A5014675722- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Chemical Physics Studies
- Theoretical and Computational Physics
- Spectroscopy and Quantum Chemical Studies
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Granular flow and fluidized beds
- Advanced Thermodynamics and Statistical Mechanics
- Physics of Superconductivity and Magnetism
- Gas Dynamics and Kinetic Theory
- Advanced Frequency and Time Standards
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
- Scientific Research and Discoveries
- Astro and Planetary Science
- Statistical Mechanics and Entropy
- Rock Mechanics and Modeling
- Complex Network Analysis Techniques
- Distributed and Parallel Computing Systems
- Computational Physics and Python Applications
- Electrostatics and Colloid Interactions
- Spectroscopy and Laser Applications
- Material Dynamics and Properties
Institute of Physics Belgrade
2009-2024
University of Belgrade
2011-2024
Zemun Hospital
2010
Institute of Physics of the Slovak Academy of Sciences
1999-2002
University of Oslo
2000
The Abdus Salam International Centre for Theoretical Physics (ICTP)
1994-1995
University of Illinois Urbana-Champaign
1989-1992
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
Abstract We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning status of cold atom technologies, prospective scientific and societal opportunities offered by their deployment space, developments needed before atoms could be operated space. The technologies discussed include atomic clocks, quantum gravimeters accelerometers, interferometers. Prospective applications metrology, geodesy measurement terrestrial mass change due to, e.g., climate change,...
The density of accessible levels at low spin in the ${(}^{3}\mathrm{He},\ensuremath{\alpha}\ensuremath{\gamma})$ reaction has been extracted for ${}^{161,162}\mathrm{Dy}$ and ${}^{171,172}\mathrm{Yb}$ nuclei. entropy even-odd even-even nuclei deduced as a function excitation energy. one quasiparticle outside an core is found to be 1.70(15) ${k}_{B}.$ This picture hot well accounted within simple pairing model. onset two, four, six excitations ${}^{162}\mathrm{Dy}$ ${}^{172}\mathrm{Yb}$...
We present a new analytical method that systematically improves the convergence of path integrals generic $N$-fold discretized theory. Using it we calculate effective actions ${S}^{(p)}$ for $p\ensuremath{\le}9$, which lead to same continuum amplitudes as starting action, but converge limit $1/{N}^{p}$. checked this derived speedup in by performing Monte Carlo simulations on several different models.
We investigate finite-size scaling in percolating widthless stick systems with variable aspect ratios an extensive Monte Carlo simulation study. A generalized function is introduced to describe the behavior of percolation distribution moments and probability at threshold. show that prefactors depend on system ratio exhibit features are generic whole class systems. In particular, we demonstrate existence a characteristic for which threshold scale invariant definite parity first two moments.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new method for the instant preparation of large unilamellar vesiclesD. D. Lasic, A. Belic, and T. ValentincicCite this: J. Am. Chem. Soc. 1988, 110, 3, 970–971Publication Date (Print):February 1988Publication History Published online1 May 2002Published inissue 3 February 1988https://pubs.acs.org/doi/10.1021/ja00211a049https://doi.org/10.1021/ja00211a049research-articleACS PublicationsRequest reuse permissionsArticle...
We study, by numerical simulation, the compaction dynamics of frictional hard disks in two dimensions, subjected to vertical shaking. Shaking is modeled a series expansion disk packing, followed dynamical recompression assembly under action gravity. The second phase shake cycle based on an efficient event-driven molecular-dynamics algorithm. analyze for various values friction coefficient and normal restitution. find that time evolution density described...
In this paper, building on a previous analysis [1] of exact diagonalization the space-discretized evolution operator for study properties non-relativistic quantum systems, we present substantial improvement to method. We apply recently introduced effective action approach obtaining short-time expansion propagator up very high orders calculate matrix elements operator. This improves by many magnitude previously used approximations discretized and allows us numerically obtain large numbers...
