Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPA
Subjects cond-mat
Date Monday 16 December 2019
Time 13:30
Institute LPENS
Seminar Room Conf IV
Speaker's Last Name Paravicini-Bagliani
Speaker's First Name Gian-Lorenzo
Speaker's Email Address
Speaker's Institution ETH Zürich
Title Magneto-transport in 2DEG ultra-strongly coupled to a Cavities Vacuum-Field
Abstract According to quantum mechanics, an electromagnetic mode without real photon excitations is non-trivial. It gives rise to vacuum electric field fluctuations. Despite averaging to zero over time, these fluctuations are responsible for the spontaneous emission, the Lamb shift and the Casimir effect. Using Landau polaritons, we demonstrate experimentally that the vacuum electric field acts on electron transport. The DC magneto- resistance of the cavity-embedded 2D electron gas is changed due to the coupling to vacuum. Intriguingly, our experimental platform allows to tune the vacuum mode in-situ, while observing the response in the resistance.
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