Arrangementer

Kommende 5 dager

i dag apr.
Tid og sted: 26. apr. 2017 12:15 - 13:00, Seminar room KV346, Chemistry Building

Atle Bjørnerud, Oslo Universitetssykehus og Fysisk institutt, UiO

Tid og sted: 26. apr. 2017 13:05 - 14:00, Ø467

Jon Magne Leinaas, FI

I will discuss how one-dimensional interacting fermion systems, which in the low energy approximation are described by Luttinger liquid theory, can be reformulated as systems of weakly interacting particles with fractional charge and statistics. The approach is to use Landau's phenomenological approach to Fermi liquid theory, with quasiparticles interpreted as adiabatically dressed fermions. In an earlier publication the local charge carried by these excitations has been shown to be a fraction of the fermion charge. I will here focus on the statistics of the quasiparticles and show that by a change of momentum variables the Landau parameters of the generalized Fermi fluid can be transformed to zero. This change in interaction is compensated by a change of the Pauli exclusion, which is consistent with the interpretation of the quasiparticles as satisfying generalized exclusion statistics.

(The slides will be available here)

28 apr.
Tid og sted: 28. apr. 2017 15:15 - 16:00, Seminar room FV414

By Torunn Kjeldstad, from Light and Electricity from Novel Semiconductors (LENS), UiO

Flere kommende arrangementer

Tid og sted: 24. mai 2017 12:15 - 13:00, Seminarrom KV346, Kjemibygningen

Johan Blakkisrud, Avdeling for diagnostisk fysikk, Rikshospitalet, Oslo Universitetssykehus

Tid og sted: 24. mai 2017 13:05 - 14:00, Ø467

Kjetil Børkje, University College of Southeast Norway

I will discuss ongoing work on cavity optomechanical systems, where electromagnetic radiation in a cavity interacts with the motion of nano- or microscale objects via radiation pressure. Such interactions have been exploited in order to bring mechanical systems into the quantum regime, but also in order to manipulate light or microwave radiation. Due to a small coupling constant, this has so far involved driving the cavity with a large number of photons. In this talk, I will discuss how single photons can be controlled or detected using optomechanical interactions. In particular, I will explore whether this is possible even if the system is not in the so-called strong coupling regime.

(The slides will be available here)

Tid og sted: 30. mai 2017 12:15 - 13:00, Seminarrom KV 346 Kjemibygget

Einar Dale, Kreftklinikken, OUS

Tid og sted: 31. mai 2017 12:15 - 13:00, Seminarroom KV346 Chemistry Building

Iosif Papoutsis, Fysisk institutt, UiO

Tid og sted: 7. juni 2017 12:15 - 13:00, Seminar Room KV346 Chemistry Buiding

Emil K.S. Espe, Ullevål Hospital, OUS