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A dielectric superfluid of polar molecules
- Source :
- New Journal of Physics. 14:043018
- Publication Year :
- 2012
- Publisher :
- IOP Publishing, 2012.
-
Abstract
- We show that, under achievable experimental conditions, a Bose-Einstein condensate (BEC) of polar molecules can exhibit dielectric character. In particular, we derive a set of self-consistent mean-field equations that couple the condensate density to its electric dipole field, leading to the emergence of polarization modes that are coupled to the rich quasiparticle spectrum of the condensate. While the usual roton instability is suppressed in this system, the coupling can give rise to a phonon-like instability that is characteristic of a dielectric material with a negative static dielectric function.<br />Comment: Version published in New Journal of Physics, 11+ pages, 4 figures
- Subjects :
- Condensed Matter::Quantum Gases
Physics
Condensed matter physics
Condensed Matter::Other
Chemical polarity
FOS: Physical sciences
General Physics and Astronomy
Dielectric
Polarization (waves)
Roton
Instability
Superfluidity
Dipole
Quantum Gases (cond-mat.quant-gas)
Quasiparticle
Condensed Matter - Quantum Gases
Subjects
Details
- ISSN :
- 13672630
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- New Journal of Physics
- Accession number :
- edsair.doi.dedup.....02aecf057a5cf3a4adfedb190bb72e3f