P. Ziń
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View article: Dipolar Droplets at 3D-1D Crossover
Dipolar Droplets at 3D-1D Crossover Open
We investigate beyond-mean-field corrections to the energy of an elongated homogeneous Bose gas strongly confined in two directions, with dipoles aligned along the long axis of the system. When the dipolar interaction reaches its critical …
View article: Localized States in a Periodic Potential with Harmonic Confinement
Localized States in a Periodic Potential with Harmonic Confinement Open
We analyze the one-dimensional problem of a particle placed in periodic potential with additional harmonic trapping within tight-binding approximation. We find the eigenstates localized on the sides of the harmonic trapping potential. We s…
View article: Self-consistent description of Bose–Bose droplets: modified gapless Hartree–Fock–Bogoliubov method
Self-consistent description of Bose–Bose droplets: modified gapless Hartree–Fock–Bogoliubov method Open
We define a formalism of a self-consistent description of the ground state of a weakly interacting Bose system, accounting for higher order terms in expansion of energy in the diluteness parameter. The approach is designed to be applied to…
View article: Self-consistent description of Bose-Bose droplets: Harmonically trapped quasi-two-dimensional droplets
Self-consistent description of Bose-Bose droplets: Harmonically trapped quasi-two-dimensional droplets Open
We describe a quantum droplet of a Bose-Bose mixture squeezed by an external\nharmonic forces in one spatial direction. Our approach is based on the\nself-consistent method formulated in [1]. The true spatial droplet profile in\nthe direct…
View article: Proof the non-existence of causal classical electrodynamics of point charged particles
Proof the non-existence of causal classical electrodynamics of point charged particles Open
Up until now, a consistent causal theory of point charged particles (for example electrons) interacting with electromagnetic field is not known. The well-known problem is that the standard Lorentz force alone (in the case of point particle…
View article: Self-consistent Description of Bose-Bose Droplets: Harmonically Trapped Quasi-2D Droplets
Self-consistent Description of Bose-Bose Droplets: Harmonically Trapped Quasi-2D Droplets Open
We describe a quantum droplet of a Bose-Bose mixture squeezed by an external harmonic forces in one spatial direction. Our approach is based on the self-consistent method formulated in [1]. The true spatial droplet profile in the direction…
View article: Quantum droplets in a dipolar Bose gas at a dimensional crossover
Quantum droplets in a dipolar Bose gas at a dimensional crossover Open
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 such that their interaction is anisotropic in the two unconfined dimensions. At a c…
View article: Zero-energy modes of two-component Bose–Bose droplets
Zero-energy modes of two-component Bose–Bose droplets Open
Bose–Bose droplets are self-bound objects emerging from a mixture of two interacting Bose–Einstein condensates when their interactions are appropriately tuned. During droplet formation three continuous symmetries of the system’s Hamiltonia…
View article: Revisiting a stability problem of two-component quantum droplets
Revisiting a stability problem of two-component quantum droplets Open
We study the problem of the stability of a two-component droplet. The\nstandard solution known from the literature is based on a particular form of\nthe mean field energy functional, in particular on distinction of hard mode and\nsoft mode…
View article: Pair correlation of atoms scattered from colliding Bose-Einstein quasicondensates
Pair correlation of atoms scattered from colliding Bose-Einstein quasicondensates Open
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View article: Self-bound Bose–Fermi liquids in lower dimensions
Self-bound Bose–Fermi liquids in lower dimensions Open
We study weakly interacting mixtures of ultracold atoms composed of bosonic and fermionic species in 2D and 1D. When interactions between particles are appropriately tuned, self-bound quantum liquids can be formed. We show that while forma…
View article: Quantum Bose-Bose droplets at a dimensional crossover
Quantum Bose-Bose droplets at a dimensional crossover Open
We study a liquid quantum droplets in a mixture of two-component\nBose-Einstein condensates under a variable confinement introduced along one or\ntwo spatial dimensions. Despite the atom-atom scattering has a\nthree-dimensional character, …
View article: Influence of the interaction between quasiparticles on parametric resonance in Bose-Einstein quasicondensates
Influence of the interaction between quasiparticles on parametric resonance in Bose-Einstein quasicondensates Open
We perform a simulation of the experiment [1] where the temporal modification of the effective one dimensional interaction constant was used to create pairs of atoms with opposite velocities. The simulations clearly demonstrate huge impact…
View article: Properties of atomic pairs produced in the collision of Bose-Einstein condensates
Properties of atomic pairs produced in the collision of Bose-Einstein condensates Open
Collisions of Bose-Einstein condensates can be used as a mean to generate\ncorrelated pairs of atoms. The scattered massive particles, in analogy to\nphoton pairs in quantum optics, might be used in the violation of Bell's\ninequalities, d…
View article: The influence of the interaction between quasiparticles on parametric resonance in Bose–Einstein condensates
The influence of the interaction between quasiparticles on parametric resonance in Bose–Einstein condensates Open
We analyze the uniform system of weakly interacting bosonic gas undergoing\nperiodic oscillation of interaction constant. This, within Bogoliubov\napproximation, leads to creation of atom pairs with well defined opposite\nvelocities. We sh…