191 citations · 1.3k across the 43 of their papers we have counts for
42 papers
Scissors modes in generalized Gross-Pitaevskii equations
Oleksandr V. Marchukov, Neelam Shukla, Bastien Humbert +3
We investigate scissors modes in nonlinear systems with arbitrary power-law dependence of the nonlinear term. Through analytical derivation, we establish a general expression demon…
Effective two- and three-body interactions between dressed impurities in a tilted double-well potential
F. Theel, A. G. Volosniev, D. Diplaris +3
We explore the impact and scaling of effective interactions between two and three impurity atoms, induced by a bosonic medium, on their density distributions. To facilitate the det…
From spontaneous to explicit symmetry breaking in a finite-sized system: Bosonic bound states of an impurity
L. Chergui, F. Brauneis, T. Arnone Cardinale +3
The presence of a single attractive impurity in an ultracold repulsive bosonic system can drive a transition from a homogeneous to a localized state, as we here show for a one-dime…
Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
S. I. Mistakidis, A. G. Volosniev, R. E. Barfknecht +5
Cold atomic gases have become a paradigmatic system for exploring fundamental physics, which at the same time allows for applications in quantum technologies. The accelerating deve…
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…
Generation of spin currents by a temperature gradient in a two-terminal device
R. E. Barfknecht, A. Foerster, N. T. Zinner +1
Theoretical and experimental studies of the interaction between spins and temperature are vital for the development of spin caloritronics, as they dictate the design of future devi…
Clusters in Separated Tubes of Tilted Dipoles
Jeremy R. Armstrong, Aksel S. Jensen, Artem G. Volosniev +1
A few-body cluster is a building block of a many-body system in a gas phase provided the temperature at most is of the order of the binding energy of this cluster. Here we illustra…
Induced correlations between impurities in a one-dimensional quenched Bose gas
S. I. Mistakidis, A. G. Volosniev, P. Schmelcher
We explore the time evolution of two impurities in a trapped one-dimensional Bose gas that follows a change of the boson-impurity interaction. We study the induced impurity-impurit…
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…
Universal physics of bound states of a few charged particles
C. H. Schmickler, H. -W. Hammer, A. G. Volosniev
We study few-body bound states of charged particles subject to attractive zero-range/short-range plus repulsive Coulomb interparticle forces. The characteristic length scales of th…
A Solvable Model for Decoupling of Interacting Clusters
Artem G. Volosniev, Aksel S. Jensen, Nathan L. Harshman +2
We consider M clusters of interacting particles, whose in-group interactions are arbitrary, and inter-group interactions are approximated by oscillator potentials. We show that the…
Effective approach to impurity dynamics in one-dimensional trapped Bose gases
S. I. Mistakidis, A. G. Volosniev, N. T. Zinner +1
We investigate a temporal evolution of an impurity atom in a one-dimensional trapped Bose gas following a sudden change of the boson-impurity interaction strength. Our focus is on…
Impenetrability in Floquet scattering in one dimension
A. G. Volosniev, D. H. Smith
We study the scattering off a time-periodic zero-range potential in one spatial dimension. We focus on the parameter regions that lead to zero-transmission probability (ZTP). For s…
Flow equations for cold Bose gases
A. G. Volosniev, H. -W. Hammer
We derive flow equations for cold atomic gases with one macroscopically populated energy level. The generator is chosen such that the ground state decouples from all other states i…
Integrable families of hard-core particles with unequal masses in a one-dimensional harmonic trap
N. L. Harshman, Maxim Olshanii, A. S. Dehkharghani +3
We show that the dynamics of particles in a one-dimensional harmonic trap with hard-core interactions can be solvable for certain arrangements of unequal masses. For any number of…
CONAN -- the cruncher of local exchange coefficients for strongly interacting confined systems in one dimension
N. J. S. Loft, L. B. Kristensen, A. E. Thomsen +2
We consider a one-dimensional system of particles with strong zero-range interactions. This system can be mapped onto a spin chain of the Heisenberg type with exchange coefficients…
An interpolatory ansatz captures the physics of one-dimensional confined Fermi systems
M. E. S. Andersen, A. S. Dehkharghani, A. G. Volosniev +2
Interacting one-dimensional quantum systems play a pivotal role in physics. Exact solutions can be obtained for the homogeneous case using the Bethe ansatz and bosonisation techniq…
Simulation of Time-dependent Heisenberg Models in 1D
A. G. Volosniev, H. -W. Hammer, N. T. Zinner
In this paper, we provide a theoretical analysis of strongly interacting quantum systems confined by a time-dependent external potential in one spatial dimension. We show that such…
Multicomponent Strongly Interacting Few-Fermion Systems in One Dimension
Artem G. Volosniev, Dmitri V. Fedorov, Aksel S. Jensen +2
The paper examines a trapped one-dimensional system of multicomponent spinless fermions that interact with a zero-range two-body potential. We show that when the repulsion between…
Quantum Impurity in a One-dimensional Trapped Bose Gas
A. S. Dehkharghani, A. G. Volosniev, N. T. Zinner
We present a new theoretical framework for describing an impurity in a trapped Bose system in one spatial dimension. The theory handles any external confinement, arbitrary mass rat…
A variational approach to repulsively interacting three-fermion systems in a one-dimensional harmonic trap
N. J. S. Loft, A. S. Dehkharghani, N. P. Mehta +2
We study a three-body system with zero-range interactions in a one-dimensional harmonic trap. The system consists of two spin-polarized fermions and a third particle which is disti…
Analytic solutions of topologically disjoint systems
J. R. Armstrong, A. G. Volosniev, D. V. Fedorov +2
We describe a procedure to solve an up to problem where the particles are separated topologically in groups with at most two particles in each. Arbitrary interactions are…
Quantum magnetism in strongly interacting one-dimensional spinor Bose systems
A. S. Dehkharghani, A. G. Volosniev, E. J. Lindgren +5
Strongly interacting one-dimensional quantum systems often behave in a manner that is distinctly different from their higher-dimensional counterparts. When a particle attempts to m…
Repulsively interacting fermions in a two-dimensional deformed trap with spin-orbit coupling
O. V. Marchukov, D. V. Fedorov, A. S. Jensen +2
We investigate a two-dimensional system of with two values of the internal (spin) degree of freedom. It is confined by a deformed harmonic trap and subject to a Zeeman field, Rashb…