Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Wunsch B"'
Publikováno v:
Phys. Rev. B 86, 144527 (2012)
We investigate the equilibrium and dynamical properties of the Bose-Hubbard model and the related particle-hole symmetric spin-1 model in the vicinity of the superfluid to Mott insulator quantum phase transition. We employ the following methods: exac
Externí odkaz:
http://arxiv.org/abs/1206.1648
Publikováno v:
Phys. Rev. A 84, 063606 (2011)
We consider dipolar interactions between heteronuclear molecules in low-dimensional geometries. The setup consists of two one-dimensional tubes. We study the stability of possible few-body complexes in the regime of repulsive intratube interaction, w
Externí odkaz:
http://arxiv.org/abs/1110.1552
Publikováno v:
Phys. Rev. Lett. 107, 073201 (2011)
We consider dipolar interactions between heteronuclear molecules in a low-dimensional setup consisting of two one-dimensional tubes. We demonstrate that attraction between molecules in different tubes can overcome intratube repulsion and complexes wi
Externí odkaz:
http://arxiv.org/abs/1103.3996
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 125301
The exploration of cold polar molecules in different geometries is a rapidly developing experimental and theoretical pursuit. Recently, the implementation of optical lattices has enabled confinement in stacks of planes, the number of which is also co
Externí odkaz:
http://arxiv.org/abs/1012.4957
Publikováno v:
Phys. Rev. A. 85, 013603 (2012)
We investigate the quantum and thermal phase diagram of fermionic polar molecules loaded in a bilayer trapping potential with perpendicular dipole moment. We use both a BCS theory approach that is most realiable at weak-coupling and a strong-coupling
Externí odkaz:
http://arxiv.org/abs/1009.2030
Publikováno v:
Phys. Rev. B 82, 125437 (2010)
We study the two-electron eigenspectrum of a carbon-nanotube double quantum dot with spin-orbit coupling. Exact calculation are combined with a simple model to provide an intuitive and accurate description of single-particle and interaction effects.
Externí odkaz:
http://arxiv.org/abs/1006.0209
Publikováno v:
Phys. Rev. Lett. 105, 095301 (2010)
We study a balanced two-component system of ultracold fermions in one dimension with attractive interactions and subject to a spin-dependent optical lattice potential of opposite sign for the two components. We find states with different types of mod
Externí odkaz:
http://arxiv.org/abs/0910.1803
Publikováno v:
Phys. Rev. A 81, 013616 (2010)
We analyze the repulsive fermionic Hubbard model on square and cubic lattices with spin imbalance and in the presence of a parabolic confinement. We analyze the magnetic structure as a function of the repulsive interaction strength and polarization.
Externí odkaz:
http://arxiv.org/abs/0909.0976
Publikováno v:
New J. Phys. 10 (2008) 103027
We study the electronic structure and the phase diagram of non-interacting fermions confined to hexagonal optical lattices. In the first part, we compare the properties of Dirac points arising in the eigenspectrum of either honeycomb or triangular la
Externí odkaz:
http://arxiv.org/abs/0807.4245
Publikováno v:
Phys. Rev. Lett. 101, 036803 (2008)
We analyze interaction effects on boundary states of single layer graphene. Near a half filled band, both short and long-ranged interactions lead to a fully spin polarized configuration. In addition, the band of boundary states acquires a finite disp
Externí odkaz:
http://arxiv.org/abs/0803.1050