Casimir effect in critical O(N) models from nonequilibrium Monte Carlo simulations.
basic_science · Level V
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- Record sourced from PubMed, PMID 41560220.
- Also identified by DOI 10.1103/lcvl-dgv4.
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Abstract
O(N) vector models in three dimensions, when defined in a geometry with a compact direction and tuned to criticality, exhibit long-range fluctuations which induce a Casimir effect. The strength of the resulting interaction is encoded in the excess free-energy density, which depends on a universal coefficient: the Casimir amplitude. We present a high-precision numerical calculation of the latter by means of a nonequilibrium Monte Carlo algorithm and compare our findings with results obtained from large-N expansions and from the conformal bootstrap.