64 citations · 292 across the 21 of their papers we have counts for
22 papers
Comparison of two different integration methods for the (1+1)-Dimensional Schrödinger-Poisson Equation
Nico Schwersenz, Victor Loaiza, Tim Zimmermann +2
We compare two different numerical methods to integrate in time spatially delocalized initial densities using the Schrödinger-Poisson equation system as the evolution law. The basi…
Cold atom-ion systems in radiofrequency multipole traps: event-drive molecular dynamics and stochastic simulations
Mateo Londoño, Javier Madroñero, Jesús Pérez-Ríos
We have studied the general aspects of the dynamics of an ion trapped in an ideal multipolar radiofrequency trap while interacting with a dense cold atomic gas. In particular, we h…
Neural-Network Quantum States: A Systematic Review
David R. Vivas, Javier Madroñero, Victor Bucheli +2
The so-called contemporary AI revolution has reached every corner of the social, human and natural sciences -- physics included. In the context of quantum many-body physics, its in…
The dynamics of a single trapped ion in a high density media: a stochastic approach
Mateo Londoño, Javier Madroñero, Jesús Pérez Ríos
Based on the Langevin equation, a stochastic formulation is implemented to describe the dynamics of a trapped ion in a bath of ultracold atoms, including an excess of micromotion.…
Occupation-constrained interband dynamics of a non-hermitian two-band Bose-Hubbard Hamiltonian
Manuel H. Muñoz-Arias, Carlos A. Parra-Murillo, Javier Madroñero +1
The interband dynamics of a two-band Bose-Hubbard model is studied with strongly correlated bosons forming single-site double occupancies referred to as doublons. Our model for res…
Generation of robust entangled states in a non-hermitian periodically driven two-band Bose-Hubbard system
Carlos A. Parra-Murillo, Manuel H. Muñoz-Arias, Javier Madroñero +1
A many-body Wannier-Stark system coupled to an effective reservoir is studied within a non-Hermitian approach in the presence of a periodic driving. We show how the interplay of di…
On the Activation of Quantum Nonlocality
Andrés F. Ducuara, Javier Madroñero, John H. Reina
We report on some quantum properties of physical systems, namely, entanglement, nonlocality, -copy nonlocality (superactivation of nonlocality), hidden nonlocality (activation o…
Off-resonant many-body quantum carpets in strongly tilted optical lattices
Manuel H. Muñoz-Arias, Javier Madroñero, Carlos A. Parra-Murillo
An unit filling Bose-Hubbard Hamilonian embedded in strong Stark field is studied in the off-resonant regime inhibiting single and many-particle first order tunneling resonances. W…
Chaotic level mixing in a two-band Bose-Hubbard model
C. A. Parra-Murillo, J. Madronero, S. Wimberger
We present a two-band Bose-Hubbard model which is shown to be minimal in the necessary coupling terms at resonant tunneling conditions. The dynamics of the many-body problem is stu…
Exact numerical methods for a many-body Wannier Stark system
Carlos A. Parra-Murillo, Javier Madroñero, Sandro Wimberger
We present exact methods for the numerical integration of the Wannier-Stark system in a many-body scenario including two Bloch bands. Our ab initio approaches allow for the treatme…
Quantum diffusion and thermalization at resonant tunneling
Carlos A. Parra-Murillo, Javier Madroñero, Sandro Wimberger
Nonequilibrium dynamics and effective thermalization are studied in a resonant tunneling scenario via multilevel Landau-Zener crossings. Our realistic many-body system, composed of…
Explicit schemes for time propagating many-body wavefunctions
Ana Laura Frapiccini, Aliou Hamido, Sebastian Schröter +6
Accurate theoretical data on many time-dependent processes in atomic and molecular physics and in chemistry require the direct numerical solution of the time-dependent Schrödinger…
Quantum reflection from an oscillating surface
Benedikt Herwerth, Maarten DeKieviet, Javier Madronero +1
We describe an experimentally realistic situation of the quantum reflection of helium atoms from an oscillating surface. The temporal modulation of the potential induces clear side…
Exact treatment of planar two-electron quantum dots: effects of anharmonicity on the complexity
Sebastian Schröter, Paul-Antoine Hervieux, Giovanni Manfredi +2
Static properties of an anharmonic potential model for planar two-electron quantum dots are investigated using a method which allows for the exact representation of the matrix elem…
Interaction of atomic quantum gases with a single carbon nanotube
Martin Fink, Tim-Oliver Müller, Johannes Eiglsperger +1
We study inelastic processes in the hybrid quantum system constituted by a carbon nanotube (CNT) in contact with an ultracold quantum gas, such as a cloud of thermal atoms or a Bos…
A two-band Bose-Hubbard model for many-body resonant tunneling in the Wannier-Stark system
Carlos A. Parra-Murillo, Javier Madroñero, Sandro Wimberger
We study an experimentally realizable paradigm of complex many-body quantum systems, a two-band Wannier-Stark model, for which diffusion in Hilbert space as well as many-body Landa…
Time scaling with efficient time-propagation techniques for atoms and molecules in pulsed radiation fields
Aliou Hamido, Johannes Eiglsperger, Javier Madroñero +4
We present an ab initio approach to solve the time-dependent Schrödinger equation to treat electron and photon impact multiple ionization of atoms or molecules. It combines the alr…
Spectral data for doubly excited states of helium with non-zero total angular momentum
Johannes Eiglsperger, Moritz Schönwetter, Bernard Piraux +1
A spectral approach is used to evaluate energies and widths for a wide range of singlet and triplet resonance states of helium. Data for total angular momentum is prese…
Collapse and revival in inter-band oscillations of a two-band Bose-Hubbard model
Patrick Plötz, Javier Madronero, Sandro Wimberger
We study the effect of a many-body interaction on inter-band oscillations in a two-band Bose-Hubbard model with external Stark force. Weak and strong inter-band oscillations are ob…
Thermal non-equilibrium effects in quantum reflection
Viola Druzhinina, Marcel Mudrich, Florian Arnecke +2
We show that the quantum reflection coefficient of ultracold heavy atoms scattering off a dielectric surface can be tuned in a wide range by suitable choice of surface and environm…
Atomic current across an optical lattice
Alexey V. Ponomarev, Javier Madronero, Andrey R. Kolovsky +1
We devise a microscopic model for the emergence of a collision-induced, fermionic atomic current across a tilted optical lattice. Tuning the - experimentally controllable - paramet…
Ericson fluctuations in an open, deterministic quantum system: theory meets experiment
J. Madronero, A. Buchleitner
We provide numerically exact photoexcitation cross sections of rubidium Rydberg states in crossed, static electric and magnetic fields, in quantitative agreement with recent experi…