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dc.contributor.author
Paravicini Bagliani, Gian Lorenzo Simone
dc.contributor.supervisor
Faist, Jérôme
dc.contributor.supervisor
Ciuti, Cristiano
dc.contributor.supervisor
Ebbesen, Thomas W.
dc.contributor.supervisor
Scalari, Giacomo
dc.date.accessioned
2020-04-07T12:19:24Z
dc.date.available
2019-04-01T09:26:35Z
dc.date.available
2019-04-01T12:00:33Z
dc.date.available
2020-04-07T12:19:24Z
dc.date.issued
2019
dc.identifier.uri
http://hdl.handle.net/20.500.11850/335080
dc.identifier.doi
10.3929/ethz-b-000335080
dc.description.abstract
Quantum electrodynamics predicts a non-trivial ground state for an electromagnetic mode. In the absence of photons, the so called zero-point energy of $\frac{1}{2}\hbar\omega$ remains. It gives rise to vacuum electric field fluctuations and important physical effects such as the spontaneous emission, the Lamb shift and the Casimir effect. Experimentally, it remains difficult to tune vacuum field modes and directly observe their physical consequences. By engineering vacuum fields in cavities one can reach a peculiar situation: an electronic excitation of matter can be revived after its decay by photon emission. In this so called strong light-matter coupling regime, the hybrid light-matter excitations (polaritons) are mostly probed with photonic excitations. Such an approach hides, that the coupling arises already from the vacuum field fluctuations in absence of photons. In this work, we develop an experimental platform allowing to probe the electronic part of the polaritonic ground state. Intriguingly, we can tune vacuum field modes, while observing the response in the matter part. It is implemented with a cavity-embedded 2D electron gas in the ultrastrong coupling regime and probed by magneto-transport. Transport - depending on virtual transitions to excited states - is modified, as these transitions become the polaritons in presence of a vacuum Rabi splitting. After a theoretical discussion, we experimentally show that few polariton excitations and also vacuum fields alone modify transport. This opens the way to vacuum-field-controlled many-body states in quantum Hall systems.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Vacuum Rabi splitting
en_US
dc.subject
Polaritons
en_US
dc.subject
Quantum Hall transport
en_US
dc.subject
Two-dimensional electron gas (2-DEG)
en_US
dc.subject
Terahertz frequency
en_US
dc.subject
Ultrastrong Light-Matter Coupling
en_US
dc.title
Magneto -Transport in Engineered Vacuum Fields
en_US
dc.type
Doctoral Thesis
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2019-04-01
ethz.size
154 p.
en_US
ethz.code.ddc
DDC - DDC::5 - Science::530 - Physics
en_US
ethz.identifier.diss
25707
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02510 - Institut für Quantenelektronik / Institute for Quantum Electronics::03759 - Faist, Jérôme / Faist, Jérôme
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02510 - Institut für Quantenelektronik / Institute for Quantum Electronics::03759 - Faist, Jérôme / Faist, Jérôme
en_US
ethz.tag
Vacuum Rabi splitting
en_US
ethz.tag
Polaritons
en_US
ethz.tag
Quantum Hall transport
en_US
ethz.tag
Two-dimensional electron gas (2-DEG)
en_US
ethz.tag
Terahertz frequency
en_US
ethz.tag
Ultrastrong Light-Matter Coupling
en_US
ethz.relation.hasPart
10.3929/ethz-b-000190425
ethz.relation.hasPart
10.3929/ethz-b-000324063
ethz.date.deposited
2019-04-01T09:26:46Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.date.embargoend
2020-04-01
ethz.rosetta.installDate
2019-04-01T12:02:40Z
ethz.rosetta.lastUpdated
2022-03-29T01:46:53Z
ethz.rosetta.versionExported
true
ethz.COinS
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