Symmetry protected quantum many body scars through half-gauging
Abstract
We study the interplay between symmetry defects insertion and the phenomena of quantum many body scarring. We exploit a class of models obtained from an embedding mechanism that defines a stochastic matrix form hamiltonian, hosting zero energy many body scarred states. Such models display an interesting playground to explore the consequences of dualities, half-gauging operations and so on. We first show that inside this class of models, what are the conditions to still have scared states after defect insertion. The main result of our work is a detailed analysis of half-gauging in such chains, which introduces a non-trivial interface in our system, leading to scarred states protected by the underlying symmetries. The conclusions for half-gauged scarred systems are general and may lead to fruitful directions for higher dimension scarred physics and their robustness.
Related
- Symmetry defects and gauging for quantum states with matrix product unitary symmetries
- Fate of average symmetry-protected topological states under symmetry-preserving quantum operations
- Realization of decoherence-induced averaged symmetry-protected topological phases on quantum processors
- Dressed Floquet scars from protected zero modes in a Rydberg chain
- Symmetry-protected isolation of the quantum metric in chiral type-II semi-Dirac semimetals
BibTeX
@misc{fontana2026symmetry,
title = {{Symmetry protected quantum many body scars through half-gauging}},
author = {Weslei B. Fontana and Fabrizio G. Oliviero and Yi-Ping Huang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.08304},
eprint = {2610.08304},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.08304},
}
RIS
TY - UNPB
TI - Symmetry protected quantum many body scars through half-gauging
AU - Weslei B. Fontana
AU - Fabrizio G. Oliviero
AU - Yi-Ping Huang
PY - 2026
DA - 2026/10/06
PB - arXiv
DO - 10.48550/arxiv.2610.08304
UR - https://arxiv.org/abs/2610.08304
AB - We study the interplay between symmetry defects insertion and the phenomena of quantum many body scarring. We exploit a class of models obtained from an embedding mechanism that defines a stochastic matrix form hamiltonian, hosting zero energy many body scarred states. Such models display an interesting playground to explore the consequences of dualities, half-gauging operations and so on. We first show that inside this class of models, what are the conditions to still have scared states after defect insertion. The main result of our work is a detailed analysis of half-gauging in such chains, which introduces a non-trivial interface in our system, leading to scarred states protected by the underlying symmetries. The conclusions for half-gauged scarred systems are general and may lead to fruitful directions for higher dimension scarred physics and their robustness.
ER -