PreprintCC BY 4.0arXiv
Reentrant d=2+1 Superfluidity at High Temperature
Abstract
We present a UV-complete model with a global U(1) symmetry in d=2+1 dimensions that exhibits a Berezinskii-Kosterlitz-Thouless (BKT) ordered phase at arbitrarily high temperatures. A careful separation of scales yields a two-dimensional Euclidean effective field theory whose construction remains perturbatively controlled even when its soft modes become strongly coupled. We determine the BKT phase boundary by carefully matching this theory to existing lattice Monte Carlo results. The high-temperature phase supports gapless static modes and algebraically decaying correlations even as T→∞.
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BibTeX
@misc{chowdhury2026reentrant,
title = {{Reentrant $d=2+1$ Superfluidity at High Temperature}},
author = {Subham Dutta Chowdhury and Joan Elias Miro},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.30236},
eprint = {2610.30236},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.30236},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Reentrant d=2+1 Superfluidity at High Temperature
AU - Subham Dutta Chowdhury
AU - Joan Elias Miro
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.30236
UR - https://arxiv.org/abs/2610.30236
AB - We present a UV-complete model with a global U(1) symmetry in d=2+1 dimensions that exhibits a Berezinskii-Kosterlitz-Thouless (BKT) ordered phase at arbitrarily high temperatures. A careful separation of scales yields a two-dimensional Euclidean effective field theory whose construction remains perturbatively controlled even when its soft modes become strongly coupled. We determine the BKT phase boundary by carefully matching this theory to existing lattice Monte Carlo results. The high-temperature phase supports gapless static modes and algebraically decaying correlations even as T→∞.
ER -