71 citations · 177 across the 6 of their papers we have counts for
6 papers
Expansion dynamics in two-dimensional Bose-Hubbard lattices: Bose-Einstein condensate and thermal cloud
Mauricio Trujillo-Martinez, Anna Posazhennikova, Johann Kroha
We study the temporal expansion of an ultracold Bose gas in two-dimensional, square optical lattices. The gas is described by the Bose-Hubbard model deep in the superfluid regime,…
Thermalization of isolated Bose-Einstein condensates by dynamical heat bath generation
Anna Posazhennikova, Mauricio Trujillo-Martinez, Johann Kroha
If and how an isolated quantum system thermalizes despite its unitary time evolution is a long-standing, open problem of many-body physics. The eigenstate thermalization hypothesis…
Inflationary quasiparticle creation and thermalization dynamics in coupled Bose-Einstein condensates
Anna Posazhennikova, Mauricio Trujillo-Martinez, Johann Kroha
A Bose gas in a double-well potential, exhibiting a true Bose-Einstein condensate (BEC) amplitude and initially performing Josephson oscillations, is a prototype of an isolated, no…
Temporal non-equilibrium dynamics of a Bose Josephson junction in presence of incoherent excitations
Mauricio Trujillo-Martinez, Anna Posazhennikova, Johann Kroha
The time-dependent non-equilibrium dynamics of a Bose-Einstein condensate (BEC) typically generates incoherent excitations out of the condensate due to the finite frequencies prese…
Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets
Masakazu Matsubara, Alexander Schroer, Andreas Schmehl +7
Ultrafast strengthening or quenching of the ferromagnetic order of semiconducting Eu1-xGdxO was achieved by resonant photoexcitation. The modification of the magnetic order is esta…
Nonequilibrium Josephson oscillations in Bose-Einstein condensates without dissipation
Mauricio Trujillo Martinez, Anna Posazhennikova, Johann Kroha
We perform a detailed field theoretical study of nonequilibrium Josephson oscillations between interacting Bose-Einstein condensates confined in a finite-size double-well trap. We…