Log in

Relevant bibliographies by topics / Many-particle system / Journal articles

To see the other types of publications on this topic, follow the link: Many-particle system.

Journal articles on the topic 'Many-particle system'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Many-particle system.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Bornath, Th, D. Kremp, and M. Schlanges. "Two-particle problem in a nonequilibrium many-particle system." Physical Review E 60, no. 6 (December 1, 1999): 6382–94. http://dx.doi.org/10.1103/physreve.60.6382.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Kraeft, W. D., D. Kremp, K. Kilimann, and H. E. DeWitt. "Two-body problem in a many-particle system." Physical Review A 42, no. 4 (August 1, 1990): 2340–45. http://dx.doi.org/10.1103/physreva.42.2340.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

LIU, YU-LIANG. "APPLICATION OF EIGENFUNCTIONAL THEORY ON QUANTUM MANY-PARTICLE SYSTEMS." International Journal of Modern Physics B 16, no. 27 (October 30, 2002): 4127–63. http://dx.doi.org/10.1142/s0217979202014693.

Full text

Abstract:

We first introduce the basic ingredients of the eigenfunctional theory, and show that a D-dimensional quantum many-particle system is mapped into a (D+1)-dimensional time-depending single-particle problem, and in the representation of the eigenfunctionals of the particle propagator, the particles become free. Then using this method, we study five kinds of quantum many-particle systems: interacting boson system, repulsive, attractive interacting fermion systems, Hubbard model and single-impurity scattering in one-dimensional fermion system, and demonstrate that the microscopic Bogoliubov theory and the phenomenological Bijl–Feynman theory of the bosons are closely related, and apart from an anti-symmetry factor Det ‖eikj·xl‖ the ground state wave function of the repulsive interacting fermion system has a similar form to that of the interacting boson system. Moreover, we show that the attractive interacting fermion system has a sound-type excitation spectrum like that in the interacting boson system. For one-dimensional Hubbard model we calculate the electron Green's function, and charge and spin density–density correlation functions which are consistent with the exact ones obtained by the Bethe ansatz and numerical calculations, and show that the ground state energy is increasing with U, and the electrons has single-occupied constraint in the large U limit. Finally, we demonstrate clearly the evolution of the system from its ultraviolet fixed point to infrared critical fixed point as the impurity potential increases. At the infrared critical fixed point, the fermion Green's function shows that the fermions are completely reflected on the impurity site.

APA, Harvard, Vancouver, ISO, and other styles

4

Noh, Hyun Sik, Chul Koo Kim, and Kyun Nahm. "Functional Schrödinger picture approach to a many-particle system." Physics Letters A 204, no. 2 (August 1995): 162–68. http://dx.doi.org/10.1016/0375-9601(95)00449-d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Lev, B. I., and A. G. Zagorodny. "Statistical Description of Non-Equilibrium Many-Particle Systems." Ukrainian Journal of Physics 65, no. 12 (December 18, 2020): 1056. http://dx.doi.org/10.15407/ujpe65.12.1056.

Full text

Abstract:

In most cases, the systems of interacting particles are non-equilibrium. In this review, a new approach based on the application of a non-equilibrium statistical operator is presented, which allows the inhomogeneous distributions of the particles and the temperature to be taken into account. The method uses the saddle-point procedure to find dominant contributions to the partition function of the system and enables all of its thermodynamic parameters to be determined. Probable peculiarities in the behavior of the systems with interaction – such as gravitational systems, systems with Coulombic repulsion, and so forth – under various thermodynamic conditions are predicted. A new approach is proposed to describe non-equilibrium systems in the energy space, which is an extension of the Gibbs approach to macroscopic systems under non-equilibrium conditions. It allows the stationary states and the dynamics of non-equilibrium systems to be described.

APA, Harvard, Vancouver, ISO, and other styles

6

Stańczy, R. "The existence of equilibria of many-particle systems." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 139, no. 3 (May 26, 2009): 623–31. http://dx.doi.org/10.1017/s0308210508000413.

