30 citations · 98 across the 12 of their papers we have counts for
12 papers
Hartree shift and pairing gap in ultracold Fermi gases in the framework of low-momentum interactions
Michael Urban, S. Ramanan
In this paper we consider a two-component gas of fermions on the BCS side of the BCS-BEC crossover at zero temperature. We use a momentum dependent interaction that reproduces the…
Superfluid fraction in the crystal phase of the inner crust of neutron stars
Giorgio Almirante, Theodora Kaskitsi, Michael Urban
In the most extended layer of the inner crust of neutron stars, nuclear matter is believed to form a crystal of clusters immersed in a superfluid neutron gas. Here we analyze this…
Superfluid density in linear response theory : pulsar glitches from the inner crust of neutron stars
Giorgio Almirante, Michael Urban
The question of whether there are enough superfluid neutrons in the inner crust of neutron stars to explain pulsar glitches remains a topic of debate. Previous band structure calcu…
Superfluid fraction in the rod phase of the inner crust of neutron stars
Giorgio Almirante, Michael Urban
The rod phase as it is expected in the bottom layers of neutron-star crusts is analyzed within the Hartree-Fock-Bogoliubov framework. In order to well describe the interplay betwee…
Effect of the equation of state for dilute neutron matter on the composition of the inner crust of neutron stars
Sunny Kumar Gupta, Michael Urban
The composition of the inner crust of neutron stars is usually studied using phenomenological interactions such as Skyrme energy-density functionals. But most of these functionals…
Superfluid fraction in the slab phase of the inner crust of neutron stars
Giorgio Almirante, Michael Urban
An analysis of the slab phase as it is expected in the innermost layer of neutron-star crusts is performed within the Hartree-Fock-Bogoliubov framework. We take the periodicity of…
Impact ionization induced by terahertz radiation in HgTe quantum wells of critical thickness
S. Hubmann, G. V. Budkin, M. Urban +9
We report on the observation of terahertz (THz) radiation induced band-to-band impact ionization in \HgTe quantum well (QW) structures of critical thickness, which are characterize…
Pairing correlations of cold fermionic gases at overflow from a narrow to a wide harmonic trap
A. Pastore, P. Schuck, M. Urban +2
Within the context of Hartree-Fock-Bogoliubov theory, we study the behavior of superfluid Fermi systems when they pass from a small to a large container. Such systems can be now re…
Bose-Fermi Pairs in a Mixture and the Luttinger Theorem within a Nozieres-Schmitt-Rink like Approach
T. Sogo, P. Schuck, M. Urban
Bose-Fermion pair correlations in a mixture are considered at zero temperature in the T-matrix approximation. Special attention is paid to the Luttinger theorem. In a strict RPA va…
Spontaneous generation of spin-orbit coupling in magnetic dipolar Fermi gases
T. Sogo, M. Urban, P. Schuck +1
The stability of an unpolarized two-component dipolar Fermi gas is studied within mean-field theory. Besides the known instability towards spontaneous magnetization with Fermi sphe…
Dynamics of a trapped Fermi gas in the BCS phase
M. Urban, P. Schuck
We derive semiclassical transport equations for a trapped atomic Fermi gas in the BCS phase at temperatures between zero and the superfluid transition temperature. These equations…
Thomas-Fermi approximation to static vortex states in superfluid trapped atomic gases
M. Urban, P. Schuck, X. Vinas
We revise the Thomas-Fermi approximation for describing vortex states in Bose condensates of magnetically trapped atoms. Our approach is based on considering the hbar -> 0 limit ra…