Study of properties of Bose-Einstein condensates: dipolar atoms
Nonlinear excitations beyond the mean-field in dipolar Bose-Einstein condensates
Strongly interacting bosons in disordered lattice, quantum phases, coherence and ...
Grant number: | 12/00451-0 |
Support Opportunities: | Research Projects - Thematic Grants |
Start date: | May 01, 2012 |
End date: | April 30, 2018 |
Field of knowledge: | Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics |
Principal Investigator: | Sadhan Kumar Adhikari |
Grantee: | Sadhan Kumar Adhikari |
Host Institution: | Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil |
Associated research grant(s): | 14/07795-1 - Few-body systems in the low-energy regime: antimatter physics of protonium formation and four-atomic HD+H2 and HD+HD scattering at cold and ultra-cold temperatures, AV.EXT |
Associated scholarship(s): | 13/07213-0 - Static and dynamical properties of spinor condensates,
BP.PD 12/21871-7 - Study on properties of dipolar Bose-Einstein Condensates, BP.PD |
Abstract
We will study the static and dynamic properties of a trapped Bose-Einstein condensate. A conventional condensate has only aweak atomic interaction of short range. The study of Bose-Einstein condensates will be extended to include condensates of dipolar bosonic atoms and also of fermionic atoms. A Bose-Einstein condensate of dipolar atoms has long-range anisotropic dipolar interaction and has distinct stability properties and can lead to the formation of stable soliton in one and two spatial dimensions only under the action of a weak periodic potential of optical lattice. In the propagation of sound and the collapse of dipolar condensates, we have the manifestation ofanisotropic interaction. The sound travels at different speeds in different directions. The soliton may also have an anisotropic structure. Because of the Pauli principle the condensate of fermions is more stable and allows the study in the region of strong interaction. Various topics of trapped condensate will be studied, such as the formation of solitons and vortices, propagation of sound and shock wave, the strong interaction limit, dynamic oscillation,coupled interacting condensates, collapse, etc. We will study these issues using a time-dependent mean-field formalism. In the case of weak interaction this procedure reduces to the Gross-Pitaevskii equation. We will solve the mean-field equation numerically and also using the variational approximation to study the properties of the condensates. (AU)
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