The THEORIE group of MPQ laboratory is pioneering a new frontier of condensed matter physics: the control of electronic transport in cavity systems. The group has theoretically shown that the direct current (dc) magnetotransport of a 2D electron gas can be strongly modified when inserted in an electromagnetic cavity resonator even in the absence of illumination.

A work in collaboration with experimental colleagues at ETHZ has just been published in Nature Physics and a detailed theoretical article appeared in Phys. Rev. B a few weeks earlier.


Left: the electron conductivity tensor is controlled by virtual excitation processes involving cavity polaritons. The linear response conductivity is modified even in the absence of illumination.
Right: a sketch of the sample measured in the magnetotransport experiments at ETHZ, an Hall bar inserted in a THz electromagnetic resonator.

Cristiano Ciuti (

Vacuum-dressed cavity magnetotransport of a two-dimensional electron gas,
Nicola Bartolo and Cristiano Ciuti, Phys. Rev. B 98, 205301 (2018).

Magneto-transport controlled by Landau polariton states, Gian L. Paravicini-Bagliani, Felice Appugliese, Eli Richter, Federico Valmorra, Janine Keller, Mattias Beck, Nicola Bartolo, Clemens Rössler, Thomas Ihn, Klaus Ensslin, Cristiano Ciuti, Giacomo Scalari and Jérôme Faist, Nature Physics 1745-2481 (2018).

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