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Örs Legeza

lead researcher
Wigner Research Centre for Physics

Örs Legeza, Doctor of the Hungarian Academy of Sciences, professor, head of the Strongly Correlated Systems “Lendület” Research Group at the Wigner Research Centre for Physics, currently a visiting professor at the Philipps Universität Marburg, and a Hans Fischer Senior Fellow at the Institute for Advanced Study, Technische Universität München. His main research interests focus on the development of novel tensor network state methods via concepts of quantum information theory, and their application to strongly correlated quantum many-body systems to simulate and study magnetic properties in solid states, exotic quantum phases, complex molecular clusters, ultracold atomic systems, and nuclear structures. He has spent more than ten years abroad (Institut Laue-Langevin in Grenoble, Friedrich Alexander Universität Erlangen, Eidgenössische Technische Hochschule Zürich, Freie Universität Berlin, Technische Universität Berlin, Ludwig Maximilian Universität München) , and has received the Humboldt Award in 2018, the Academy Award of the Hungarian Academy of Sciences in 2021, and the Hans Fischer Senior Award and Fellowship in 2021.

Selected publications

  • I Shapir, A Hamo, S Pecker, C P Moca, Ö Legeza, G Zarand, S Ilani, Imaging the Wigner Crystal of Electrons in One Dimension, Science 364 (6443) 870-875 (2019)
  • F M Faulstich, A Laestadius, Ö Legeza, R Schneider, S Kvaal, Analysis of The Coupled-Cluster Method Tailored by Tensor-Network States in Quantum Chemistry, SIAM J. Numer. Anal. 57 2579 (2019)
  • C Krumnow, L Veis, Ö Legeza, J Eisert, Fermionic orbital optimisation in tensor network states, Phys. Rev. Lett. 117 210402 (2016)
  • Sz Szalay, M Pfeffer, V Murg, G Barcza, F Verstraete, R Schneider, Ö Legeza, Tensor product methods and entanglement optimization for ab initio quantum chemistry, International Jorurnal of Quantum Chemistry 115 (19) 1342-1391 (2015)

Projects

Numerical simulations using tensor factorization of compound systems and quantum chemical applications
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Publications

2021-06-18
npj Quantum Information 7:99

Highly tunable magneto-optical response from magnesium-vacancy color centers in diamond

Anton Pershin
Barcza Gergely
Örs Legeza
Ádám Gali
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2021-02-23
J Chem Phys 154:84111

Orbital entanglement and correlation from pCCD-tailored Coupled Cluster wave functions

A Nowak
Örs Legeza
K Boguslawski
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2021-02-16
Commun. Phys. 4:29

How creating one additional well can generate Bose-Einstein condensation

Máté Mihály
Örs Legeza
Rolf Schilling
Mason Yousif
Christian Schilling
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Research fields

  • Realization of a quantum communication network
  • Elementary building blocks of quantum information
  • Quantum computation and simulating quantum systems

Contact us (Wigner RCP)

1121 Budapest,
Konkoly-Thege Miklós út 29-33.
Secretary:
+36-1-392- 2512
Media contact:
+36-30-487-9869
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