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Projects / Programmes source: ARIS

Diagnosing nonequilibrium quantum matter

Research activity

Code Science Field Subfield
1.02.01  Natural sciences and mathematics  Physics  Physics of condesed matter 

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
Nonequilibrium phenomena in quantum systems, isolated quantum many-body systems
Evaluation (rules)
source: COBISS
Researchers (6)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  55723  PhD Miroslav Hopjan  Physics  Researcher  2021 - 2022  17 
2.  26458  PhD Jure Kokalj  Physics  Researcher  2019 - 2022  103 
3.  25625  PhD Jernej Mravlje  Physics  Researcher  2019 - 2022  131 
4.  01105  PhD Peter Prelovšek  Physics  Researcher  2019 - 2022  424 
5.  29545  PhD Lev Vidmar  Physics  Head  2019 - 2022  136 
6.  23567  PhD Rok Žitko  Physics  Researcher  2019 - 2022  253 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,017 
Abstract
The research project is going to focus on feasible goals in the very active field of many-body quantum systems far from equilibrium, the dynamics of quantum information, and the phenomenology of quantum chaos. It is going to significantly advance our understanding of thermalization and quantum chaos in nonequilibrium many-body systems by focusing on three different topics: The first objective is to quantify differences between Hamiltonian eigenstates and random pure states. The second objective is to establish a systematic understanding of the characteristic energy and time scale on which realistic quantum systems share similarities with random matrices. As a third objective, we are going to explore the minimal conditions for the validity of the eigenstate thermalization hypothesis in realistic condensed matter systems. We are going to use high-performance computing facilities to answer some of the open questions in this very timely and fast growing area of research.
Significance for science
The research project belongs to the scientific field that addresses fundamental open questions in quantum mechanics of systems with many constituents. Curiosity and the quest for new theoretical concepts are driven by state-of-the art experiments in the field of condensed matter, ultracold atoms on optical lattices, coupled superconducting qubits, etc. The long term research goal of the community is to exploit quantum mechanics and to give rise to new quantum devices, including analogue and digital computers, which are going revolutionize the 21st century. Results of our project are going to establish links between two theoretical concepts, that a few years ago appeared to be entirely disconnected: the concept of eigenstate thermalization, which is related to statistical physics and does not contain any statement about the relevant time scales, and the time evolution of closed quantum systems, in which a sharp measure of thermalization was difficult to define. We are now offering a new perspective on the characteristic energy and time scales of the problem, thereby opening doors towards a deeper understanding of nonequilibrium quantum matter and its ability to be manipulated in time domain, which is aligned with the long terms goals of the research community described above.
Significance for the country
The research project belongs to the scientific field that addresses fundamental open questions in quantum mechanics of systems with many constituents. Curiosity and the quest for new theoretical concepts are driven by state-of-the art experiments in the field of condensed matter, ultracold atoms on optical lattices, coupled superconducting qubits, etc. The long term research goal of the community is to exploit quantum mechanics and to give rise to new quantum devices, including analogue and digital computers, which are going revolutionize the 21st century. Results of our project are going to establish links between two theoretical concepts, that a few years ago appeared to be entirely disconnected: the concept of eigenstate thermalization, which is related to statistical physics and does not contain any statement about the relevant time scales, and the time evolution of closed quantum systems, in which a sharp measure of thermalization was difficult to define. We are now offering a new perspective on the characteristic energy and time scales of the problem, thereby opening doors towards a deeper understanding of nonequilibrium quantum matter and its ability to be manipulated in time domain, which is aligned with the long terms goals of the research community described above.
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