Normal-Superfluid Phase Separation in Spin-Half Bosons at Finite Temperature
| Autor: | He, Li, Gao, Peipei, Yu, Zeng-Qiang |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 125, 055301 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.125.055301 |
| Popis: | For pseudospin-half bosons with inter-spin attraction and intra-spin repulsion, normal phase and Bose condensed phase can coexist at finite temperature. The homogeneous system is unstable against the spinodal decomposition within a medium density interval, and consequently, a normal-superfluid phase separation takes place. The isothermal equation-of-state shows a characteristic plateau in the P-V (pressure-volume) diagram, which is reminiscent of a classical gas-liquid transition, although, unlike the latter, the coexistence lines never terminate at a critical point as temperature increases. In a harmonic trap, the phase separation can be revealed by the density profile of the atomic cloud, which exhibits a sudden jump across the phase boundary. Comment: 6+5 pages, 4+3 figures, published version |
| Databáze: | arXiv |
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