Full text

Abstract:

In this paper we obtain the existence of a radial solution for some elliptic non-local problem with constraints. The problem arises from some mean field equation which models, among other things, a system of self-gravitating particles when one looks for its stationary solutions. We include the cases of Maxwell—Boltzmann, Fermi—Dirac and polytropic statistics.

APA, Harvard, Vancouver, ISO, and other styles

7

Avery, John. "Orbital angular momentum eigenfunctions for many-particle systems." Canadian Journal of Chemistry 63, no. 7 (July 1, 1985): 1719–22. http://dx.doi.org/10.1139/v85-289.

Full text

Abstract:

Methods are presented for constructing eigenfunctions of the total orbital angular momentum operator of a many-particle system without the use of the Clebsch–Gordan coefficients. One of the equations derived in this paper is analogous to Dirac's identity for total spin; and through this equation, a connection is established between eigenfunctions of L2 and irreducible representations of the symmetric group Sn.

APA, Harvard, Vancouver, ISO, and other styles

8

CELEGHINI, ENRICO, and MARIO RASETTI. "MANY-PARTICLE QUANTUM STATISTICS AND CO-ALGEBRA." International Journal of Modern Physics B 10, no. 13n14 (June 30, 1996): 1625–36. http://dx.doi.org/10.1142/s0217979296000714.

Full text

Abstract:

Duplication of the space of states, peculiar of Thermo-field Dynamics, is related to fundamental physical concepts such as the idea of “isolated system”. By a correct mathematical description of such doubling of the Fock space in terms of co-algebra, the algebra h(1) and its quantum deformation hq(1) are shown to pertain to classical objects rather than to bosons, which are instead properly described by su(1, 1). In addition new statistics are introduced, connected to the graded algebra osp(1|2) and the q-algebras suq(1, 1) and ospq(1|2).

APA, Harvard, Vancouver, ISO, and other styles

9

Dinariev, O. Yu. "Nonlocal hydrodynamics of a many-particle quantum system at zero temperature." Russian Physics Journal 40, no. 8 (August 1997): 741–45. http://dx.doi.org/10.1007/bf02508802.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Berman, G. P., and A. M. Kagansky. "Stochasticity in a many-particle system with finite time of interaction." Physics Letters A 107, no. 3 (January 1985): 115–19. http://dx.doi.org/10.1016/0375-9601(85)90727-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Moore, R. A., T. C. Scott, and M. B. Monagan. "A model for a relativistic, many-particle Lagrangian with electromagnetic interactions." Canadian Journal of Physics 66, no. 3 (March 1, 1988): 206–11. http://dx.doi.org/10.1139/p88-032.

Full text

Abstract:

It is shown that the Fokker–Wheeler–Feynman theory for the relativistic modelling of a system of massive, charged, point particles interacting via action-at-a-distance forces, electromagnetic in origin, can be reformulated and reinterpreted so that it retains all of its required physical attributes but is devoid of the absurdities originally ascribed to it. That is, Lorentz covariance, time-reversal symmetry, and particle-interchange symmetry are maintained, whereas lack of causality and the paradox of "discontinuous" forces are removed. The reformulated theory yields a physically acceptable relativistic, many-particle Lagrangian. The Euler–Lagrange equations of motion can be written down for either closed or open systems. For closed systems, a generalized Hamiltonian, linear momentum, and angular momentum are constants of the motion. The concept of an open system is used to show that radiation reaction follows straightforwardly from the Euler–Lagrange equations of motion and their past and present time solutions. It is concluded that the basis for this type of modelling of such systems is now established.

APA, Harvard, Vancouver, ISO, and other styles

12

Bogolubov, N. N. Jr, M. Yu Rasulova, and I. A. Tishabaev. "Solution of Generalized Jaynes-Cummings Model for many Particle Systems." Applied Mechanics and Materials 481 (December 2013): 272–77. http://dx.doi.org/10.4028/www.scientific.net/amm.481.272.

Full text

Abstract:

We consider the dynamics of a system consisting of N two-level atoms interacting with a multi-mode cavity field. For the given system, the generalized kinetic equation is obtained and conditions are given under which its solution is reduced to solution of a linear equation, and of the one-dimensional nonlinear Schrodinger equation, respectively.

