Prof. Florian Marquardt



  • Director
  • Head of Theory Division
  • Room A.2.104
  • Phone +49 9131 7133 400
  • Email

In our research, we apply tools from condensed matter theory and from quantum optics to a range of questions at the interface of nanophysics and quantum optics, addressing both quantum and classical dynamics. In our approach, we often try to identify the salient features of experimentally relevant situations and condense them into minimalist models which can then be attacked with all the state-of-the-art theoretical tools. At the same time, we also care about the direct contact with experiments, down to designing the classical electromagnetic and acoustic properties of specific structures.


Current interests of the Marquardt group include cavity optomechanics and nanomechanics, quantum information processing, quantum many body physics, and machine learning for physics.


Perturbation theory of optical resonances of deformed dielectric spheres

Andrea Aiello, Jack G. E. Harris, Florian Marquardt

arXiv 1809.02640 (2018) Preprint | PDF

Dynamically Generated Synthetic Electric Fields for Photons

Petr Zapletal, Stefan Walter, Florian Marquardt

arXiv 1806.08191 (2018) Preprint | PDF

Cavity optomagnonics with magnetic textures: coupling a magnetic vortex to light

Jasmin Graf, Hannes Pfeifer, Florian Marquardt, Silvia Viola-Kusminskiy

arXiv 1806.06727 (2018) Preprint | PDF

Quantum theory of continuum optomechanics

Peter Rakich, Florian Marquardt

New Journal of Physics (20) 045005 (2018) | Journal | PDF

Snowflake phononic topological insulator at the nanoscale

Christian Brendel, Vittorio Peano, Oskar Painter, Florian Marquardt

Physical Review B (Rapid Communications) 97(2) 020102 (2018) | Journal | PDF

Reinforcement Learning with Neural Networks for Quantum Feedback

Thomas Fösel, Petru Tighineanu, Talitha Weiss, Florian Marquardt

Physical Review X 8(3) (2018) | Journal | PDF

Quantum nondemolition measurement of mechanical motion quanta

Luca Dellantonio, Oleksandr Kyriienko, Florian Marquardt, Anders S. Sørensen

Nature Communications 9 3621 (2018) | Journal | PDF


Anderson localization of composite excitations in disordered optomechanical arrays

Thales Figueiredo Roque, Vittorio Peano, Oleg M. Yevtushenko, Florian Marquardt

NEW JOURNAL OF PHYSICS 19 013006 (2017) | Journal

Many-Particle Dephasing after a Quench

Thomas Kiendl, Florian Marquardt

PHYSICAL REVIEW LETTERS 118(13) 130601 (2017) | Journal

Quantum-coherent phase oscillations in synchronization

Talitha Weiss, Stefan Walter, Florian Marquardt

PHYSICAL REVIEW A 95(4) 041802 (2017) | Journal

L lines, C points and Chern numbers: understanding band structure topology using polarization fields

Thomas Fösel, Vittorio Peano, Florian Marquardt

New Journal of Physics 19 115013 (2017) | Journal

Cavity optomechanics in a levitated helium drop

L. Childress, M. P. Schmidt, A. D. Kashkanova, C. D. Brown, G. I. Harris, Andrea Aiello, Florian Marquardt, J. G. E. Harris

PHYSICAL REVIEW A 96(6) 063842 (2017) | Journal

Generalized non-reciprocity in an optomechanical circuit via synthetic magnetism and reservoir engineering

Kejie Fang, Jie Luo, Anja Metelmann, Matthew H. Matheny, Florian Marquardt, Aashish A. Clerk, Oskar Painter

NATURE PHYSICS 13(5) 465-471 (2017) | Journal

Pseudomagnetic fields for sound at the nanoscale

Christian Brendel, Vittorio Peano, Oskar J. Painter, Florian Marquardt


From Kardar-Parisi-Zhang scaling to explosive desynchronization in arrays of limit-cycle oscillators

Roland Lauter, Aditi Mitra, Florian Marquardt

Physical Review E 96(1) 012220 (2017) | Journal

For all my publications, please refer to the Publications page.

Florian Kai Marquardt (Dr. phil.)

Born 16.7.1974 in Berlin, Germany

Theoretical Physicist, with research mostly at the intersection between nanophysics and quantum optics

Research topics: optomechanics, quantum optics, decoherence, electronic transport in nanostructures, superconducting circuit cavity quantum electrodynamics, nonequilibrium quantum many-body physics, classical nonlinear dynamics


  • 2016-now Scientific Director at the Max Planck Institute for the Science of Light, Erlangen, Germany. Part-time professor at the university in Erlangen.
  • 2010-2016 Full professor (chair) at Universität Erlangen-Nürnberg at Erlangen, Germany
  • 2005-2010 Junior research group leader (junior professor, Emmy-Noether program) at Ludwig-Maximilians Universität München (LMU), Germany
  • 2003-2005 Postdoctoral fellow at Yale University, USA (group of Steve Girvin)
  • 2002-2003 Postdoctoral fellow in the Swiss National Center for Competence in Research in Nanoscale Science (NCCR), Basel
  • 1999-2002 PhD student at the University of Basel, Switzerland (group of Christoph Bruder)


  • 1999-2002 PhD student at the University of Basel, Switzerland (group of Christoph Bruder); Thesis on "Models of dephasing at low temperatures"; "summa cum laude"
  • 1992-1993, 1994-1998 Studies of physics (Diplom), Universität Bayreuth, Germany; Diploma thesis on vortex motion in superconductors (with Prof. Dierk Rainer); Diploma "with distinction"
  • 1992 Abitur (final high school exam) at Theodor-Heuss Gymnasium Nördlingen, Germany; final grade 1.0

Awards, fellowships and significant grants

  • 2007: Emmy-Noether group leader fellowship of the German Science Foundation (DFG), grant period: 2007-2012
  • 2009: Walter Schottky prize 2009 of the German Physical Society (DPG), "for groundbreaking work on the theory of optomechanical systems"
  • 2011: ERC Starting Grant of the European Research Council, grant period: 2011-2016

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