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Projects / Programmes source: ARIS

Non-equilibrium dynamics of interacting electron systems

Research activity

Code Science Field Subfield
1.02.02  Natural sciences and mathematics  Physics  Theoretical physics 

Code Science Field
P260  Natural sciences and mathematics  Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy 

Code Science Field
1.03  Natural Sciences  Physical sciences 
Keywords
Solid state theory, correlated electrons, novel materials, numerical methods, transport properties, nonequilibrium properties
Evaluation (rules)
source: COBISS
Researchers (12)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  04943  PhD Janez Bonča  Physics  Researcher  2011 - 2014  286 
2.  34984  PhD Berislav Buča  Physics  Junior researcher  2012 - 2014  14 
3.  30868  PhD Tilen Čadež  Physics  Researcher  2013 - 2014 
4.  22507  PhD Martin Horvat  Physics  Researcher  2011  76 
5.  26458  PhD Jure Kokalj  Physics  Researcher  2011 - 2013  104 
6.  26459  PhD Nejc Košnik  Physics  Researcher  2011 - 2013  79 
7.  25625  PhD Jernej Mravlje  Physics  Researcher  2011 - 2014  132 
8.  25656  PhD Miha Nemevšek  Physics  Researcher  2011 - 2013  158 
9.  01105  PhD Peter Prelovšek  Physics  Head  2011 - 2014  424 
10.  04544  PhD Anton Ramšak  Computer science and informatics  Researcher  2011 - 2014  199 
11.  19162  PhD Tomaž Rejec  Physics  Researcher  2012 - 2014  69 
12.  34248  PhD Robin Steinigeweg  Physics  Researcher  2011 - 2012 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,035 
2.  1554  University of Ljubljana, Faculty of Mathematics and Physics  Ljubljana  1627007  34,301 
Abstract
The project is devoted to the theory of nonequilibrium and real - time dynamics of strongly correlated  electrons in solid materials. Since the subject came into focus of intensive research only recently, there is number of fundamental theoretical issues which have to be addressed, in connection with the search for novel numerical and analytical approaches to these problems. Several questions will be investigated within the project. The nonlinear and even linear response to external field and driving of Mott- Hubbard insulator  state  are so far controversial and will be investigated, starting both from finite-temperature equilibrium and from the ground state, respectively. Relevant models  in this respect are models of interacting spinless fermions and the Hubbard model, in one dimensional geometry and higher dimensions. Another class of open problems concerns the driving and nonlinear mobility  as well as  real-time response and dynamics of single charge carriers coupled strongly with the background, either magnetic one in Mott insulators and antiferromagnets, or to lattice vibrations in electron-phonon systems. Relevant to experiments on spin-chain materials and their application to magnetic-mode cooling are nonlinear properties of nearly dissipationless thermal conductivity via magnetic excitations.  Related to all issues in nonequilibrium dynamics is the open problem of  the approach to equilibrium or thermalization where the role of conserved quantities, driving field and dimension will be considered.
Significance for science
The research of nonequilibrium and transient phenomena in solid state materials as well of analogous systems, where a particular attention in recent years are ultracold atoms in optical lattices, in in the last decade within the focus of experimental and theoretical efforts in condensed matter physics. This is partially the consequence of rapid advance in experimental methods, as the ultrafast optical laser spectroscopy, time-resolved angular photoemission, sophisticated treatments of cold atoms systems etc. Besides that materials with strongly correlated electrons are of particular interest because the time dependent and transient phenomena in these systems are extremely fast and due to these properties of potential interest for future applications. Our results within the finished project are well in the direction of international efforts and achievements, and had already a very visible echo in the the scientific community. Results on the dielectric breakdown in Mott isulators, ultrafast charge recombination in excited Mott isulators, on anomalous linear response and relaxation in integrable systems of correlated electrons have been published in most respected international scientific journals and have been presented on several conferences as invited talks.
Significance for the country
Successful research and project in this active field of solid state physics and material science opened great opportunities for the exchange of scientists, in particular younger ones, into EU and world-wide collaborations with prestigious scientific institutions and individuals. The subject of the project is closely related to a Ph.D. dissertaion which will be defended in few months and the candidate hase been already offered several prestiguous postdoc positions on the basis of her results and papers published so far. The presented theoretical project has already led to increased collaboration with domestic Slovenian experimental group working on ultrafast spectroscopy in solid materials. Achievements of the project also present a greater potential for application of EU projects and their approval. Novel results with high impact in this research area also result in higher visibility of physics and science in Slovenia, becoming more attractive place for foreign students and researchers.
Most important scientific results Annual report 2011, 2012, 2013, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2011, 2012, 2013, final report, complete report on dLib.si
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