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
In this and the subsequent paper (Balaž et al 2011 J. Stat. Mech. P03005) we develop a recursive approach for calculating short-time expansion of propagator general quantum system in time-dependent potential to orders that have not been accessible before. To end is expressed terms discretized effective potential, which derive analytically solve set efficient recursion relations. Such can be used substantially speed up numerical Monte Carlo simulations path integrals, or various analytic...
Based on a previously developed recursive approach for calculating the short-time expansion of propagator systems with time-independent potentials and its time-dependent generalization simple single-particle systems, in this paper we present full extension formalism to general quantum system many degrees freedom potential.Furthermore, also velocity-independent part effective potential, which is necessary diagonal amplitudes partition functions, as well an from imaginary-time real-time one,...
Variational Monte Carlo method is used to calculate ground state properties of $^{4}\mathrm{He}$ droplets, containing 70, 112, 168, 240, 330, and 728 particles. The resulting particle kinetic energy densities are as an input in the Feynman-Lekner theory for $^{3}\mathrm{He}$ impurities. density atoms surface states compared with results previous phenomenological calculations.
We present and discuss a detailed derivation of an analytical method that systematically improves the convergence path integrals generic $N$-fold discretized theory. develop explicit procedure for calculating set effective actions ${S}^{(p)}$, $p=1,2,3,\dots{}$ which have property they lead to same continuum amplitudes as starting action, but converge limit ever faster. Discretized calculated using $p$-level action differ from by term order $1∕{N}^{p}$. obtain expressions levels...
We analyze the method for calculation of properties nonrelativistic quantum systems based on exact diagonalization space-discretized short-time evolution operators. In this paper we present a detailed analysis errors associated with space discretization. Approaches using direct real-space discretized Hamiltonians lead to polynomial in discretization spacing $\ensuremath{\Delta}$. Here show that operators leads substantially smaller errors, vanishing exponentially...
We introduce and analyze an interesting quantity, the path integral ideal, governing flow of generic discrete theories to continuum limit greatly increasing their convergence. The said is classified according degree divergence potential at spatial infinity. Studying asymptotic behavior ideals we isolate dominant terms in effective that determine a theory for large time steps.
Kinetics of the deposition process $k$-mers in presence desorption or/and diffusional relaxation particles is studied by Monte Carlo method on a one-dimensional lattice. For reversible $k$-mers, we find that after initial ``jamming,'' stretched exponential growth coverage $\ensuremath{\theta}(t)$ toward steady-state value ${\ensuremath{\theta}}_{eq}$ occurs, i.e.,...
We present Path Integral Monte Carlo C code for calculation of quantum mechanical transition amplitudes 1D models. The SPEEDUP is based on the use higher-order short-time effective actions and implemented to maximal order $p$=18 in time propagation (Monte step), which substantially improves convergence discretized their exact continuum values. Symbolic derivation Mathematica codes, using recursive Schroedinger equation approach. In addition general theory, developed codes are capable...
Generalized random sequential adsorption (RSA) of polydisperse mixtures k-mers on a one-dimensional lattice is studied numerically by means Monte Carlo simulations. The kinetics the deposition process for irreversible case, adsorption–desorption processes and case where adsorption, desorption diffusion are present simultaneously. We concentrate here influence number mixture components length making up temporal behavior coverage fraction θ(t). approach θ(t) to jamming limit θjam in RSA found...
We study the dynamic structure function S(k,\ensuremath{\omega}) of Bose liquids in asymptotic limit k,\ensuremath{\omega}\ensuremath{\rightarrow}\ensuremath{\infty} at constant y==(m/k)(\ensuremath{\omega}-${\mathit{k}}^{2}$/2m), using orthogonal correlated basis Feynman phonon states. This approach has been traditionally and successfully used to small k,\ensuremath{\omega}, it appears possible develop further obtain a unified theory all k \ensuremath{\omega}. In present work, we prove...