REVIEW B, 101 (10.1103/PhysRevB.101.214205
DOI: doi:10.1103/PhysRevB.101.214205
ISSN: 2469-9950
EISSN: 2469-9969
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW B
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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