Revealing Many-Body Phases at finite temperatures through Quantum Coherence Distribution
Abstract
We introduce a diagnostic framework based on the full probability distribution of quantum coherence to probe single-particle and many-body phases at finite temperature. We first apply this approach to the localization transition in the non-interacting Aubry-André model and then extend the analysis to its interacting counterpart, whose phase diagram is substantially richer. We show that the moments of the coherence distribution provide clear signatures of quantum phase transitions and capture the emergence of many-body phases. More importantly, we find that the entropy of the coherence distribution emerges as an even more powerful indicator, retaining clear signatures of the underlying quantum phases while remaining remarkably robust against increasing thermal fluctuations.
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BibTeX
@misc{palamara2026revealing,
title = {{Revealing Many-Body Phases at finite temperatures through Quantum Coherence Distribution}},
author = {Antonio Palamara and Nicola Lo Gullo and Antonello Sindona and Francesco Plastina},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.03226},
eprint = {2609.03226},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.03226},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Revealing Many-Body Phases at finite temperatures through Quantum Coherence Distribution
AU - Antonio Palamara
AU - Nicola Lo Gullo
AU - Antonello Sindona
AU - Francesco Plastina
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.03226
UR - https://arxiv.org/abs/2609.03226
AB - We introduce a diagnostic framework based on the full probability distribution of quantum coherence to probe single-particle and many-body phases at finite temperature. We first apply this approach to the localization transition in the non-interacting Aubry-André model and then extend the analysis to its interacting counterpart, whose phase diagram is substantially richer. We show that the moments of the coherence distribution provide clear signatures of quantum phase transitions and capture the emergence of many-body phases. More importantly, we find that the entropy of the coherence distribution emerges as an even more powerful indicator, retaining clear signatures of the underlying quantum phases while remaining remarkably robust against increasing thermal fluctuations.
ER -