BrainMap

Victor Eugen Ambrus

- UNIVERSITATEA DE VEST TIMISOARA

Other affiliations

Researcher - JOHANN WOLFGANG GOETHE-UNIVERSITAET FRANKFURT AM MAIN (Germany)

Researcher | Teaching staff

Web of Science ResearcherID: not public

Expertise & keywords

Kinetic models for the quark-gluon plasma Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente - TE-2021
PN-III-P1-1.1-TE-2021-1707 2022 - 2024

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation:

Project website: http://quasar.physics.uvt.ro/~victor/KQGP

Abstract:

Abstract

The present project aims to extend our understanding of the phenomenology of the quark-gluon plasma (QGP) formed in relativistic heavy ion collisions by addressing the following open questions: validity of attractor solutions in non-symmetric flows (O1); impact of charge diffusion at finite chemical potential on flow observables (O2); polarisation in vortical fluids (O3).

O1 addresses the existence and robustness of attractor solutions, identified already in the context of the Bjorken model. In particular, we seek for attractors due solely to the transverse expansion (in the absence of longitudinal expansion). We then seek to quantify the effect of both longitudinal and transverse expansions in the harmonic flow coefficients vn for 2+1-D Bjorken flow with realistic initial transverse plane distributions.

During O2, we consider simple kinetic models with multiple particle species in order to model the diffusion of the various conserved charges characterising the QGP (Q, B and S). In order to investigate the properties of the chiral phase transition at finite chemical potential, we use a kinetic model for particles with dynamical mass and implement the non-ideal equation of state derived within the linear sigma model with quarks (LSMq).

During O3, we address the problem of polarisation in vortical fluids from the perspective of the novel helical vortical effects (HVE). In particular, we aim to formulate a thermodynamically consistent hydrodynamic theory taking int

Extensive use of experience in space and security activities Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0371 2018 - 2021

Role in this project:

Coordinating institution: INSTITUTUL DE STIINTE SPATIALE-FILIALA INFLPR

Project partners: INSTITUTUL DE STIINTE SPATIALE-FILIALA INFLPR (RO); UNIVERSITATEA DE VEST TIMISOARA (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU OPTOELECTRONICA INOE 2000 INCD (RO); INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU FIZICA PAMANTULUI - INCDFP RA (RO); UNIVERSITATEA TEHNICA DIN CLUJ - NAPOCA (RO); CENTRUL INTERNAŢIONAL PENTRU PREGĂTIRE AVANSATĂ ŞI CERCETARE ÎN FIZICĂ-FILIALĂ A INCDFM BUCUREŞTI (RO); UNIVERSITATEA BUCURESTI (RO); INSTITUTUL ASTRONOMIC (RO); UNIVERSITATEA "DUNAREA DE JOS" (RO); INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA " HORIA HULUBEI " - IFIN - HH (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://www.spacescience.ro/projects/vess

Abstract:

The goal of the project is to improve the institutional performance of the partners, including those with the potential for relaunching, by developing space and security competencies and by encouraging the orientation of research activities in pragmatic directions. Space activity involves the development of technologies and technologies validated in extreme conditions, which have significant applicative potential in various priority economic and social domains.

The VESS project is based on the experience gained by the Coordinator through participation in ESA scientific missions, the development and validation of flight software and hardware components, the development of countermeasures in the context of human crew space missions. Partners contribute with their own skills in areas such as math physics, computer science, advanced technologies, astronomy. VESS will provide knowledge sharing and exploitation within and outside the consortium by creating technology transfer and knowledge transfer offers to other areas of activity. Furthermore, VESS will allow joint use of existing research infrastructures for partners. The four component projects are oriented, each by its specificity, both to the consolidation of the Romanian presence in the activities of ESA, as well as to the capitalization in the economic and social environment of the obtained results. Ensuring synergic interaction between component projects at the level of the complex project will maximize the chances of success and superior valorisation of the results. The joint RDI program to be developed will lay the foundations for a field of competence in space and derivative applications. The offer of services to the socio-economic environment will be achieved by organizing workshops that will be provided with adequate advertising. The patenting of the results will be done by the partners directly involved in the activities that produced these results.

Quantum corrections in mesoscopic systems Call name: P 1 - SP 1.1 - Proiecte de cercetare Postdoctorală
PN-III-P1-1.1-PD-2016-1423 2018 - 2020

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://quasar.physics.uvt.ro/~victor/QCORR/

Abstract:

The study of quantum corrections in mesoscopic systems will be performed by comparing kinetic theory and quantum field theory (QFT) results for rigidly-rotating thermal states.

