The phase diagram of a charged Bose gas is drawn. We discuss the domains of existence of the solid, fluid, and superfluid phases. It is predicted that superdense helium can be superfluid at densities higher than ${10}^{6}$ ${\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}$ .The phase diagram of a charged Bose gas is drawn. We discuss the domains of existence of the solid, fluid, and superfluid phases. It is predicted that superdense helium can be superfluid at densities higher than ${10}^{6}$ ${\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}$.

Physical Review LettersOct 9, 197229 citations

Critical behavior of a charged Bose gas

R. F. Bishop

Journal of Low Temperature PhysicsJun 1, 197422 citations

Two-particle pairing and phase separation in a two-dimensional Bose gas with one or two sorts of bosons

M. Yu. Kagan, Dmitri V. Efremov

We present a phase diagram for a dilute two-dimensional Bose gas on a lattice. For one sort of boson we consider a realistic case of the van der Waals interaction between particles with a strong hard-core repulsion U and a van der Waals attractive tail V. For $V<2t,$ t being a hopping amplitude, the phase diagram of the system contains regions of usual one-particle Bose-Einstein condensation (BEC). However for $V>2t$ we have total phase separation on a Mott-Hubbard Bose solid and a dilute Bose gas. For two sorts of structureless bosons described by the two-band Hubbard model, an s-wave pairing of the two bosons of different sort $〈{b}_{1}{b}_{2}〉\ensuremath{\ne}0$ is possible. The results we obtained should be important for different Bose systems, including submonolayers of ${}^{4}\mathrm{He},$ excitons in semiconductors, Schwinger bosons in magnetic systems and holons in HTSC. In the HTSC case a possibility of two-holon pairing in the slave-boson theories of superconductivity can restore a required charge $2e$ of a Cooper pair.We present a phase diagram for a dilute two-dimensional Bose gas on a lattice. For one sort of boson we consider a realistic case of the van der Waals interaction between particles with a strong hard-core repulsion U and a van der Waals attractive tail V. For $V<2t,$ t being a hopping amplitude, the phase diagram of the system contains regions of usual one-particle Bose-Einstein condensation (BEC). However for $V>2t$ we have total phase separation on a Mott-Hubbard Bose solid and a dilute Bose gas. For two sorts of structureless bosons described by the two-band Hubbard model, an s-wave pairing of the two bosons of different sort $〈{b}_{1}{b}_{2}〉\ensuremath{\ne}0$ is possible. The results we obtained should be important for different Bose systems, including submonolayers of ${}^{4}\mathrm{He},$ excitons in semiconductors, Schwinger bosons in magnetic systems and holons in HTSC. In the HTSC case a possibility of two-holon pairing in the slave-boson theories of superconductivity can restore a required charge $2e$ of a Cooper pair.

arXiv:cond-mat/0107453Physical review. B, Condensed matterApr 18, 200238 citations

Ground state of the charged bose gas

M. S. Bhatia

Il Nuovo Cimento BJul 1, 19674 citations

{10}^{6}

{\mathrm{g}/\mathrm{c}\mathrm{m}}^{3}

V<2t,

t being a hopping amplitude, the phase diagram of the system contains regions of usual one-particle Bose-Einstein condensation (BEC). However for

V>2t

we have total phase separation on a Mott-Hubbard Bose solid and a dilute Bose gas. For two sorts of structureless bosons described by the two-band Hubbard model, an s-wave pairing of the two bosons of different sort $〈{b}_{1}{b}_{2}〉\ensuremath{\ne}0$ is possible. The results we obtained should be important for different Bose systems, including submonolayers of

{}^{4}\mathrm{He},

excitons in semiconductors, Schwinger bosons in magnetic systems and holons in HTSC. In the HTSC case a possibility of two-holon pairing in the slave-boson theories of superconductivity can restore a required charge

2e

of a Cooper pair.