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Publikováno v:
Phys. Rev. A 79, 063615 (2009)
We consider an atomic Fermi gas confined in a uniform optical lattice potential, where the atoms can pair into molecules via a magnetic field controlled narrow Feshbach resonance. Thus by adjusting the magnetic field the portion of fermionic and boso
Externí odkaz:
http://arxiv.org/abs/0901.3625
Publikováno v:
Phys. Rev. A 79, 053601 (2009)
We consider an atomic Fermi gas confined in a uniform optical lattice potential, where the atoms can pair into molecules via a magnetic field controlled narrow Feshbach resonance. The phase diagram of the resulting atom-molecule mixture in chemical a
Externí odkaz:
http://arxiv.org/abs/0810.2696
We study two-body correlations for $N$ identical bosons by use of the hyperspherical adiabatic expansion method. We use the zero-range interaction and derive a transcendental equation determining the key ingredient of the hyperradial potential. The n
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407065
The effective potential is computed for two boson systems in one trap as a function of their two individual hyperadii and the distance between their centers. Zero-range interactions are used and only relative s-states are included. Existence and prop
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403208
The lowest adiabatic potential expressed in hyperspherical coordinates is estimated for two boson systems in an external harmonic trap. Corresponding conditions for stability are investigated and the related structures are extracted for zero-range in
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402271
Autor:
Sørensen, O.
A description of a large system of particles is often sought in a derivation from the detailed behaviour of just a few of the particles. The present thesis deals with the connection between such microscopic features and the nature of a collection of
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401323
Publikováno v:
Phys. Rev. A 70, 013609 (2004)
The hyperspherical adiabatic expansion method is used to describe correlations in a symmetric boson system rigorously confined to two spatial dimensions. The hyperangular eigenvalue equation turns out to be almost independent of the hyperradius, wher
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401285
Publikováno v:
Phys. Rev. A 70, 013610 (2004)
The hyperspherical adiabatic method is used to derive stability criteria for Bose-Einstein condensates in deformed external fields. An analytical approximation is obtained. For constant volume the highest stability is found for spherical traps. Analy
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310462
Publikováno v:
Few-Body Systems 34, 203 (2004)
We study two-body correlations in a many-boson system with a hyperspherical approach, where we can use arbitrary scattering length and include two-body bound states. As a special application we look on Bose-Einstein condensation and calculate the sta
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310304