Effective theory of the hidden-order pseudogap phase in a doped antiferromagnet
Abstract
The microscopic origin of the pseudogap phase constitutes a longstanding puzzle related to the emergence of high-temperature superconductivity in cuprate materials. In this work, we develop an effective model for doped antiferromagnets in terms of fluctuating stripes, or string-like domain walls, which obscure the antiferromagnetic order of the spin background. The open ends of such domain walls of the N'eel order are treated as vortices in the resulting lattice gauge theory. We numerically evaluate the phase diagram by classical Monte Carlo simulations, using percolation-based geometric order parameters to diagnose hidden N'eel order. At high temperatures, we identify a BKT-type crossover in which the domain wall ends become deconfined. We interpret this as the T* crossover from the hidden order regime to the paramagnetic metal above. At low temperatures, we identify stripe instabilities. Predictions of our effective model can be tested in ultracold fermion quantum simulators.
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BibTeX
@misc{paciani2026effective,
title = {{Effective theory of the hidden-order pseudogap phase in a doped antiferromagnet}},
author = {Gaia De Paciani and Gesa Dünnweber and Johannes Poersch and Simon M. Linsel and Henning Schlömer and Fabian Grusdt},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.13391},
eprint = {2609.13391},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.13391},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Effective theory of the hidden-order pseudogap phase in a doped antiferromagnet
AU - Gaia De Paciani
AU - Gesa Dünnweber
AU - Johannes Poersch
AU - Simon M. Linsel
AU - Henning Schlömer
AU - Fabian Grusdt
PY - 2026
DA - 2026/09/11
PB - arXiv
DO - 10.48550/arxiv.2609.13391
UR - https://arxiv.org/abs/2609.13391
AB - The microscopic origin of the pseudogap phase constitutes a longstanding puzzle related to the emergence of high-temperature superconductivity in cuprate materials. In this work, we develop an effective model for doped antiferromagnets in terms of fluctuating stripes, or string-like domain walls, which obscure the antiferromagnetic order of the spin background. The open ends of such domain walls of the N'eel order are treated as vortices in the resulting lattice gauge theory. We numerically evaluate the phase diagram by classical Monte Carlo simulations, using percolation-based geometric order parameters to diagnose hidden N'eel order. At high temperatures, we identify a BKT-type crossover in which the domain wall ends become deconfined. We interpret this as the T^* crossover from the hidden order regime to the paramagnetic metal above. At low temperatures, we identify stripe instabilities. Predictions of our effective model can be tested in ultracold fermion quantum simulators.
ER -