Research INterest

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My main research interests are nanoscale systems far from equilibrium, in particular, nonlinear systems. Naturally this includes an interest in open (quantum) systems, probability theory and stochastic thermodynamics. 

In the past I have been investigating nonequilibrium pattern formation like laning and demixing in driven Brownian particles by means of large scale simulations and dynamical density functional theory. When a system is driven out of equilibrium, the formalism of stochastic thermodynamics provides powerful relations like the Jarzynski equality. Generalizing these so called fluctuation theorems to incorporate the measurement device and measurement errors, especially when performing feedback control, has been part of my reserach. 

Furthermore, I explored the interplay of electron transport and mechanical degrees of freedom. In particular, the thermodynamic description of self-oscillation in nano electromechanical systems and their application as stochastic engines and rectifiers. More recently, I have been investigating collective phenomena of self-oscillatory systems, especially,  in combination with topological band structures. 

Besides, quantum many-body physics has attracted my attention, especially quantum critical systems and the fate of quantum phase transitions in open system settings as experiments can never be completely isolated. Here, the laws of thermodynamics dictate the way to correctly account for the influence of the environment and leads to a consistent and rigorous framework. Other striking phenomenon of collective behavior in many-body systems is superradiance and delocalization, which has attracted my attention lately. 

Invited Talks

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Self-oscillation, heat engines, synchronization and topology -- the electron shuttle revisited
FQST2020 - International Workshop for Young Researchers on the Future of Quantum Science and Technology
National Institute of Informatics, Feb. 03 - 06, 2020, Tokyo, Japan

Other Talks

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Contributed  talks in international meetings

Nanoelectromechanical rotary (engine &) current rectifier
APS March Meeting 2022 -- Chicago (2022)

Topological Synchronization of coupled van der Pol oscillators
EAS - Extreme Atomic Systems -- Kleinwalsertal (2022)

Self-oscillation, synchronization and topology – the electron shuttle revisited
Atomic Summer Camp 2021, PKS-MPG -- Dresden (2021)

Dissipative nonequilibrium synchronization of topological edge states via self-oscillation
German Physical Society Spring Meeting - virtual (2021)

Dissipative nonequilibrium synchronization of topological edge states via self-oscillation
APS March Meeting - virtual (2021)

Stochastic thermodynamics of self-oscillations: the electron shuttle
German Physical Society Spring Meeting - Regensburg (2019)

Stochastic thermodynamics based on incomplete information: Generalized Jarzynski equality with measurement errors with or without feedback
German Physical Society Spring Meeting - Dresden (2017)

talks in universities and research institutes

Topological synchronization of quantum van der Pol oscillators
Joint Group Seminar of Prof. A. Sipahigil & Prof. M. C. Wu  - Berkeley (2022)

Topological synchronization of quantum van der Pol oscillators
Group of Prof. R. Blick at Universität Hamburg - Hamburg (2022)
 
Thermodynamics, synchronization and topology: Various aspects of electron shuttling
Emergent Phenomena/QM Seminar, Condensed Matter Theory Center - Berkeley (2022)

Self-oscillation, synchronization, topology and thermodynamics -- electron shuttle  revisited
Group of Prof. R. Blick at Universität Hamburg - Hamburg (2021)

Self-oscillation, synchronization, topology and thermodynamics -- the electron shuttle
Group of Prof. L. C. Kwek at National University of Singapore - Singapore (2020)

Self-oscillation, heat engines, synchronization and topology - the electron shuttle revisited
Quantum Science Theory Seminar at Université de Genève - Geneva (2020)

Stochastic thermodynamics of self-oscillations: the electron shuttle
Theoretical Quantum Center Workshop at NTT Basic Research Laboratories - Atsugi (2019)

Stochastic thermodynamics of self-oscillations: the electron shuttle
Dahlem Center for Complex Quantum Systems Theory Seminar at Freie Universität Berlin - Berlin (2019)

Other Talks

Wenn Elektronen den Bus nehmen - das Elektron-Shuttle
Dresdner Lange  Nacht  der Wissenschaften - virtuual (2021)

Thermodynamics of self-oscillation at the example of the electron shuttle
Research Training Group 1558 Workshop - Berlin (2018)

Electron shuttle as a model system exhibiting self-oscillations
Research Training Group 1558 Workshop - Templin (2017)

Collaborators

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Prof. Tobias Brandes
Technische Universität Berlin - Germany

Prof. Christopher Jarzynski

University of Maryland - USA


Prof. Sabine H. L. Klapp
Technische Universität Berlin - Germany

Prof. Kae Nemoto
Okinawa Institute of Science and Technology - Japan

Prof. Gloria Platero
Instituto de Ciencia de Materiales de Madrid, CSIC - Spain

Dr. Victor M. Bastidas
NTT Basic Research Laboratory - Japan

Dr. Javier Cerrillo
Universidad Politécnica de Cartagena - Spain

Dr. Alexander Croy
Technische Universität Dresden - Germany

Dr. Josephine Dias
Okinawa Institute of Science and Technology - Japan

Dr. Matthew T. Eiles
Max-Planck-Institut für Physik komplexer Systeme - Germany

Dr. Alexander Eisfeld
Max-Planck-Institut für Physik komplexer Systeme - Germany

Dr. Florian Kogler
Technische Universität Berlin - Germany

Dr. William J. Munro
NTT Basic Research Laboratory - Japan
National Institute of Informatics - Japan

Dr. Gernot Schaller
Helmholtz-Zentrum Dresden - Germany

Dr. Philipp Strasberg
Universitat Autònoma de Barcelona - Spain

Ghassan Abumwis
Max-Planck-Institut für Physik komplexer Systeme - Germany