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arXiv 2205.03359hep-th
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环面上的二维大质量可积模型

Two-dimensional massive integrable models on a torus

Ivan Kostov

AI总结:

本文用环面上相互作用的环路巨正则系综描述大质量可积QFT的有限体积热力学,通过Hubbard-Stratonovich变换显式求解路径积分,并在周期无穷大极限下由平均场理论结合Thermodynamical Bethe Ansatz求解无限体积热力学。

摘要:

大质量可积QFT的有限体积热力学由浸入环面中并通过与其交点相关的散射因子进行相互作用的环路巨正则系综来描述。通过Hubbard-Stratonovich变换解耦成对相互作用后,环路路径积分被显式求值。HS场是依赖于快度的全纯场,可展开为基本振子。环面配分函数被表示为这些振子Fock空间中的某个期望值。在环面其中一个周期趋于无穷大的极限下,有效场论变为平均场类型。该平均场描述了无限体积热力学,其由Thermodynamical Bethe Ansatz求解。

英文摘要:

The finite-volume thermodynamics of a massive integrable QFT is described in terms of a grand canonical ensemble of loops immersed in a torus and interacting through scattering factors associated with their intersections. The path integral of the loops is evaluated explicitly after decoupling the pairwise interactions by a Hubbard-Stratonovich transformation. The HS fields are holomorphic fields depending on the rapidity and can be expanded in elementary oscillators. The torus partition function is expressed as certain expectation value in the Fock space of these oscillators. In the limit where one of the periods of the torus becomes asymptotically large, the effective field theory becomes mean field type. The mean field describes the infinite-volume thermodynamics which is solved by the Thermodynamical Bethe Ansatz.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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