| Autor: |
Armaitis J; Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands., Duine RA, Stoof HT |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2013 Nov 22; Vol. 111 (21), pp. 215301. Date of Electronic Publication: 2013 Nov 19. |
| DOI: |
10.1103/PhysRevLett.111.215301 |
| Abstrakt: |
We show that a Bose-Einstein condensate of heteronuclear molecules in the regime of small and static electric fields is described by a quantum rotor model for the macroscopic electric dipole moment of the molecular gas cloud. We solve this model exactly and find the symmetric, i.e., rotationally invariant, and dipolar phases expected from the single-molecule problem, but also an axial and planar nematic phase due to many-body effects. Investigation of the wave function of the macroscopic dipole moment also reveals squeezing of the probability distribution for the angular momentum of the molecules. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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