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Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux
Fabian Brauneis, Areg Ghazaryan, Hans-Werner Hammer +1
The model of a ring threaded by the Aharonov-Bohm flux underlies our understanding of a coupling between gauge potentials and matter. The typical formulation of the model is based…
Magnetic impurity in a one-dimensional few-fermion system
Lukas Rammelmüller, David Huber, Matija Čufar +3
We present a numerical analysis of spin- fermions in a one-dimensional harmonic potential in the presence of a magnetic point-like impurity at the center of the trap.…
Artificial atoms from cold bosons in one dimension
Fabian Brauneis, Timothy G Backert, Simeon I Mistakidis +3
We investigate the ground-state properties of weakly repulsive one-dimensional bosons in the presence of an attractive zero-range impurity potential. First, we derive mean-field so…
Impurities in a one-dimensional Bose gas: the flow equation approach
F. Brauneis, H. -W. Hammer, M. Lemeshko +1
A few years ago, flow equations were introduced as a technique for calculating the ground-state energies of cold Bose gases with and without impurities. In this paper, we extend th…
In-medium bound states of two bosonic impurities in a one-dimensional Fermi gas
D. Huber, H. -W. Hammer, A. G. Volosniev
We investigate the ground-state energy of a one-dimensional Fermi gas with two bosonic impurities. We consider spinless fermions with no fermion-fermion interactions. The fermion-i…
More on the universal equation for Efimov states
M. Gattobigio, M. Göbel, H. -W. Hammer +1
Efimov states are a sequence of shallow three-body bound states that arise when the two-body scattering length is much larger than the range of the interaction. The binding energie…