A5071661243- Atomic and Molecular Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear physics research studies
- Advanced Chemical Physics Studies
- Muon and positron interactions and applications
- Quantum optics and atomic interactions
- Advanced Frequency and Time Standards
- Quantum, superfluid, helium dynamics
- Laser-Matter Interactions and Applications
- Quantum Information and Cryptography
- Quantum Chromodynamics and Particle Interactions
- Spectroscopy and Laser Applications
- Quantum chaos and dynamical systems
- Strong Light-Matter Interactions
- Nuclear Physics and Applications
- Spectroscopy and Quantum Chemical Studies
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- High-Energy Particle Collisions Research
- Crystallography and Radiation Phenomena
- Mechanical and Optical Resonators
- Quantum and electron transport phenomena
- Atomic and Subatomic Physics Research
- Chemical Thermodynamics and Molecular Structure
- X-ray Spectroscopy and Fluorescence Analysis
Joint Institute for Nuclear Research
2014-2023
Dubna State University
1990-2023
Peoples' Friendship University of Russia
2017-2019
California State University, Long Beach
2003-2004
California State University System
2003
Université Libre de Bruxelles
1996-2001
We report on the observation of confinement-induced resonances in strongly interacting quantum-gas systems with tunable interactions for one- and two-dimensional geometry. Atom-atom scattering is substantially modified when $s$-wave length approaches scale associated tight transversal confinement, leading to characteristic loss heating signatures. Upon introducing an anisotropy confinement we observe a splitting resonance. With increasing additional appear. In limit system find that one...
Abstract We investigate the breakup of $^{11}$Be halo nuclei on a light target ($^{12}$C) within quantum-quasiclassical approach in wide range beam energy (5–67 MeV/nucleon) including bound states and low-lying resonances different partial spin $^{11}$Be. The obtained results are good agreement with existing experimental data at 67 MeV/nucleon. also demonstrate that developed computational scheme can be used for investigation spectral properties low-energy experiments targets.
We develop a nonperturbative theoretical framework to treat collisions with generic anisotropic interactions in quasi-one-dimensional geometries. Our method avoids the limitations of pseudopotential theory and allows us include accurately long-range interactions. For ultracold dipolar harmonic waveguide we predict confinement-induced resonances (DCIRs) which are attributed different angular momentum states. The analytically derived resonance condition reveals detail interplay confinement...
We demonstrate that scattering of particles strongly interacting in three dimensions (3D) can be suppressed at low energies a quasi-one-dimensional (1D) confinement. The underlying mechanism is the interference s- and p-wave contributions with large 3D lengths being necessary prerequisite. This low-dimensional quantum effect might useful "interacting" quasi-1D ultracold atomic gases, guided atom interferometry, impurity confined wire-based electronic devices.
We develop a grid method for multichannel scattering of atoms in waveguide with harmonic confinement. This approach is employed to extensively analyze the transverse excitations and deexcitations as well resonant processes. Collisions identical bosonic fermionic distinguishable traps single frequency $\ensuremath{\omega}$ permitting center-of-mass (c.m.) separation are explored depth. In zero-energy limit mode regime we reproduce well-known confinement-induced resonances (CIRs) bosonic,...
A wave-packet propagation method is developed and applied to investigate the quantum dynamics of scattering processes identical distinguishable atoms in harmonic waveguides. The confinement-induced resonances (CIRs) for ultracold collisions particles, $s$-wave CIRs bosons $p$-wave fermions, explored detail. Our multigrid approach allows us fully take into account coupling between center-of-mass (c.m.) relative motions case atoms. latter includes, particular, $s$- $p$-partial-wave mixing,...
We investigate confinement-induced resonances in a system composed of tightly trapped ion and moving atom waveguide. determine the conditions for appearance such broad region---from ``long-wavelength'' limit to opposite case when typical length scale atom-ion polarization potential essentially exceeds transverse waveguide width. find considerable dependence resonance position on atomic mass which, however, disappears ``long-wavelength zero-energy'' limit, where known result confined...
We give a solution of the three-dimensional Schr\"odinger equation for electron hydrogen atom in external electric and magnetic fields arbitrary mutual orientation. The rearrangement energy spectrum due to changing orientation is evaluated by using n=2 multiplet as an example. calculations agree with second-order perturbation formulas that exist special cases mutually parallel orthogonal fields. For another two-dimensional case which currently being extensively investigated, namely, strong...
We analyze the impact of multichannel scattering in harmonic waveguides on positions and widths confinement-induced resonances for both isotropic anisotropic transversal confinement. Multichannel amplitudes transmission coefficients are calculated used to characterize resonant behaviour atomic collisions with varying anisotropy. A mechanism is established which leads a splitting resonance presence
Using a recently developed approach for treating the three-dimensional anisotropic scattering we find considerable influence of nonresonant laser field with intensity I> or =10(5) W/cm(2) on Cs-Cs ultracold collisions. Strong dependence wavelength lambda(L) is shown at optical region as becomes shorter than critical value lambda(0) approximately 3000 nm (of atomic de Broglie wave lambda) defining lambda(0)< =lambda s-wave domination in absence external field. Dependence polarization also...
We explore the quantum dynamics of heteronuclear atomic collisions in waveguides and demonstrate existence a novel mechanism for resonant formation polar molecules. The molecular probabilities can be tuned by changing trap frequencies that characterize transverse modes species. origin this effect is confinement-induced mixing relative center mass motions collision process leading to coupling diatomic continuum excited states closed channels.
Diffusion of muonic deuterium \ensuremath{\mu}d and hydrogen \ensuremath{\mu}p atoms produced following the stopping negative muons in ${\mathrm{D}}_{2}$ or ${\mathrm{H}}_{2}$ at 300 K was studied pressures 47--750 mbar (${\mathrm{H}}_{2}$) 94--1520 (${\mathrm{D}}_{2}$) two distinct target geometries. Time intervals were recorded between entry into gas arrival each resulting atom one 50 foils immersed gas, spaced regularly along muon beam axis. The results such measurements fitted to time...
We investigate the quantum dynamics of two interacting bosonic atoms confined in a one-dimensional anharmonic trap. The tunneling rate, an experimentally measurable parameter system, was calculated as function effective coupling interatomic constant $g$ from ground (n=N=0) and first excited atomic states trap with respect to relative (n=2,N=0) center-of-mass (n=0,N=2) motion. This allows initial population pair correlation, well $g$, system by comparing rate experimental one. have observed...
We study the quantum scattering in two spatial dimensions (2D). Our computational scheme allows to quantitatively analyze parameters for strong anisotropy of interaction potential. High efficiency method is demonstrated 2D on cylindrical potential with elliptical base and dipole-dipole collisions plane. reproduce result polarized dipoles binary obtained recently by Ticknor [Phys. Rev. A {\bf 84}, 032702 (2011)] unpolarized dipoles.