24 citations · 135 across the 15 of their papers we have counts for
15 papers
Electron Localization in Rydberg States
Jan Mostowski, Joanna Pietraszewicz
We discuss the possibility of localizing an electron in a highly excited Rydberg state. The second-order correlation of emitted photons is the tool for the determination of electro…
Wigner Function for Harmonic Oscillator and The Classical Limit
Jan Mostowski, Joanna Pietraszewicz
The Wigner function is a quantum analogue of the classical joined distribution of position and momentum. As such is should be a good tool to study quantum-classical correspondence.…
Quantum versus classical angular momentum
Jan Mostowski, Joanna Pietraszewicz
Angular momentum in classical and quantum mechanics is carried out beyond textbooks frames. We compare angular distribution of particle position with classical probabilistic approa…
Multifaceted phase ordering kinetics of an antiferromagnetic spin-1 condensate
Joanna Pietraszewicz, Aleksandra Seweryn, Emilia Witkowska
We study phase domain coarsening in the long time limit after a quench of magnetic field in a quasi one-dimensional spin-1 antiferromagnetic condensate. We observe that the growth…
A semiclassical field theory that is freed of the ultraviolet catastrophe
Piotr Deuar, Joanna Pietraszewicz
A more accurate semiclassical theory for ultracold gases is derived, in which the occupation of high energy modes is dynamically constrained to the Bose-Einstein distribution. This…
Complex wave fields in the interacting one-dimensional Bose gas
J. Pietraszewicz, P. Deuar
We study the temperature regimes of the 1d interacting gas to determine when the matter wave (c-field) theory is, in fact, correct and usable. The judgment is made by investigating…
Mesoscopic density grains in the 1d interacting Bose gas from the exact Yang-Yang solution
Joanna Pietraszewicz, Piotr Deuar
Number fluctuations in a one-dimensional Bose gas consist of contributions from many smaller independent localized fluctuations, the density grains. We have derived a set of extend…
Classical fields in the one-dimensional Bose gas: applicability and determination of the optimal cutoff
J. Pietraszewicz, P. Deuar
To finalize information about the accuracy of the classical field approach for the 1d Bose gas, the lowest temperature quasicondensate was studied by comparing the extended Bogoliu…
Continuum of classical-field ensembles from canonical to grand canonical and the onset of their equivalence
J. Pietraszewicz, E. Witkowska, P. Deuar
The canonical and grand-canonical ensembles are two usual marginal cases for ultracold Bose gases, but real collections of experimental runs commonly have intermediate properties.…
Classical field records of a quantum system: their internal consistency and accuracy
Joanna Pietraszewicz, Piotr Deuar
We determine the regime where the widespread classical field description for quantum Bose gases is quantitatively accurate in 1d, 2d, and 3d by a careful study of the ideal gas lim…
Correlation evolution in dilute Bose-Einstein condensates after quantum quenches
Joanna Pietraszewicz, Magdalena Stobińska, Piotr Deuar
The universal forms of quantum density and phase correlations after an interaction quench are found for dilute 1d, 2d, and 3d condensates. A Bogoliubov approach in a local density…
Tunneling-Induced Restoration of the Degeneracy and the Time-Reversal Symmetry Breaking in Optical Lattices
Tomasz Sowiński, Mateusz Łacki, Omjyoti Dutta +5
We study the ground-state properties of bosons loaded into the -band of a one dimensional optical lattice. We show that the phase diagram of the system is substantially affected…
Spin dynamics of two bosons in an optical lattice site: a role of anharmonicity and anisotropy of the trapping potential
Joanna Pietraszewicz, Tomasz Sowiński, Mirosław Brewczyk +2
We study a spin dynamics of two magnetic Chromium atoms trapped in a single site of a deep optical lattice in a resonant magnetic field. Dipole-dipole interactions couple spin degr…
Two component Bose-Hubbard model with higher angular momentum states
J. Pietraszewicz, T. Sowinski, M. Brewczyk +3
We study a Bose-Hubbard Hamiltonian of ultracold two component gas of spinor Chromium atoms. Dipolar interactions of magnetic moments while tuned resonantly by ultralow magnetic fi…
Tunable dipolar resonances and Einstein-de Haas effect in a Rb-87 atoms condensate
Tomasz Swislocki, Tomasz Sowinski, Joanna Pietraszewicz +4
We study a spinor condensate of Rb-87 atoms in F = 1 hyperfine state confined in an optical dipole trap. Putting initially all atoms in mF = 1 component we observe a significant tr…