Lemeshko Group

Theoretical Atomic, Molecular, and Optical Physics

“The whole is greater than the sum of its parts.” Aristotle’s saying also holds true in many systems studied in quantum physics. Mikhail Lemeshko investigates how macroscopic quantum phenomena emerge in ensembles of atoms and molecules.

Most polyatomic systems in physics, chemistry, and biology are strongly correlated: their complex behavior cannot be deduced from the properties of their individual components. Despite considerable effort, understanding strongly correlated, many-body systems still present a formidable challenge. For instance, given a single atom of a certain kind, it is hard to predict whether the resulting bulk material will be solid, gaseous, or liquid, crystalline or amorphous, magnetic or non-magnetic, conductive or insulating. The Lemeshko group studies how many-particle quantum phenomena emerge in ensembles of atoms and molecules, and in so doing, answers questions such as: How many particles are sufficient for a given property to emerge? How does an external environment modify the properties of quantum systems? Their theoretical efforts aim to explain experiments on cold molecules and ultra-cold quantum gases, as well as predict novel, previously unobserved phenomena.

Group Leader


On this site:


Team

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Giacomo Bighin

Postdoc

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Igor Cherepanov

PhD Student

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Areg Ghazaryan

Postdoc


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Volker Karle

PhD Student

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Xiang Li

PhD Student

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Mikhail Maslov

PhD Student


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Wojciech Rzadkowski

PhD Student

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Fumika Suzuki

Postdoc

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Lorant Szegedy

Postdoc


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Artem Volosniev

Postdoc

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Enderalp Yakaboylu

Postdoc


Current Projects

Understanding angular momentum properties of quantum many-particle systems | Studying open quantum systems and understanding how dissipation acts at the microscopic scale | Many-body physics of ultra-cold quantum gases | Developing techniques to manipulate atoms, molecules, and interactions between them with electromagnetic fields


Publications

Ghazaryan A, Lemeshko M, Volosniev A. 2020. Filtering spins by scattering from a lattice of point magnets. Communications Physics. 3. View

Rzadkowski W, Defenu N, Chiacchiera S, Trombettoni A, Bighin G. 2020. Detecting composite orders in layered models via machine learning. New Journal of Physics. 22(9). View

Hubert C, Cohen K, Ghazaryan A, Lemeshko M, Rapaport R, Santos PV. 2020. Attractive interactions, molecular complexes, and polarons in coupled dipolar exciton fluids. Physical Review B. 102(4). View

Chatterley AS, Christiansen L, Schouder CA, Jørgensen AV, Shepperson B, Cherepanov I, Bighin G, Zillich RE, Lemeshko M, Stapelfeldt H. 2020. Rotational coherence spectroscopy of molecules in Helium nanodroplets: Reconciling the time and the frequency domains. Physical Review Letters. 125(1). View

Pȩkalski J, Rzadkowski W, Panagiotopoulos AZ. 2020. Shear-induced ordering in systems with competing interactions: A machine learning study. The Journal of chemical physics. 152(20), 204905. View

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Career

since 2019 Professor, IST Austria
2014 – 2019 Assistant Professor, IST Austria
2011 – 2014 ITAMP Postdoctoral Fellow, Harvard University, Cambridge, USA
2011 PhD, Fritz Haber Institute of the Max Planck Society, Berlin, Germany


Selected Distinctions

2018 ERC Starting Grant
2017 Ludwig Boltzmann Prize, Austrian Physical Society
2012 One of four finalists, worldwide Thesis Prize competition, AMO division of the American Physical Society
2011 ITAMP Postdoctoral Fellowship


Additional Information

Open Lemeshko group website



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