Zobrazeno 1 - 10
of 235
pro vyhledávání: '"Leskinen, M."'
Publikováno v:
Phys. Rev. Lett. 105, 225301 (2010)
The Josephson effect is a manifestation of the macroscopic phase coherence of superconductors and superfluids. We propose that with ultracold Fermi gases one can realise a spin-asymmetric Josephson effect in which the two spin components of a Cooper
Externí odkaz:
http://arxiv.org/abs/0911.4678
Publikováno v:
New Journal of Physics 12, 083041 (2010)
We consider spectroscopies of strongly interacting atomic gases, and we propose a model for describing the coupling between quasiparticles and gapless phonon-like modes. Our model explains features in a wide range of different experiments in both fer
Externí odkaz:
http://arxiv.org/abs/0910.4447
Publikováno v:
Phys. Rev. Lett. 103, 066404 (2009)
We consider a strongly repulsive two-component Fermi gas in a one-dimensional (1D) optical lattice described in terms of a Hubbard Hamiltonian. We analyze the response of the system to a periodic modulation of the hopping amplitude in presence of lar
Externí odkaz:
http://arxiv.org/abs/0904.4815
Publikováno v:
Phys. Rev. Lett. 102, 168902 (2009)
This is a Reply to: Comment on "Spectral Signatures of the Fulde-Ferrell-Larkin-Ovchinnikov Order Parameter in One-Dimensional Optical Lattices" R. A. Molina J. Dukelksy, and P. Schmitteckert, Phys. Rev. Lett. 102, 168901 (2009)
Comment: 1 page,
Comment: 1 page,
Externí odkaz:
http://arxiv.org/abs/0904.4345
Publikováno v:
Phys.Rev.Lett. 101, 120404 (2008)
We address an imbalanced two-component atomic Fermi gas restricted by a one-dimensional (1D) optical lattice and an external harmonic potential, within the mean-field Bogoliubov-de Gennes (BdG) formalism. We show that characteristic features of the F
Externí odkaz:
http://arxiv.org/abs/0806.4961
Publikováno v:
Phys. Rev. A 78, 023602 (2008)
We consider RF-spectroscopy of ultracold Fermi gases by exact simulations of the many-body state and the coherent dynamics in one dimension. Deviations from the linear response sum rule result are found to suppress the pairing contribution to the RF
Externí odkaz:
http://arxiv.org/abs/0802.1882
Publikováno v:
Phys. Rev. A 76, 021604(R) 2007
We propose a pairing-based method for cooling an atomic Fermi gas. A three component (labels 1, 2, 3) mixture of Fermions is considered where the components 1 and 2 interact and, for instance, form pairs whereas the component 3 is in the normal state
Externí odkaz:
http://arxiv.org/abs/0705.0271
We investigate magnetic properties of Mott-insulating phases of ultracold Bose and Fermi spinor gases in optical lattices. We consider in particular the F=2 Bose gas, and the F=3/2 and F=5/2 Fermi gases. We derive effective spin Hamiltonians for one
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603273
Publikováno v:
PHYSICAL REVIEW B 76, 172505 (2007)
We have fabricated and measured superconducting single-electron transistors with Al leads and Nb islands. At bias voltages below the gap of Nb we observe clear signatures of resonant tunneling of Cooper pairs, and of Coulomb blockade of the subgap cu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311148
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