192 citations · 529 across the 10 of their papers we have counts for
10 papers
Superfluid-droplet crossover in a binary boson mixture on a ring: Exact diagonalization solutions for few-particle systems in one dimension
L. Chergui, J. Bengtsson, J. Bjerlin +3
We investigate the formation of self-bound quantum droplets in a one-dimensional binary mixture of bosonic atoms, applying the method of numerical diagonalization of the full Hamil…
Probing Majorana Modes via Local Spin Dynamics
Johannes Bjerlin, Anders S. Sørensen, Stephan Haas
We investigate Majorana modes in a quantum spin chain with bond-dependent exchange interactions by studying its dynamics. Specifically, we consider two-time correlations for the Ki…
Observing the emergence of a quantum phase transition -- shell by shell
Luca Bayha, Marvin Holten, Ralf Klemt +6
Many-body physics describes phenomena which cannot be understood looking at a systems' constituents alone. Striking manifestations are broken symmetry, phase transitions, and colle…
Dipolar particles in a double-trap confinement: Response to tilting the dipolar orientation
J. Bjerlin, J. Bengtsson, F. Deuretzbacher +2
We analyze the microscopic few-body properties of dipolar particles confined in two parallel quasi-one-dimensional harmonic traps. In particular, we show that an adiabatic rotation…
Spin-chain model for strongly interacting one-dimensional Bose-Fermi mixtures
F. Deuretzbacher, D. Becker, J. Bjerlin +2
Strongly interacting one-dimensional (1D) Bose-Fermi mixtures form a tunable XXZ spin chain. Within the spin-chain model developed here, all properties of these systems can be calc…
Few-body precursor of the Higgs mode in a superfluid Fermi gas
J. Bjerlin, S. M. Reimann, G. M. Bruun
We demonstrate that an undamped few-body precursor of the Higgs mode can be investigated in a harmonically trapped Fermi gas. Using exact diagonalisation, the lowest monopole mode…
Antiferromagnetic Heisenberg Spin Chain of a Few Cold Atoms in a One-Dimensional Trap
Simon Murmann, Frank Deuretzbacher, Gerhard Zürn +5
We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap. These chains are stabiliz…
Density functional theory for strongly-correlated bosonic and fermionic ultracold dipolar and ionic gases
F. Malet, A. Mirtschink, C. B. Mendl +4
We introduce a density functional formalism to study the ground-state properties of strongly-correlated dipolar and ionic ultracold bosonic and fermionic gases, based on the self-c…
Quantum magnetism without lattices in strongly interacting one-dimensional spinor gases
F. Deuretzbacher, D. Becker, J. Bjerlin +2
We show that strongly interacting multicomponent gases in one dimension realize an effective spin chain, offering an alternative simple scenario for the study of one-dimensional qu…
Total Current Blockade in an Ultra-Cold Dipolar Quantum Wire
Líney Halla Kristinsdóttir, Olov Karlström, Johannes Bjerlin +4
Cold atom systems offer a great potential for the future design of new mesoscopic quantum systems with properties that are fundamentally different from semiconductor nanostructures…