String Theory Journal Club

Conformal field theory predicts the leading-order temperature-correction in the free energy of one-dimensional critical systems. It scales with the second power of temperature with a universal prefactor. In the talk based on a recent preprint arXiv:2410.12986, the leading correction to this classic result will be derived in the case of integrable model of one-dimensional bosons with delta function repulsion. It scales with the fourth power of temperature. The corresponding prefactor will be calculated exactly for any repulsion strength.