267 citations · 1.1k across the 34 of their papers we have counts for
35 papers
Quantum simulation of extended electron-phonon coupling models in a hybrid Rydberg atom setup
João Pedro Mendonça, Krzysztof Jachymski
State-of-the-art experiments using Rydberg atoms can now operate with large numbers of trapped particles with tunable geometry and long coherence time. We propose a way to utilize…
Many-body bound states and induced interactions of charged impurities in a bosonic bath
G. E. Astrakharchik, L. A. Peña Ardila, K. Jachymski +1
Induced interactions and bound states of charge carriers immersed in a quantum medium are crucial for the investigation of quantum transport. Ultracold atom-ion systems can provide…
Collisional losses of ultracold molecules due to intermediate complex formation
Krzysztof Jachymski, Marcin Gronowski, Michał Tomza
Understanding the sources of losses and chemical reactions of ultracold alkali-metal molecules is among the critical elements needed for their application in precision measurements…
Controlling the dynamics of ultracold polar molecules in optical tweezers
Marta Sroczyńska, Anna Dawid, Michał Tomza +3
Ultracold molecules trapped in optical tweezers show great promise for the implementation of quantum technologies and precision measurements. We study a prototypical scenario where…
Observation of Feshbach resonances between a single ion and ultracold atoms
Pascal Weckesser, Fabian Thielemann, Dariusz Wiater +6
Controlling physical systems and their dynamics on the level of individual quanta propels both fundamental science and quantum technologies. Trapped atomic and molecular systems, n…
Inelastic collision dynamics of a single cold ion immersed in a Bose-Einstein condensate
Thomas Dieterle, Moritz Berngruber, Christian Hölzl +4
We investigate inelastic collision dynamics of a single cold ion in a Bose-Einstein condensate. We observe rapid ion-atom-atom three-body recombination leading to formation of weak…
Transport of a single cold ion immersed in a Bose-Einstein condensate
Thomas Dieterle, Moritz Berngruber, Christian Hölzl +4
We investigate transport dynamics of a single low-energy ionic impurity in a Bose-Einstein condensate. The impurity is implanted into the condensate starting from a single Rydberg…
Ionic polaron in a Bose-Einstein condensate
G. E. Astrakharchik, L. A. Peña Ardila, R. Schmidt +2
The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a ch…
Quantum simulation of extended polaron models using compound atom-ion systems
Krzysztof Jachymski, Antonio Negretti
We consider the prospects for quantum simulation of condensed matter models exhibiting strong electron-phonon coupling using a hybrid platform of trapped laser-cooled ions interact…
Vibrational quenching of cold molecular ions immersed in their parent gas
Krzysztof Jachymski, Florian Meinert
Hybrid ion-atom systems provide an excellent platform for studies of state-resolved quantum chemistry at low temperatures, where quantum effects may be prevalent. Here we study the…
Quantum droplets in a dipolar Bose gas at a dimensional crossover
Pawel Zin, Maciej Pylak, Tomasz Wasak +2
We study the beyond-mean-field corrections to the energy of a dipolar Bose gas confined to two dimensions by a box potential with dipoles oriented in plane. At a critical strength…
Precise Feshbach resonance spectroscopy using tight anharmonic traps
Krzysztof Jachymski
Feshbach resonances are among the essential control tools used in ultracold atom experiments. However, for complex atomic species the theoretical characterization of resonances bec…
Beyond-mean-field corrections for dipolar bosons in an optical lattice
Jan Kumlin, Krzysztof Jachymski, Hans Peter Büchler
Recent experiments with ultracold lanthanide atoms which are characterized by a large magnetic moment have revealed the crucial importance of beyond-mean-field corrections in under…
Nonuniversal beyond mean field properties of quasi-two-dimensional dipolar Bose gases
Krzysztof Jachymski, Rafał Ołdziejewski
We study a quasi-two dimensional gas of bosonic dipoles, calculating the beyond mean field corrections to the ground state energy and chemical potential neglecting the transverse m…
Magnetic-field gradiometer based on ultracold collisions
Tomasz Wasak, Krzysztof Jachymski, Tommaso Calarco +1
We present a detailed analysis of the usefulness of ultracold atomic collisions for sensing the strength of an external magnetic field as well as its spatial gradient. The core ide…
Quantum state engineering with a trapped atom and a set of static impurities
Marta Sroczyńska, Tomasz Wasak, Krzysztof Jachymski +2
Hybrid systems of ultracold atoms and trapped ions or Rydberg atoms can be useful for quantum simulation purposes. By tuning the geometric arrangement of the impurities it is possi…
Cold hybrid ion-atom systems
Michał Tomza, Krzysztof Jachymski, Rene Gerritsma +4
Hybrid systems of laser-cooled trapped ions and ultracold atoms combined in a single experimental setup have recently emerged as a new platform for fundamental research in quantum…
Single-atom transistor as a precise magnetic field sensor
Krzysztof Jachymski, Tomasz Wasak, Zbigniew Idziaszek +3
Feshbach resonances, which allow for tuning the interactions of ultracold atoms with an external magnetic field, have been widely used to control the properties of quantum gases. W…
Ultracold atoms in quasi-1D traps: a step beyond the Lieb-Liniger model
Krzysztof Jachymski, Florian Meinert, Hagar Veksler +2
Ultracold atoms placed in a tight cigar-shaped trap are usually described in terms of the Lieb-Liniger model. We study the extensions of this model which arise when van der Waals i…
Properties of strongly dipolar Bose gases beyond the Born approximation
Rafał Ołdziejewski, Krzysztof Jachymski
Strongly dipolar Bose gases can form liquid droplets stabilized by quantum fluctuations. In theoretical description of this phenomenon, low energy scattering amplitude is utilized…
Inelastic collisions of ultracold triplet Rb molecules in the rovibrational ground state
Björn Drews, Markus Deiß, Krzysztof Jachymski +2
Exploring inelastic and reactive collisions on the quantum level is a main goal of the developing field of ultracold chemistry. We present first experimental studies of inelastic c…
Importance of rotationally inelastic processes in low-energy Penning ionization of CHF
Justin Jankunas, Krzysztof Jachymski, Michał Hapka +1
Low energy reaction dynamics can strongly depend on the internal structure of the reactants. The role of rotationally inelastic processes in cold collisions involving polyatomic mo…
Three-body interaction of Rydberg slow light polaritons
Krzysztof Jachymski, Przemysław Bienias, Hans Peter Büchler
We study a system of three photons in an atomic medium coupled to Rydberg states near the conditions of electromagnetically induced transparency. Based on the analytical analysis o…
Impact of overlapping resonances on magnetoassociation of cold molecules in tight traps
Krzysztof Jachymski
Overlapping Feshbach resonances are commonly observed in experiments with ultracold atoms and can influence the molecule production process. We derive an effective approach to desc…