Kolloquien


Kolloquien

Die Gastvorträge im Rahmen des MPQ-Kolloquiums finden von April bis Juli sowie von Oktober bis Januar jeweils dienstags um 14:30 Uhr statt. Verantaltungsort ist der Herbert-Walther-Hörsaal im Foyer des Max-Planck-Instituts für Quantenoptik.

Ansprechpartner für die wissenschaftliche Organisation:

Dr. Stephan Dürr und Dr. Thomas Udem

Wenn Sie einen Vortrag im Livestream verfolgen möchten, ist es nötig, dass Sie sich in eine entsprechende Mailing Liste eintragen. Daraufhin erhalten Sie Instruktionen zum Empfang des Livestreams.

Complexity in quantum field theory (Dr. Michal Heller)

Complexity in quantum field theory
Recent developments in holography (AdS/CFT) has led to a conjecture that spacetime volume inside a black hole is related to complexity in a dual quantum field theory. This development has provided strong stimulous for understanding definitions and properties of complexity in quantum field theory and I will review some of the results in this emerging area. [mehr]

Topological Superconductivity and Majorana Fermions in Coupled Wires (Fan Yang)

Topological Superconductivity and Majorana Fermions in Coupled Wires
In the first part, we present a theoretical study of the interplay between topological p-wave superconductivity, orbital magnetic fields and quantum Hall phases in coupled wire systems. We consider two-dimensional systems made of weakly coupled ladders. There, we engineer a p+ip superconductor with the chiral Majorana edge current and describe a generalization of the ν = 1/2 fractional quantum Hall phase. These phases might be realized in solid-state or cold-atom nanowires. For the second part, we will address the spin ladder analogs of the Kitaev honeycomb model. A generalized phase diagram for the two-leg ladder system is obtained together with a driven time-dependent protocol based on superconducting box circuits. [mehr]

Heavy Neutrinos as a Key to understand the Universe (Prof. Marco Drewes)

Heavy Neutrinos as a Key to understand the Universe
Neutrino flavour oscillations indicate that neutrinos have tiny masses. They are the only firmly established proof of physics beyond the Standard Model of particle physics that has been observed in the laboratory. Understanding the origin of neutrino masses may therefore provide a key to understand how the Standard Model should be embedded in a more fundamental theory of Nature. [mehr]

Polariton-electron interactions in two dimensional materials (Prof. Atac Imamoglu)

Polariton-electron interactions in two dimensional materials
Two dimensional materials provide new avenues for synthesizing compound quantum systems. Monolayers with vastly different electric, magnetic or optical properties can be combined in van der Waals heterostructures which ensure the emergence of new functionalities; arguably, the most spectacular example to date is the observation of strong correlations and low electron density superconductivity in Moire superlattices obtained by stacking two monolayers with a finite twist angle. [mehr]

Ultracold atoms carrying orbital angular momentum in lattices of rings: topology and quantum magnetism ( Prof. Veronica Ahufinger)

Ultracold atoms carrying orbital angular momentum in lattices of rings: topology and quantum magnetism
In this talk, we discuss the physics of ultracold atoms carrying Orbital Angular Momentum (OAM) in lattices of ring potentials both in the single-particle and in the Mott insulator limits. In the former limit, we find topologically protected edge states. In the latter limit, we show that the system can realize a variety of spin-1/2 models, including the XYZ Heisenberg model with or without external field. [mehr]
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