APA, Harvard, Vancouver, ISO, and other styles

13

Ferrer, E. J., V. de la Incera, and A. E. Shabad. "Phase transitions of the many-particle Weinberg-Salam system at finite temperature." Nuclear Physics B 309, no. 1 (October 1988): 120–44. http://dx.doi.org/10.1016/0550-3213(88)90235-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Takahashi, K., and T. Tsukamoto. "Semiclassical Aspect of Collective Motion in a Layer-Structured Many Particle System." Progress of Theoretical Physics 88, no. 4 (October 1, 1992): 781–84. http://dx.doi.org/10.1143/ptp/88.4.781.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Jeknić-Dugić, J., M. Arsenijević, and M. Dugić. "A local-time-induced unique pointer basis." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470, no. 2171 (November 8, 2014): 20140283. http://dx.doi.org/10.1098/rspa.2014.0283.

Full text

Abstract:

There is a solution to the problem of asymptotic completeness in many-body scattering theory that offers a specific view of the quantum unitary dynamics which allows for the straightforward introduction of local time for every, at least approximately closed, many-particle system. In this approach, time appears as a hidden classical parameter of the unitary dynamics of a many-particle system. We show that a closed many-particle system can exhibit behaviour that is characteristic for open quantum systems and there is no need for the ‘state collapse’ or environmental influence. On the other hand, closed few-particle systems bear high quantum coherence. This local-time scheme encompasses concepts including ‘emergent time’, ‘relational time’ as well as the ‘hybrid system’ models with possibly induced gravitational uncertainty of time.

APA, Harvard, Vancouver, ISO, and other styles

16

Schroeder, Daniel, and Howard J. Hamilton. "Desirable Elements for a Particle System Interface." International Journal of Computer Games Technology 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/623809.

Full text

Abstract:

Particle systems have many applications, with the most popular being to produce special effects in video games and films. To permit particle systems to be created quickly and easily, Particle System Interfaces (PSIs) have been developed. A PSI is a piece of software designed to perform common tasks related to particle systems for clients, while providing them with a set of parameters whose values can be adjusted to create different particle systems. Most PSIs are inflexible, and when clients require functionality that is not supported by the PSI they are using, they are forced to either find another PSI that meets their requirements or, more commonly, create their own particle system or PSI from scratch. This paper presents three original contributions. First, it identifies 18 features that a PSI should provide in order to be capable of creating diverse effects. If these features are implemented in a PSI, clients will be more likely to be able to accomplish all desired effects related to particle systems with one PSI. Secondly, it introduces a novel use of events to determine, at run time, which particle system code to execute in each frame. Thirdly, it describes a software architecture called the Dynamic Particle System Framework (DPSF). Simulation results show that DPSF possesses all 18 desirable features.

APA, Harvard, Vancouver, ISO, and other styles

17

Testa, Bernard, Lemont Kier, Chun-Kao Cheng, and Joachim Mayer. "A Cellular Automata Study of Constraints (Dissolvence) in a Percolating Many-Particle System." Entropy 3, no. 2 (April 11, 2001): 27–57. http://dx.doi.org/10.3390/e3020027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Campo, Adolfo del. "Exact quantum decay of an interacting many-particle system: the Calogero–Sutherland model." New Journal of Physics 18, no. 1 (January 19, 2016): 015014. http://dx.doi.org/10.1088/1367-2630/18/1/015014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Takizawa, Hiroshi, and Akihide Oguchi. "Variational Method for the Ground State Energy of a Quantum Many-Particle System." Journal of the Physical Society of Japan 69, no. 7 (July 15, 2000): 2354–55. http://dx.doi.org/10.1143/jpsj.69.2354.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Adams, Stefan, Andrea Collevecchio, and Wolfgang König. "A variational formula for the free energy of an interacting many-particle system." Annals of Probability 39, no. 2 (March 2011): 683–728. http://dx.doi.org/10.1214/10-aop565.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Trukhanova, Mariya Iv. "Energy evolution in many-particle quantum hydrodynamics of spinning plasmas." Modern Physics Letters B 30, no. 04 (February 10, 2016): 1650023. http://dx.doi.org/10.1142/s0217984916500238.

