Abstract：
:We consider the finite-temperature properties of the extended Bose-Hubbard model realized recently in an ETH experiment [Nature 532, 476 (2016)]. Competing short- and global-range interactions accommodate fascinating collective phenomena. We formulate a self-consistent mean-field theory to describe the behaviors of the system at finite temperatures. At a fixed chemical potential, we map out the distributions of the superfluid order parameters and number densities with respect to the temperatures. For a charge density wave, we find that the global-range interaction enhances the charge order by increasing the transition temperature at which the charge order melts out, while for a supersolid phase, we find that the disappearance of the charge order and the superfluid order occurs at different temperature. At a fixed number-density filling factor, we extract the temperature dependence of the thermodynamic functions such as internal energy, specific heat and entropy. Across the superfluid phase transition, the specific heat has a discontinuous jump.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Chen HJ,Yu YQ,Zheng DC,Liao Rdoi
10.1038/s41598-020-66054-1subject
Has Abstractpub_date
2020-06-03 00:00:00pages
9076issue
1issn
2045-2322pii
10.1038/s41598-020-66054-1journal_volume
10pub_type
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