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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.

On this site:


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


Mistakidis SI, Volosniev A, Barfknecht RE, Fogarty T, Busch T, Foerster A, Schmelcher P, Zinner NT. 2023. Few-body Bose gases in low dimensions – A laboratory for quantum dynamics. Physics Reports. 1042, 1–108. View

Koutentakis G, Ghazaryan A, Lemeshko M. 2023. Rotor lattice model of ferroelectric large polarons. Physical Review Research. 5(4), 043016. View

Henderson PM, Ghazaryan A, Zibrov AA, Young AF, Serbyn M. 2023. Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene. Physical Review B. 108(12), 125411. View

Al Hyder R, Cappellaro A, Lemeshko M, Volosniev A. 2023. Achiral dipoles on a ferromagnet can affect its magnetization direction. The Journal of Chemical Physics. 159(10), 104103. View

Brauneis F, Ghazaryan A, Hammer H-W, Volosniev A. 2023. Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux. Communications Physics. 6, 224. View

View All Publications

ReX-Link: Mikhail Lemeshko


since 2019 Professor, Institute of Science and Technology Austria (ISTA)
2014 – 2019 Assistant Professor, Institute of Science and Technology Austria (ISTA)
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

Physics & Beyond at ISTA

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