Speaker
Josefine Enkner
(ETH Zürich)
Description
We observe how vacuum cavity fields modify magneto-transport in the integer quantum Hall effect. In particular, odd filling factors lose their quantization, while fractional states remain intact. We quantitatively describe this loss of quantization as vacuum field induced resistivity. In our interpretation the interaction with vacuum fields adds a long range perturbation to the system, making it possible for electrons to scatter in between edge and bulk states via an intermediate state containing a virtual particle. This process ultimately breaks the topological protection of the edge states.
Author
Josefine Enkner
(ETH Zürich)
Co-authors
Mr
Felice Appugiese
(ETH Zürich, Institute for Quantum Electronics)
Dr
Gian-Lorenzo Paravicini-Bagliani
(ETH Zürich, Institute for Quantum Electronics)
Dr
Mattias Beck
(ETH Zürich, Institute for Quantum Electronics)
Dr
Christian Reichl
(ETH Zürich, Laboratory for Solid State Physics)
Prof.
Werner Wegscheider
(ETH Zürich, Laboratory for Solid State Physics)
Prof.
Giacomo Scalari
(ETH Zürich, Institude of Quantum Electronics)
Prof.
Cristiano Ciuti
(Universite de Paris, MPQ)
Prof.
Jerome Faist
(ETH Zürich, Institude of Quantum Electronics)