Full text

Abstract:

In this paper, we develop a quantum hydrodynamics (QHD) method for the research of the quantum evolution of a system of spinning particles. We derived the fundamental equation for charged and neutral spinning particles — the energy evolution equation from the many-particle microscopic Schrödinger equation with a spin–spin and Coulomb modified Hamiltonian. We derive the spin contributions to the energy evolution equation, thermal energy and thermal energy current.

APA, Harvard, Vancouver, ISO, and other styles

22

Skorokhod, Anatoli V. "On the regularity of many-particle dynamical systems perturbed by white noise." Journal of Applied Mathematics and Stochastic Analysis 9, no. 4 (January 1, 1996): 427–37. http://dx.doi.org/10.1155/s1048953396000378.

Full text

Abstract:

We consider a system of finite number of particles that are moving in Rd under mutual interaction. It is assumed that the particles are subjected to some additional random forces which cause diffusion motion of the particles. The latter is described by a system of stochastic differential equations of the first order for noninertia particles and the second order for inertial particles. The coefficient of the system are unbounded because the interaction force tends to infinity if the distance between two particles tends to zero. The system is called regular if no particle can hit the other. We investigate conditions of regularity.This article is dedicated to the memory of Roland L. Dobrushin.

APA, Harvard, Vancouver, ISO, and other styles

23

Jiao, Zhun, and Rong Zhang. "Improved Particle Filter for Integrated Navigation System." Applied Mechanics and Materials 543-547 (March 2014): 1278–81. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.1278.

Full text

Abstract:

As a new method for dealing with any nonlinear or non-Gaussian distributions, based on the Monte Carlo methods and Bayesian filtering, particle filters (PF) are favored by researchers and widely applied in many fields. Based on particle filtering, an improved particle filter (IPF) proposal distribution is presented. Evaluation of the weights is simplified and other improved techniques including the residual resampling step and Markov Chain Monte Carlo method are introduced for SINS/GPS integrated navigation system. The simulation results confirm that the improved particle filter outperforms the others.

APA, Harvard, Vancouver, ISO, and other styles

24

Ivanov, Anton Valerievich. "Approximation of many-particle distribution functions for ferromagnetics with different crystal lattices." Keldysh Institute Preprints, no. 11 (2021): 1–22. http://dx.doi.org/10.20948/prepr-2021-11.

Full text

Abstract:

We propose the new system of equations for magnetodynamics. Thus we call the new system of equations correlational magnetodynamics system (CMD). It consists of well known Landau–Lifshitz–Bloch(LLB) equation complemented with an equation for two-particles correlations. It is based on BBGKY hierarchy, the key issue is the approximation of the many-particle distribution functions taking into account the correlations between the nearest neighbors for different (primitive, body-centered and face-centered) crystal lattices. Compared to traditional LLB equation, numerical simulations with CMD produces results that are closer to atomistic simulations.

APA, Harvard, Vancouver, ISO, and other styles

25

GRILLAKIS, MANOUSSOS G., and DIONISIOS MARGETIS. "A PRIORI ESTIMATES FOR MANY-BODY HAMILTONIAN EVOLUTION OF INTERACTING BOSON SYSTEM." Journal of Hyperbolic Differential Equations 05, no. 04 (December 2008): 857–83. http://dx.doi.org/10.1142/s0219891608001726.

Full text

Abstract:

We study the evolution of a many-particle system whose wave function obeys the N-body Schrödinger equation under Bose symmetry. The system Hamiltonian describes pairwise particle interactions in the absence of an external potential. We derive a priori dispersive estimates that express the overall repulsive nature of the particle interactions. These estimates hold for a wide class of two-body interaction potentials which are independent of the particle number, N. We discuss applications of these estimates to the BBGKY hierarchy for reduced density matrices analyzed by Elgart, Erdős, Schlein and Yau.