On the Minkowski space, kinetic theory predicts that rigidly-rotating thermal states exhibit a speed of light surface (SOL), where co-rotating observers travel at the speed of light and the stress-energy tensor (SET) diverges. When this system is investigated using QFT, a fundamental difference is found, namely that the rigidly-rotating thermal states of the Klein-Gordon field are ill-defined everywhere due to co-rotating modes having non-vanishing energy and infinite statistical weight. On the other hand, the SET for the Dirac field is well-defined up to the SOL, where the quantum corrections become dominant.

In order to render the SET finite, the rotating system must be enclosed inside a boundary which excludes the SOL. Recent QFT results confirm that the SET is regular for both the Klein-Gordon and the Fermi-Dirac fields, but so far a kinetic theory analysis of such systems has not been performed. We propose as an objective of this project to perform a comparative study between the QFT and the kinetic theory approaches by employing numerical methods to evaluate mode sums (QFT) and the lattice Boltzmann method for solving the relativistic Boltzmann equation.

Furthermore, it is natural to consider the problem of rigidly-rotating thermal states in bounded spaces, such as the anti-de Sitter (adS) space and the Einstein Static Universe (ASU). We propose to highlight the properties of quantum corrections in such systems by comparing the results obtained by solving the relativistic Boltzmann equation, as well as the Klein-Gordon and Dirac equations on these space-times.

Mobilitate cercetător Victor Eugen Ambrus Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori, 2019
PN-III-P1-1.1-MC-2019-0234 2019 - 2019

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website:

Abstract:

Lattice Boltzmann models for the simulation of flows of rarefied gases in the relativistic regime Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-2910 2015 - 2017

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website: http://www.physics.uvt.ro/~victor/RUTE2910/index.html

Abstract:

The construction of lattice Boltzmann models for the simulation of relativistic gas flows is a relatively new research field. We propose to contribute to this field by reformulating the formalism of the Boltzmann equation and the method for the discretisation of the momentum space using the tetrad formalism, through which the mass-shell condition is decoupled from the space-time geometry. Furthermore, we propose the development of lattice Boltzmann models of arbitrary order using modern quadrature methods, valid for particles of arbitrary masses. Finally, we propose the application of the methodology described above to the study of gas flows in general relativity (flows on a gravitational wave background, scattering of gas on black hole space-times, thermal states on rotating space-times, etc).

Kinetic models for micro-scale transport phenomena and structure formation in complex fluids: implementation on GPU-based parallel computing systems Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0516 2011 - 2016

Role in this project:

Coordinating institution: Academia Romana - Filiala Timisoara

Project partners: Academia Romana - Filiala Timisoara (RO)

Affiliation:

Project website: http://www.physics.uvt.ro/~sofonea/PCE0516/ http://acad-tim.tm.edu.ro/sofonea/PCE0516

Abstract:

The project is dedicated to the development and application of three-dimensional (3D) Lattice Boltzmann (LB) models for the study of complex fluids and their micro-scale behaviour. LB models allow the easy incorporation of interparticle forces as well as of boundary conditions and are appropriate for implementation on massively-parallel computers. Intensive simulations will be done on the IBM Blue Gene P system recently inaugurated at

the West University of Timisoara, as well as on a "desktop supercomputer" incorporating two Graphics Processing Units (GPU), to be set up at the host Institution. Simulations will be conducted in order to understand the effect of various conditions (fluid viscosity, temperature gradients and/or anisotropy induced by gravity or shear flow) on the phase separation process and the scaling exponents that characterize the domain growth in single- or multicomponent fluid systems. The morphology of the 3D structures formed during the phase separation, as well as their dynamics, will be investigated using the Minkowski functionals. Specific problems in microfluidics will be also investigated through 3D Lattice Boltzmann simulations: rarefaction effects in long microchannels, temperature dip in force-driven flow and thermal creep. The formation of drops or bubbles introduced in the co-flowing phase via a capillary tube or a T-junction will be another process to be analyzed through LB simulations in three dimensions.

Quark Matter 2018 (XXVIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions) Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2018-0312 2018 -

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website:

Abstract:

MicroFluidics and Non-Equilibrium Gas Flows Conference 2018 Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2017-2373 2017 -

Role in this project:

Coordinating institution: UNIVERSITATEA DE VEST TIMISOARA

Project partners: UNIVERSITATEA DE VEST TIMISOARA (RO)

Affiliation: UNIVERSITATEA DE VEST TIMISOARA (RO)

Project website:

Abstract:

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator
List of research grants as partner team leader
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects