Área de investigación | Física |
Título | Beyond-Luttinger-liquid thermodynamics of a one-dimensional Bose gas with repulsive contact interactions |
Tipo de publicación | Artículo de revista |
Año de publicación | 2019 |
Autores | De Rosi, G, Massignan, P, Lewenstein, M, Astrakharchik, GE |
Revista | Physical Review Research |
Volumen | 1 |
Número | 3 |
Abstract | We present a thorough study of the thermodynamics of a one-dimensional repulsive Bose gas, focusing in particular on corrections beyond the Luttinger-liquid description. We compute the chemical potential, the pressure and the contact, as a function of temperature and gas parameter with exact thermal Bethe-Ansatz. In addition, we provide interpretations of the main features in the analytically tractable regimes, based on a variety of approaches (Bogoliubov, hard-core, Sommerfeld and virial). The beyond Luttinger-liquid thermodynamic effects are found to be non-monotonic as a function of gas parameter. Such behavior is explained in terms of non-linear dispersion and ``negative excluded volume'' effects, for weak and strong repulsion respectively, responsible for the opposite sign corrections in the thermal next-to-leading term of the thermodynamic quantities at low temperatures. Our predictions can be applied to other systems including super Tonks-Girardeau gases, dipolar and Rydberg atoms, helium, quantum liquid droplets in bosonic mixtures and impurities in a quantum bath. |
DOI | 10.1103/physrevresearch.1.033083 |