APA, Harvard, Vancouver, ISO, and other styles

26

Musumbu, Dibwe Pierrot, Maria Przybylska, and Andrzej J. Maciejewski. "Probing the Eigenstates Thermalization Hypothesis with Many-Particle Quantum Walks on Lattices." Open Systems & Information Dynamics 24, no. 02 (June 2017): 1750007. http://dx.doi.org/10.1142/s123016121750007x.

Full text

Abstract:

We simulate the dynamics of many-particle system of bosons and fermions using discrete time quantum walks on lattices. We present a computational proof of the behaviour of the simulated systems similar to the one observed in Hamiltonian dynamics during quantum thermalization. We record the time evolution of the entropy and the temperature of a specific particle configuration during the entire dynamics and observe how they relax to a state which we call the quantum walk thermal state. This observation is made on two types of lattices while simulating different numbers of particles walking on two grid graphs with 25 vertices. In each case, we observe that the vertices counting statistics, the temperature of the indexed configuration and the dimension of the effective configuration Hilbert space relax simultaneously and remain relaxed for the rest of the many-particle quantum walk.

APA, Harvard, Vancouver, ISO, and other styles

27

Bukowski, Robert, and Bogumil/ Jeziorski. "Nonrelativistic Lamb shift for a nonadiabatic many-particle system: An application to thedtμ ion." Physical Review A 46, no. 9 (November 1, 1992): 5437–42. http://dx.doi.org/10.1103/physreva.46.5437.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Anton, J., B. Fricke, X. Ma, X. L. Zhu, B. Li, and H. P. Liu. "The many-particle scattering system He++ on He: Experiment and a complete unified description." Physics Letters A 369, no. 1-2 (September 2007): 85–89. http://dx.doi.org/10.1016/j.physleta.2007.04.058.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Salvino, R. E. "Equilibrium statistical thermodynamics of a many-particle system coupled to an external scalar field." Physical Review A 41, no. 8 (April 1, 1990): 4236–50. http://dx.doi.org/10.1103/physreva.41.4236.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Hu, Wang, Gary G. Yen, and Guangchun Luo. "Many-Objective Particle Swarm Optimization Using Two-Stage Strategy and Parallel Cell Coordinate System." IEEE Transactions on Cybernetics 47, no. 6 (June 2017): 1446–59. http://dx.doi.org/10.1109/tcyb.2016.2548239.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Yukhnovskii, I. R., I. M. Idzyk, and V. O. Kolomiets. "Investigation of a homogeneous many-particle system in the vicinity of the critical point." Journal of Statistical Physics 80, no. 1-2 (July 1995): 405–43. http://dx.doi.org/10.1007/bf02178366.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Hyodo, Shi-aki. "Coarse-grained equation of motion for many particle system containing internal degrees of freedom." Japan Journal of Industrial and Applied Mathematics 28, no. 1 (February 25, 2011): 69–87. http://dx.doi.org/10.1007/s13160-011-0025-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Fricke, Jens. "Transport Equations Including Many-Particle Correlations for an Arbitrary Quantum System: A General Formalism." Annals of Physics 252, no. 2 (December 1996): 479–98. http://dx.doi.org/10.1006/aphy.1996.0142.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Sik Noh, Hyun, Sang Koo You, and Chul Koo Kim. "Finite Temperature Many-Particle Theory of Condensed Matter Systems in the Functional Schrödinger Picture." International Journal of Modern Physics B 11, no. 15 (June 20, 1997): 1829–37. http://dx.doi.org/10.1142/s0217979297000940.

Full text

Abstract:

A finite temperature many-particle theory of condensed matter systems is formulated using the functional Schrödinger picture. Using the interacting electron gas as a model system, we solve the equation of motion for the density matrix variationally with a Gaussian type trial density matrix. We show that the present formalism yields the finite temperature Hartree–Fock results both for the para- and ferromagnetic states in a simple and convenient fashion. Implications of the present results and future prospects are also discussed.

APA, Harvard, Vancouver, ISO, and other styles

35

STEFANESCU, E., A. SANDULESCU, and W. SCHEID. "THE COLLISIONAL DECAY OF A FERMI SYSTEM INTERACTING WITH A MANY-MODE ELECTROMAGNETIC FIELD." International Journal of Modern Physics E 09, no. 01 (February 2000): 17–50. http://dx.doi.org/10.1142/s0218301300000039.

