Phase transitions in dipolar spin-1 Bose gases

Details Phase transitions in dipolar spin-1 Bose gases Phase transitions in dipolar spin-1 Bose gases

2011-03-29

arxiv.org/abs/1103.5790v2

Phys. Rev. A 84, 013605 (2011)

Physics

Condensed Matter

Quantum Gases

13 pages, 11 figures; published version

Scientific paper

10.1103/PhysRevA.84.013605

We study phase transitions in homogeneous spin-1 Bose gases in the presence of long-range magnetic dipole-dipole interactions (DDI). We concentrate on three-dimensional geometries and employ momentum shell renormalization group to study the possible instabilities caused by the dipole-dipole interaction. At the zero-temperature limit where quantum fluctuations prevail, we find the phase diagram to be unaffected by the dipole-dipole interaction. When the thermal fluctuations dominate, polar and ferromagnetic condensates with DDI become unstable and we discuss this crossover in detail. On the other hand, the spin-singlet condensate remains stable in the presence of dipole-dipole interactions.

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