Calendar of Physics Talks Vienna

A pedagogical introduction to Non-Abelian Anyons, Quasiparticle Interferometry and Topological Quantum Computation
Speaker:Kirill Shtengel (Department of Physics UC Riverside CA 92521 USA)
Abstract:The notion of quantum topological order has been a subject of much interest recently, in part because it falls outside of the well-established Landau paradigm whereby states of matter are classified according to their broken symmetries. Topologically ordered phases cannot be described by any local order parameter, yet they have many peculiar properties clearly distinguishing them form the conventionally disordered phases. For example, in two dimensions, they may support anyonic excitations - the quasiparticles that are neither bosons nor fermions. Moreover, anyons with non-Abelian braiding statistics are expected to occur, particularly in the fractional quantum Hall regime. Interesting in their own right, such systems may also provide a platform for topological quantum computation. Interferometric experiments are likely to play a crucial role in both determining the non-Abelian nature of these states and in their potential applications for quantum computing. I will discuss solid state interferometers designed to detect such non-Abelian quasiparticle statistics. Should these experiments succeed, such interferometers could also become key elements in a topological quantum computer.
Date: Mon, 21.09.2009
Time: 16:00
Location:Ernst-Mach-Hörsaal, Strudlhofgasse 4, 2. Stock, 1090 Wien
Contact:Frank Verstraete

On the Violation of Unitarity in nc gauge models
Speaker:Susanne Urach (Mathematische Physik) (Fakultät für Physik)
Abstract:Informal Seminar
Date: Thu, 24.09.2009
Time: 14:15
Duration: 60 min
Location:Erwin-Schrödinger Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Grosse

Few-optical-cycle solitons and wavelength-tunable few-cycle pulses from an all-fiber laser system
Speaker:Prof. Dr. Arkadi Kim, Russian Academy of Sciences (SFB ADLIS)
Date: Fri, 25.09.2009
Time: 14:00
Duration: 60 min
Location:Seminarraum CBEG02, Institut f. Photonik, Gußhausstr. 27
Contact:Heike Höller, SFB ADLIS Sekretariat, Tel: 58801 13625