16 citations · 51 across the 14 of their papers we have counts for
14 papers
Diffusion in interacting two-dimensional systems under a uniform magnetic field
Łukasz Iwanek, Marcin Mierzejewski, Adam S. Sajna
The dynamics of interacting particles in orbital magnetic fields are notoriously difficult to study, as this physics is inherently connected to electronic correlations in two-dimen…
Universal semiclassical dynamics in disordered two-dimensional systems
Łukasz Iwanek, Marcin Mierzejewski, Anatoli Polkovnikov +2
The dynamics of disordered two-dimensional systems is much less understood than the dynamics of disordered chains, mainly due to the lack of appropriate numerical methods. We demon…
Exposing Hypersensitivity in Quantum Chaotic Dynamics
Andrzej Grudka, Paweł Kurzyński, Adam S. Sajna +2
We demonstrate that the unitary dynamics of a multi-qubit system can display hypersensitivity to initial state perturbation. This contradicts the common belief that the classical a…
Semiclassical bounds on dynamics of two-dimensional interacting disordered fermions
Łukasz Iwanek, Marcin Mierzejewski, Anatoli Polkovnikov +2
Using the truncated Wigner approximation (TWA) we study quench dynamics of two-dimensional lattice systems consisting of interacting spinless fermions with potential disorder. Firs…
Slow semiclassical dynamics of a two-dimensional Hubbard model in disorder-free potentials
Aleksander Kaczmarek, Adam S. Sajna
The quench dynamics of the Hubbard model in tilted and harmonic potentials is discussed within the semiclassical picture. Applying the fermionic truncated Wigner approximation (fTW…
Complementarity in quantum walks
Andrzej Grudka, Pawel Kurzynski, Tomasz P. Polak +3
We study discrete-time quantum walks on -cycles with a position and coin-dependent phase-shift. Such a model simulates a dynamics of a quantum particle moving on a ring with an…
Semiclassical dynamics of a disordered two-dimensional Hubbard model with long-range interactions
Adam S. Sajna, Anatoli Polkovnikov
Quench dynamics in a two-dimensional system of interacting fermions is analyzed within the semiclassical truncated Wigner approximation (TWA). The models with short-range and long-…
Attractors and asymptotic dynamics of open discrete-time quantum walks on cycles
Adam S. Sajna, Tomasz P. Polak, Antoni Wojcik +1
Open quantum walks often lead to a classical asymptotic behavior. Here, we look for a simple open quantum walk whose asymptotic behavior can be non-classical. We consider a discret…
Assembly of 2N entangled fermions into multipartite composite bosons
Zakarya Lasmar, P. Alexander Bouvrie, Adam S. Sajna +2
An even number of fermions can behave in a bosonic way. The simplest scenario involves two fermions which can form a single boson. But four fermions can either behave as two bipart…
On dynamical stability of composite quantum particles: when entanglement is enough and when interaction is needed
Zakarya Lasmar, Adam S. Sajna, Su-Yong Lee +1
We consider an evolution of two elementary quantum particles and ask the question: under what conditions such a system behaves as a single object? It is obvious that if the attract…
Tuning linear response dynamics near the Dirac points in the bosonic Mott insulator
A. S. Sajna
Optical lattice systems offer the possibility of creating and tuning Dirac points which are present in the tight-binding lattice dispersions. For example, such a behavior can be ac…
Effect of boson on-site repulsion on the superfluidity in the boson-fermion-Hubbard model
A. S. Sajna, R. Micnas
We analyze the finite-temperature phase diagram of the boson-fermion-Hubbard model with Feshbach converting interaction, using the coherent-state path-integral method. We show that…
Finite size effects and Hofstadter butterfly in a bosonic Mott insulator with relativistic dispersion background
A. S. Sajna, T. P. Polak
Gauge potentials with different configurations have been recently realized in the optical lattice experiments. It is remarkable that one of the simplest gauge can generate particle…
Conductivity of strongly correlated bosons in optical lattices in an Abelian synthetic magnetic field
A. S. Sajna, T. P. Polak, R. Micnas
Topological phase engineering of neutral bosons loaded in an optical lattice opens a new window for manipulating of transport phenomena in such systems. Exploiting the Bose Hubbard…