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Antisymmetrized molecular dynamics with quantum branching is generalized so as to allow finite time duration of the unrestricted coherent mean field propagation which is followed by the decoherence into wave packets. In this new model, the…

核理论 · 物理学 2011-08-04 Akira Ono , S. Hudan , A. Chbihi , J. D. Frankland

Basic problems of the semiclassical microscopic modelling of strongly interactingsystems are discussed within the framework of Quantum Molecular Dynamics (QMD). This model allows to study the influence of several types of nucleonic…

核理论 · 物理学 2014-11-18 C. Hartnack , Rajeev K. Puri , J. Aichelin , J. Konopka , S. A. Bass , H. Stoecker , W. Greiner

The most important characteristics of the fragmentation of heterogeneous solids is that the mass (size) distribution of pieces is described by a power law functional form. The exponent of the distribution displays a high degree of…

无序系统与神经网络 · 物理学 2015-03-10 Gergo Pal , Imre Varga , Ferenc Kun

Adding plasticizers is a well-known procedure to reduce the glass transition temperature in polymers. It has been recently shown that this effect shows a non-monotonic dependence on the size of additive molecules [The Journal of Chemical…

软凝聚态物质 · 物理学 2020-06-24 Elias M. Zirdehi , Thomas Voigtmann , Fathollah Varnik

In the present work, we make confrontation of our theoretical calculations using quantum molecular dynamics model with the experimental data for the reactions of $^{40}Ar$ +$^{45}$Sc, $^{197}Au$ +$^{197}$Au and $^{129}Xe$ +$^{119}$Sn at…

核理论 · 物理学 2011-11-01 Tajinder Pal Singh , Sakshi Gautam

The energy dependence of multiplicity fluctuations was studied for the most central Pb+Pb collisions at 20A, 30A, 40A, 80A and 158A GeV by the NA49 experiment at the CERN SPS. The multiplicity distribution for negatively and positively…

核实验 · 物理学 2008-11-26 Benjamin Lungwitz

We study the fragment size distributions after crushing of single and many particles under uniaxial compression inside a cylindrical container by means of numerical simulations. Under the assumption that breaking goes through the bulk of…

软凝聚态物质 · 物理学 2019-01-16 Pavel S. Iliev , Falk K. Wittel , Hans J. Herrmann

Using the QMD model, we study the mass dependence of the disappearance of transverse flow in heavier colliding nuclei. A power law mass dependence is obtained in all cases. Our results are in excellent agreement with data. For the first…

核理论 · 物理学 2010-04-29 Rajeev K. Puri , Amandeep Sood , J. Aichelin

We have studied the centrality bin size dependence of charged particle forward-backward multiplicity correlation strength in 5%, 0-5%, and 0-10% most central Au+Au collisions at $\sqrt{s_NN}}$=200 GeV with a parton and hadron cascade model,…

核理论 · 物理学 2009-09-10 Yu-Liang Yan , Dai-Mei Zhou , Bao-Guo Dong , Xiao-Mei Li , Hai-Liang Ma , Ben-Hao Sa

The fragmentation of molecular cations following inner-shell decay processes in molecules containing heavy elements underpins the x-ray damage effects observed in x-ray scattering measurements of biological and chemical materials, as well…

化学物理 · 物理学 2024-06-17 Adam E. A. Fouda , Stephen H. Southworth , Phay J. Ho

Utilizing the three-fireball picture within the quark combination model, we study systematically the charged particle pseudorapidity distributions in both Au+Au and Cu+Cu collision systems as a function of collision centrality and energy,…

高能物理 - 唯象学 · 物理学 2010-01-08 De-ming Wei , Feng-lan Shao , Jun Song , Yun-fei Wang

In this paper, we show that multiplicity spectra of direct photons in A+A and d+Au collisions at different centrality classes and different energies exhibit geometrical scaling, {\em i.e.}, they depend on a specific combination of number of…

核理论 · 物理学 2023-04-26 Vladimir Khachatryan , Michal Praszalowicz

Measurement choices in weakly-measured open quantum systems can affect quantum trajectory chaos. We consider this scenario semi-classically and show that measurement acts as nonlinear generalized fluctuation and dissipation forces. These…

量子物理 · 物理学 2018-08-30 S. Greenfield , Y. Shi , J. K. Eastman , A. R. R. Carvalho , A. K. Pattanayak

A cluster theory based mathematical model was developed and used to simulate the dynamics of a system composed of a large number of interacting agents-clusters with different size. The case of a system formed by a constant total number of…

物理与社会 · 物理学 2007-05-23 Vitalie Eremeev , Ion Rasca , Florentin Paladi

We present results on the centrality and system size dependence of (multi-strange)hyperons in Pb+Pb collisions at 40$A$ and 158$A$ GeV from the Ultra-relativistic Quantum Molecular Dynamics (UrQMD-v2.3) model and a coupled…

高能物理 - 唯象学 · 物理学 2013-05-29 Hannah Petersen , Michael Mitrovski , Tim Schuster , Marcus Bleicher

In the present study, we have simulated the central reactions of nearly symmetric and asymmetric systems over the entire periodic table for different values of energies using QMD model as event generator. These reactions are simulated for…

核理论 · 物理学 2011-02-22 Sukhjit Kaur , Supriya Goyal , Rajeev K. Puri

We investigate the effect of different types of non-unitary quantum channels on multi-qubit quantum systems. For an $n$-qubit system and a particular channel, in order to draw unbiased conclusions about the system as a whole as opposed to…

量子物理 · 物理学 2020-05-07 Geetu Narang , Shruti Dogra , Arvind

Using classical molecular dynamics simulations we examine the formation of craters during 0.4 - 100 keV Xe bombardment of Au. Our simulation results, and comparison with experiments and simulations of other groups, are used to examine to…

材料科学 · 物理学 2007-05-23 E. M. Bringa , K. Nordlund , J. Keinonen

Understanding the dynamics of equilibration processes in quantum systems as well as their interplay with dissipation and fluctuation is a major challenge in quantum many-body theory. The timescales of such processes are investigated in…

核理论 · 物理学 2020-06-24 C. Simenel , K. Godbey , A. S. Umar

In this review, we study some aspects of the non-equilibrium dynamics of quantum systems. In particular, we consider the effect of varying a parameter in the Hamiltonian of a quantum system which takes it across a quantum critical point or…

统计力学 · 物理学 2015-05-14 Shreyoshi Mondal , Diptiman Sen , K. Sengupta