Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Baur, Stefan K."'
Publikováno v:
Phys. Rev. A 89, 051605(R) (2014)
We introduce an all-optical approach to producing high-flux synthetic magnetic fields for neutral atoms or molecules by designing intrinsically time-periodic optical superlattices. A single laser source, modulated to generate two frequencies, suffice
Externí odkaz:
http://arxiv.org/abs/1402.3295
Autor:
Baur, Stefan K., Cooper, Nigel R.
Publikováno v:
Phys. Rev. A 88, 033603 (2013)
By engineering appropriate artificial gauge potentials, a Bose-Einstein condensate can be adiabatically loaded into a current carrying state that resembles a vortex lattice of a rotating uniform Bose gas. We give two explicit, experimentally feasible
Externí odkaz:
http://arxiv.org/abs/1306.4611
Publikováno v:
Phys. Rev. A 87, 043612 (2013)
We derive analytical expressions for the frequency and damping of the lowest collective modes of a two-dimensional Fermi gas using kinetic theory. For strong coupling, we furthermore show that pairing correlations overcompensate the effects of Pauli
Externí odkaz:
http://arxiv.org/abs/1301.0358
Autor:
Baur, Stefan K., Cooper, Nigel R.
Publikováno v:
Phys. Rev. Lett. 109, 265301 (2012)
Ultracold atoms in Raman-dressed optical lattices allow for effective momentum-dependent interactions among single-species fermions originating from short-range s-wave interactions. These dressed-state interactions combined with very flat bands encou
Externí odkaz:
http://arxiv.org/abs/1208.6540
Autor:
Baur, Stefan K., Fröhlich, Bernd, Feld, Michael, Vogt, Enrico, Pertot, Daniel, Koschorreck, Marco, Köhl, Michael
Publikováno v:
Phys. Rev. A 85, 061604(R) (2012)
The line shape of radio frequency spectra of tightly bound Feshbach molecules in strong transverse confinement can be described by a simple analytic formula that includes final state interactions. By direct comparison to experimental data, we clarify
Externí odkaz:
http://arxiv.org/abs/1204.2704
Autor:
Levinsen, Jesper, Baur, Stefan K.
Publikováno v:
Phys. Rev. A 86, 041602(R) (2012)
We demonstrate that the theoretical description of current experiments of quasi-2D Fermi gases requires going beyond usual 2D theories. We provide such a theory for the highly spin-imbalanced quasi-2D Fermi gas. For typical experimental conditions, w
Externí odkaz:
http://arxiv.org/abs/1202.6564
Autor:
Baur, Stefan K., Mueller, Erich J.
Publikováno v:
Phys. Rev. A 82, 023626 (2010)
We study entropy generation in a one-dimensional (1D) model of bosons in an optical lattice experiencing two-particle losses. Such heating is a major impediment to observing exotic low temperature states, and "simulating" condensed matter systems. De
Externí odkaz:
http://arxiv.org/abs/1003.5235
Autor:
Liao, Yean-an, Rittner, Ann Sophie C., Paprotta, Tobias, Li, Wenhui, Partridge, Guthrie B., Hulet, Randall G., Baur, Stefan K., Mueller, Erich J.
Publikováno v:
Nature 467, 567-569 (2010)
Superconductivity and magnetism generally do not coexist. Changing the relative number of up and down spin electrons disrupts the basic mechanism of superconductivity, where atoms of opposite momentum and spin form Cooper pairs. Nearly forty years ag
Externí odkaz:
http://arxiv.org/abs/0912.0092
Publikováno v:
Phys. Rev. A 81, 033628 (2010)
We study the three-fermion problem within a 1D model of a Feshbach resonance in order to gain insight into how the FFLO-like state at small negative scattering lengths evolves into a Bose-Fermi mixture at small positive scattering lengths. The FFLO s
Externí odkaz:
http://arxiv.org/abs/0902.4653
Publikováno v:
Phys. Rev. A 79, 063628 (2009)
We present a series of theoretical studies of the boundary between a superfluid and normal region in a partially polarized gas of strongly interacting fermions. We present mean-field estimates of the surface energy in this boundary as a function of t
Externí odkaz:
http://arxiv.org/abs/0901.2945