Misha receives tenure
After almost 5 years as a tenure-track professor at IST Austria, Misha Lemeshko has been promoted to Professor with tenure.
New paper in Phys. Rev. X
In collaboration with the experimental groups of Ronen Rapaport (Hebrew University Jerusalem) and of Paulo Santos (Paul Drude Institute, Berlin) we have demonstrated anisotropic dipole-dipole interactions between excitonic fluids created in semiconductor bilayers.
This paves the way to use indirect dipolar excitons as a new platform for quantum simulation of many-particle phenomena.
C. Hubert, Y. Baruchi, Y. Mazuz-Harpaz, K. Cohen, K. Biermann, M. Lemeshko, K. West, L. Pfeiffer, R. Rapaport, P. Santos
Attractive dipolar coupling between stacked exciton fluids
Phys. Rev. X 9, 021026 (2019), arXiv:1807.11238
“…bis auf seinen Akzent”
Recent dossier of the Austrian Presse Agentur “Zum Forschen Berufen” (in German) focuses on the life of scientists in modern academia.
The dossier features opinions of 13 Austrian scientists in the form of interviews and commentaries.
One of them was Misha Lemeshko with a guest commentary “…bis auf seinen Akzent” (in German)
Phys. Rev. B editor’s suggestion
Recent paper (in collaboration with Johan Mentink and Misha Katsnelson from RU Nijmegen, NL) describes how the angulon theory can be applied to treat angular momentum transfer between electrons and phonons in solids:
J. H. Mentink, M. I. Katsnelson, M. Lemeshko
Quantum many-body dynamics of the Einstein-de Haas effect,
Phys. Rev. B 99, 064428 (2019), arXiv:1802.01638
Editor’s suggestion
Paper in Molecular Physics
It was an honor for our group to contribute to the special issue of Molecular Physics dedicated to Nimrod Moiseyev‘s 70th birthday
X. Li, G. Bighin, E. Yakaboylu, M. Lemeshko
Variational approaches to quantum impurities: from the Fröhlich polaron to the angulon
Molecular Physics (2019), arXiv:1810.10302
Happy birthday, Nimrod!
Lise Meitner fellowship for Giacomo Bighin
Giacomo Bighin has been awarded the prestigious Lise Meitner Fellowship from the Austrian Science Fund (FWF). Giacomo’s project “A path integral approach to composite impurities” (based on preliminary results he obtained working in the Lemeshko group), has been supported with funding for a two year postdoc salary plus additional expenses (~170,000 Euro in total).
Congratulations, Giacomo!
Paper in Phys. Rev. Lett.
In collaboration with Mikhail Shkolnikov (algebraic geometry and topology group of Prof. Hausel), postdoc Enderalp Yakaboylu has shown that quantum particles interacting with a many-particle environment can be described using so-called “quantum groups” (or “q-deformed Lie algebras”). This provides an interesting new connection between condensed-matter physics and mathematics.
E. Yakaboylu, M. Shkolnikov, M. Lemeshko
Quantum groups as hidden symmetries of quantum impurities
Phys. Rev. Lett. 121, 255302 (2018), arXiv:1809.00222
Paper in Phys. Rev. B
Postdocs Enderalp Yakaboylu and Bikashkali Midya (currently at U Penn) developed a theory of the “rotating polaron” (or the “moving angulon”) – an impurity possessing both translational and rotational degrees of freedom. The work was done in collaboration with the mathematical physicists Andreas Deuchert and Nikolai Leopold (group of Prof. Seiringer)
E. Yakaboylu, B. Midya, A. Deuchert, N. Leopold, M. Lemeshko
Theory of the Rotating Polaron: Spectrum and Self-Localization
Phys. Rev. B 98, 224506 (2018), arXiv:1809.01204
The plot of the rotating polaron spectral function has been picked for the Phys. Rev. B Kaleidoscope collection
Paper in Phys. Rev. Lett.
Postdoc Giacomo Bighin developed a diagrammatic Monte Carlo approach to quantum systems consisting of particles with angular momentum:
G. Bighin, T. V. Tscherbul, M. Lemeshko
Diagrammatic Monte Carlo approach to angular momentum in quantum many-particle systems,
Phys. Rev. Lett. 121, 165301 (2018); arXiv:1803.07990
Press Coverage: Phys.org, EurekAlert, ScienceDaily, (in English), Chemie.de, InnovationsReport (in German)
ERC Starting Grant for Mikhail Lemeshko
With the new ERC funding available, the Lemeshko group has several new openings for Postdoc and Ph.D. positions. Please send your application documents directly to Prof. Lemeshko.
In this round of awards, one Starting Grant of the European Research Council goes to Professor Mikhail Lemeshko, a theoretical physicist who has been working at IST Austria since 2014. In his project, which the ERC will support with about 1.5 million Euro, he will establish a general theory of a quasiparticle, the angulon, that he discovered during his time at IST Austria. The angulon quasiparticle is expected to help tackle previously unsolvable problems in various fields, ranging from physical chemistry to the technology of data storage.
More details at the IST website (German version)