Lieb-Schultz-Mattis-type constraints on fractonic matter
Abstract
The Lieb-Schultz-Mattis (LSM) theorem and its descendants impose strong constraints on the low-energy behavior of interacting quantum systems. In this paper, we formulate LSM-type constraints for lattice translation invariant systems with generalized U(1) symmetries which have recently appeared in the context of fracton phases: U(1) polynomial shift and subsystem symmetries. Starting with a generic interacting system with conserved dipole moment, we examine the conditions under which it supports a symmetric, gapped, and nondegenerate ground state, which we find requires that both the filling fraction and the bulk charge polarization take integer-values. Similar constraints are derived for systems with higher moment conservation laws or subsystem symmetries, in addition to lower bounds on the ground-state degeneracy when certain conditions are violated. Finally, we discuss the mapping between LSM-type constraints for subsystem symmetries and the anomalous symmetry action at boundaries of subsystem symmetric topological (SSPT) states.
- Publication:
-
Physical Review B
- Pub Date:
- April 2020
- DOI:
- 10.1103/PhysRevB.101.165145
- arXiv:
- arXiv:1912.10520
- Bibcode:
- 2020PhRvB.101p5145H
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons;
- Quantum Physics
- E-Print:
- 15 pages, 1 figure