Full text

Abstract:

We consider a system of Z fermions coupled to a dissipative environment through a two-body potential. We represent the system in a basis of single-particle, two-particle, … Z-particle excitated states. Using a procedure for averaging the rapid oscillations of the reduced density matrix in the interaction picture, the master equation of the system takes the form of a series expansion of powers of the dissipative potential matrix elements. The term of the second-order describes single-particle transitions, while the higher-order terms correspond to correlated transitions of the system particles. For the second- and the third-order terms, we derive microscopic expressions of the dissipative coefficients. For dissipative systems, when the state collectivity is broken into pieces through quantum diffusion, we use the quantum master equation of the second-order approximation. This equation satisfies basic physical conditions: particle conservation, Fermi–Dirac or Bose–Einstein distributions as asymptotic solutions of the populations, and entropy increase. On this basis, the decay of a Fermi system interacting with a many-mode electromagnetic field is described in terms of microscopic quantities: the matrix elements of the dissipative potential, the densities of the environment states, and the occupation probabilities of these states. A near-dipode–dipode interaction of the system with other neighbouring systems is taken into account. In addition to the coupling of the polarization with the population, included in the usual equations for two-level systems as a non-linear detuning, in equations for N-level systems two new couplings of the polarizations appear: a coupling due to the proximity potential, and a coupling due to the local field corrections, as a renormalization of the Rabi frequencies.

APA, Harvard, Vancouver, ISO, and other styles

36

Drossel, Barbara. "Ten reasons why a thermalized system cannot be described by a many-particle wave function." Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 58 (May 2017): 12–21. http://dx.doi.org/10.1016/j.shpsb.2017.04.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Salvino, R. E. "Erratum: Equilibrium statistical thermodynamics of a many-particle system coupled to an external scalar field." Physical Review A 42, no. 8 (October 1, 1990): 5040. http://dx.doi.org/10.1103/physreva.42.5040.2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Vakarchuk, I. O., and O. I. Hryhorchak. "Structure Functions of Many-Boson System with regard for Direct Three- and Four-Particle Correlations." Ukrainian Journal of Physics 60, no. 11 (November 2015): 1115–25. http://dx.doi.org/10.15407/ujpe60.11.1115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Skrypnyk, W. I. "Kirkwood–Salsburg equation for a quantum lattice system of oscillators with many-particle interaction potentials." Ukrainian Mathematical Journal 61, no. 5 (May 2009): 821–33. http://dx.doi.org/10.1007/s11253-009-0239-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Basko, D. M., I. L. Aleiner, and B. L. Altshuler. "Metal–insulator transition in a weakly interacting many-electron system with localized single-particle states." Annals of Physics 321, no. 5 (May 2006): 1126–205. http://dx.doi.org/10.1016/j.aop.2005.11.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

LUNGU, RADU PAUL, and ANDREI MANOLESCU. "TWO-DIMENSIONAL ELECTRON SYSTEM IN ELECTROMAGNETIC RADIATION FIELD." International Journal of Modern Physics B 15, no. 32 (December 30, 2001): 4245–59. http://dx.doi.org/10.1142/s0217979201008007.

Full text

Abstract:

We consider a two-dimensional electron gas in the presence of a monochromatic linear polarized electromagnetic field, within the Floquet formalism. The Floquet states have a simple relation with the energy eigenstates in the absence of the field. Therefore the single-particle and the two-particle Green functions of the many-body system with Coulomb interactions, in the radiation field, can be formally calculated by the standard diagrammatic techniques, as for the conservative system. We derive the elementary excitations of quasi-particle type, the plasma dispersion relation, and the ground state quasi-energy, and we relate them to the corresponding results for the conservative system.

APA, Harvard, Vancouver, ISO, and other styles

42

Behera, Rabi Narayan, and Sujata Dash. "A Particle Swarm Optimization based Hybrid Recommendation System." International Journal of Knowledge Discovery in Bioinformatics 6, no. 2 (July 2016): 1–10. http://dx.doi.org/10.4018/ijkdb.2016070101.

