Josephson effect in Superconductors and Superfluids (2009)
We present a brief pedagogical introduction into the basic physics of the Josephson effect in superconductors and Bose-Einstein condensates. We show how the critical Josephson current between two...
Nonequilibrium Josephson oscillations in Bose-Einstein condensates without dissipation (2009)
Martinez, Mauricio Trujillo, Posazhennikova, Anna, Kroha, Johann
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 find that the...
Two atomic quantum dots interacting via coupling to BECs (2009)
Posazhennikova, Anna, Belzig, Wolfgang
We consider a system of three weakly coupled Bose-Einstein condensates and two atomic quantum dots embedded in the barriers between the condensates. Each dot is coupled to two neighboring condensates...
Fischer, Uwe R., Iniotakis, Christian, Posazhennikova, Anna
We study an atomic quantum dot representing a single hyperfine ``impurity'' atom which is coherently coupled to two well-separated Bose-Einstein condensates. It is demonstrated that the quantum dot...
Conductance of a spin-1 quantum dot: the two-stage Kondo effect (2006)
Posazhennikova, Anna, Bayani, Babak, Coleman, P.
We discuss the physics of a of a spin-1 quantum dot, coupled to two metallic leads and develop a simple model for the temperature dependence of its conductance. Such quantum dots are described by a...
A Quantum Top Inside a Bose Josephson Junction (2006)
Bausmerth, Ingrid, Fischer, Uwe R., Posazhennikova, Anna
We consider an atomic quantum dot confined between two weakly-coupled Bose-Einstein condensates, where the dot serves as an additional tunneling channel. It is shown that the thus-embedded atomic...
Weakly Interacting, Dilute Bose Gases in 2D (2005)
This article surveys a number of theoretical problems and open questions in the field of two-dimensional dilute Bose gases with weak repulsive interactions. In contrast to three dimensions, in two...
Fluctuation conductivity in superconductors in strong electric fields (2002)
Posazhennikova, Anna; U0032375
We study the effect of a strong electric field on the fluctuation conductivity within the time-dependent Ginzburg-Landau theory for the case of arbitrary dimension. Our results are based on the...
Fluctuation conductivity in superconductors in strong electric fields (2001)
Mishonov, Todor, Posazhennikova, Anna, Indekeu, Joseph
We study the effect of a strong electric field on the fluctuation conductivity within the time-dependent Ginzburg-Landau theory for the case of arbitrary dimension. Our results are based on the...