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Entropic order
DOI:10.1038/s41467-025-66797-3.png)
Abstract
En 中文
Ordered phases of matter, such as solids, ferromagnets, superfluids, or quantum topological order, typically only exist at low temperatures. Despite this conventional wisdom, we present explicit local models in which all such phases persist to arbitrarily high temperature. This is possible since order in one degree of freedom can enable other degrees of freedom to strongly fluctuate, leading to entropic order, whereby typical high energy states are ordered. Our construction, which utilizes interacting bosons, avoids existing no-go theorems on long-range order or entanglement at high temperature. We propose a simple model for high-temperature superconductivity using these general principles. In statistical physics, systems usually become disordered at high temperatures, but some exhibit entropic order when heated, where one type of ordering enables greater fluctuations in another. Here the authors show how this type of order can persist to arbitrarily high temperature in simple classical and quantum many-body models.
Keywords:
Entropic order
High-temperature phases
Many-body systems
Ordered phases
Quantum topological order
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15.7
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9.2W
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91.2W