Full text

Abstract:

Due to rapid digital explosion user shows interest towards finding suggestions regarding a particular topic before taking any decision. Nowadays, a movie recommendation system is an upcoming area which suggests movies based on user profile. Many researchers working on supervised or semi-supervised ensemble based machine learning approach for matching more appropriate profiles and suggest related movies. In this paper a hybrid recommendation system is proposed which includes both collaborative and content based filtering to design a profile matching algorithm. A nature inspired Particle Swam Optimization technique is applied to fine tune the profile matching algorithm by assigning to multiple agents or particle with some initial random guess. The accuracy of the model will be judged comparing with Genetic algorithm.

APA, Harvard, Vancouver, ISO, and other styles

43

KAO, JUSTIN C. T., ALEXANDER A. GOLOVIN, and STEPHEN H. DAVIS. "Particle capture in binary solidification." Journal of Fluid Mechanics 625 (April 14, 2009): 299–320. http://dx.doi.org/10.1017/s0022112008005570.

Full text

Abstract:

We examine the interaction of a spherical foreign particle with a propagating solidification front in a binary alloy. Depending on the material properties and the speed of the front, the particle may be pushed ahead of the front, or engulfed and incorporated into the solid phase. We apply numerical boundary integral and continuation methods to determine the critical speed for particle capture, as a function of the system parameters. We reconcile the differing predictions of previous theoretical works, and show that many typical systems may obey a new scaling of the critical speed, as obtained here. We show that due to constitutional undercooling, the presence of solute decreases particle speeds by an order of magnitude below those for a single-component system. We briefly consider the case of spherical bubbles, where thermocapillary and solutocapillary effects play a large role.

APA, Harvard, Vancouver, ISO, and other styles

44

Godizov, A. G., and A. A. Godizov. "On the objective origin of the phase transitions and metastability in many-particle systems." International Journal of Modern Physics B 28, no. 24 (August 5, 2014): 1450163. http://dx.doi.org/10.1142/s021797921450163x.

Full text

Abstract:

The modern equilibrium statistical mechanics, intended to link microscopic dynamics to thermodynamic laws for macroscopic quantities, is faced with significant difficulties, as applied to the description of the macroscopic properties of real condensed media within wide thermodynamic ranges, including the vicinities of the phase transition points. A particular problem is the absence of metastable states in the Gibbs statistical mechanics of the systems composed of finite number of particles. Nevertheless, accordance between equilibrium statistical mechanics and thermodynamics of condensed media is achievable if we take account of the mutual correlation (the feedback) between the microscopic properties of molecules and the macrostate of the corresponding medium. This can be done via usage of the "enhanced" Hamilton operator of the considered many-particle system, which contains some temperature-dependent term(s), and the following introduction of the generalized equilibrium distribution over microstates. For illustration of the reasonableness of the proposed approach and of its practical availability in the applications to computing the macroscopic characteristics of condensed media, a cell model of melting/crystallization and metastable supercooled liquid for a water-like medium is presented.

APA, Harvard, Vancouver, ISO, and other styles

45

Tarkhov, Andrei E., and Boris V. Fine. "Estimating ergodization time of a chaotic many-particle system from a time reversal of equilibrium noise." New Journal of Physics 20, no. 12 (December 21, 2018): 123021. http://dx.doi.org/10.1088/1367-2630/aaf0b6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Los, Victor F. "Subdynamics of a many-particle classical system driven from an equilibrium state by an external force." Physica A: Statistical Mechanics and its Applications 554 (September 2020): 124704. http://dx.doi.org/10.1016/j.physa.2020.124704.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Indlekofer, K. M., and H. Lüth. "Many-particle density-matrix approach to a quantum dot system for the strong electron accumulation case." Physical Review B 62, no. 19 (November 15, 2000): 13016–21. http://dx.doi.org/10.1103/physrevb.62.13016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Ivankiv, Lev I., Yarema A. Prykarpatsky, Valeriy H. Samoilenko, and Anatolij K. Prykarpatski. "Quantum Current Algebra Symmetry and Description of Boltzmann Type Kinetic Equations in Statistical Physics." Symmetry 13, no. 8 (August 9, 2021): 1452. http://dx.doi.org/10.3390/sym13081452.

