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15 papers · 1 filter
Rotational pendulum dynamics of a vortex molecule in a channel geometry
Sarthak Choudhury, Joachim Brand
A vortex molecule is a topological excitation in two coherently coupled superfluids consisting of a vortex in each superfluid connected by a domain wall of the relative phase, also…
Polaron-Depleton Transition in the Yrast Excitations of a One-Dimensional Bose Gas with a Mobile Impurity
Mingrui Yang, Matija Čufar, Elke Pahl +1
We present exact numerical data for the lowest-energy momentum eigenstates (yrast states) of a repulsive spin impurity in a one-dimensional Bose gas using full configuration intera…
Triplet character of 2D-fermion dimers arising from -wave attraction via spin-orbit coupling and Zeeman splitting
Ulrich Ebling, Ulrich Zülicke, Joachim Brand
We theoretically study spin- fermions confined to two spatial dimensions and experiencing isotropic short-range attraction in the presence of both spin-orbit coupling and Zeem…
Exactly solvable model for a solitonic vortex in a compressible superfluid
L. A. Toikka, J. Brand
Vortex motion is a complex problem due to the interplay between the short-range physics at the vortex core level and the long-range hydrodynamical effects. Here we show that the hy…
The universe on a table top: engineering quantum decay of a relativistic scalar field from a metastable vacuum
Oleksandr Fialko, Bogdan Opanchuk, Andrei I. Sidorov +2
The quantum decay of a relativistic scalar field from a metastable state ("false vacuum decay") is a fundamental idea in quantum field theory and cosmology. This occurs via local f…
Frequency combs with weakly lasing exciton-polariton condensates
K. Rayanov, B. L. Altshuler, Y. G. Rubo +1
We predict the spontaneous modulated emission from a pair of exciton-polariton condensates due to coherent (Josephson) and dissipative coupling. We show that strong polariton-polar…