6 papers
Dynamical control of the conductivity of an atomic Josephson junction
Beilei Zhu, Vijay Pal Singh, Junichi Okamoto +1
We propose to dynamically control the conductivity of a Josephson junction composed of two weakly coupled one dimensional condensates of ultracold atoms. A current is induced by a…
Second sound in the BEC-BCS crossover
Daniel Kai Hoffmann, Vijay Pal Singh, Thomas Paintner +4
Second sound is an entropy wave which propagates in the superfluid component of a quantum liquid. Because it is an entropy wave, it probes the thermodynamic properties of the quant…
Josephson junction dynamics in a two-dimensional ultracold Bose gas
Vijay Pal Singh, Niclas Luick, Lennart Sobirey +1
We investigate the Berezinskii-Kosterlitz-Thouless (BKT) scaling of the critical current of Josephson junction dynamics across a barrier potential in a two-dimensional (2D) Bose ga…
Sound propagation in a two-dimensional Bose gas across the superfluid transition
Vijay Pal Singh, Ludwig Mathey
Motivated by recent experiments in Phys. Rev. Lett. 121, 145301 (2018), we study sound propagation in a two-dimensional (2D) Bose gas across the superfluid-thermal transition using…
An ideal Josephson junction in an ultracold two-dimensional Fermi gas
Niclas Luick, Lennart Sobirey, Markus Bohlen +4
The role of reduced dimensionality in high temperature superconductors is still under debate. Recently, ultracold atoms have emerged as an ideal model system to study such strongly…
Squeezed field path integral description of second sound in Bose-Einstein condensates
Ilias M. H. Seifie, Vijay Pal Singh, L. Mathey
We propose a generalization of the Feynman path integral using squeezed coherent states. We apply this approach to the dynamics of Bose-Einstein condensates, which gives an effecti…