Full text

Abstract:

We review a non-relativistic current algebra symmetry approach to constructing the Bogolubov generating functional of many-particle distribution functions and apply it to description of invariantly reduced Hamiltonian systems of the Boltzmann type kinetic equations, related to naturally imposed constraints on many-particle correlation functions. As an interesting example of deriving Vlasov type kinetic equations, we considered a quantum-mechanical model of spinless particles with delta-type interaction, having applications for describing so called Benney-type hydrodynamical praticle flows. We also review new results on a special class of dynamical systems of Boltzmann–Bogolubov and Boltzmann–Vlasov type on infinite dimensional functional manifolds modeling kinetic processes in many-particle media. Based on algebraic properties of the canonical quantum symmetry current algebra and its functional representations, we succeeded in dual analysis of the infinite Bogolubov hierarchy of many-particle distribution functions and their Hamiltonian structure. Moreover, we proposed a new approach to invariant reduction of the Bogolubov hierarchy on a suitably chosen correlation function constraint and deduction of the related modified Boltzmann–Bogolubov kinetic equations on a finite set of multi-particle distribution functions. There are also presented results of application of devised methods to describing kinetic properties of a many-particle system with an adsorbent surface, in particular, the corresponding kinetic equation for the occupation density distribution function is derived.

APA, Harvard, Vancouver, ISO, and other styles

49

Haryani, Fairusy Fitria, Freddy Haryanto, and Sparisoma Viridi. "Difusi Bebas 1D dan 2D dengan Monte Carlo: Perbandingan Distribusi Bilangan Random Normal dan Seragam dengan Box-Müller." Jurnal Teori dan Aplikasi Fisika 9, no. 1 (January 31, 2021): 55–64. http://dx.doi.org/10.23960/jtaf.v9i1.2608.

Full text

Abstract:

Many biological processes in the human body are based on the diffusion system. Diffusion is defined as a process of random movement of the particle whose the direction is from high concentrations to low concentrations. Many of various study of diffusion have been done both experimentally and computationally. Because the particle interaction is stochastic, the Monte Carlo (MC) method is used in performing particle simulations. The main of MC method is the use of random numbers. Many software have provided uniform random number generators. But based on the analytic results, the solution is normal distribution. Therefore, Box-Müller can be used as a transformation of particle distribution. The software used, MATLAB, has a normal random generator. Therefore, the aims of this study is comparing particle distribution of these two different random number generator with MATLAB and showing the impact of timestep parameter to these random number generator. This result can be used as based for the modelling of more complex biological systems.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhang, Wen Wen, Xiu Jun Liu, Tong Qi Li, and Zhen Fan. "Size Distributions of Mesophase Microbeads Obtained from Heterogeneous and Homogeneous Systems." Key Engineering Materials 609-610 (April 2014): 571–76. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.571.

Full text

Abstract:

Mesophase microbeads were prepared by thermal condensation in the presence of heterogeneous and homogeneous systems. Morphologies and sizes of mesophase microbeads are characterized by scanning electronic microcopy (SEM), polarized light optical microphotography (PLOM) and laser particle size analyzer. SEM and PLOM results exhibit that mesophase microbeads have a narrow size distribution and many large particle in heterogeneous system. In homogeneous system, there are a great deal of smaller mesophase microbeads and a very little of larger mesophase microbeads. The laser particle size analysis results show that size distribution of mesophase microbeads in heterogeneous system is quite different from that in homogeneous system. There are multi-peaks on volume distribution curve in heterogeneous system. Larger mesophase microbeads are mainly in tens micron peak of size distribution curve. In homogeneous system, particle size of mesophase microbeads has a wide distribution and only single peak on size distribution curve. Moreover, sulfur concentration in reaction system makes the size of mesophase microbeads increase and the size distribution curve move to larger particle diameter. But sulfur concentration can not affect the curve pattern of size distribution.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!