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Article Dans Une Revue Physical Review Letters Année : 2020

Numerical simulation of finite-temperature field theory for interacting bosons

Résumé

We report a stable and efficient complex Langevin sampling scheme for performing approximation-free numerical simulations directly on the path-integral coherent-states field theory for an assembly of interacting bosons. We apply the method to generate the λ line of critical phase transitions associated with Bose-Einstein condensation in a model ϕ$^4$ scalar field theory. The new approach enjoys near-linear scaling in the resolved (d+1) spatial and imaginary-time dimensions and should be particularly efficient for the study of dense systems at low temperature.
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Dates et versions

hal-02504622 , version 1 (06-12-2022)

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Kris T. Delaney, Henri Orland, Glenn H. Fredrickson. Numerical simulation of finite-temperature field theory for interacting bosons. Physical Review Letters, 2020, 124 (7), pp.070601. ⟨10.1103/PhysRevLett.124.070601⟩. ⟨hal-02504622⟩
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