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Thermodynamic behavior of a one-dimensional Bose gas at low temperature

Autor
de Rosi, G.; Astrakharchik, G.; Stringari, Sandro
Tipus d'activitat
Article en revista
Revista
Physical review A
Data de publicació
2017-07-11
Volum
96
Número
1
Pàgina inicial
1
Pàgina final
13
DOI
https://doi.org/10.1103/PhysRevA.96.013613 Obrir en finestra nova
Repositori
http://hdl.handle.net/2117/108073 Obrir en finestra nova
URL
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.013613 Obrir en finestra nova
Resum
We show that the chemical potential of a one-dimensional (1D) interacting Bose gas exhibits a nonmonotonic temperature dependence which is peculiar of superfluids. The effect is a direct consequence of the phononic nature of the excitation spectrum at large wavelengths exhibited by 1D Bose gases. For low temperatures T, we demonstrate that the coefficient in T^2 expansion of the chemical potential is entirely defined by the zero-temperature density dependence of the sound velocity. We calculate ...
Citació
de Rosi, G., Astrakharchik, G., Stringari, S. Thermodynamic behavior of a one-dimensional Bose gas at low temperature. "Physical Review A", 11 Juliol 2017, vol. 96, núm. 1, p. 1-13.
Paraules clau
Thermodynamic Bose gas
Grup de recerca
SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity

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