The Institute for Theoretical Physics offers the following seminars:
The origin of the fermion mass hierarchy is one of the most compelling and mysterious questions for physics beyond the Standard Model. The discovery of neutrino oscillations and the subsequent measurements of the neutrino mass-squared differences and the lepton mixing angles over the past decade or so has reinvigorated the quest to elucidate the underlying physics that resolves this so-called "flavor puzzle" of the Standard Model. In this talk, I will give an overview of the theoretical approaches to the flavor puzzle, with a focus on the ways in which the neutrino mass and mixing parameters have challenged and extended the basic paradigms for understanding the origin of fermion masses in the Standard Model.
ETH Science City HPV G 4 - Wed 17.12.2014 16:15
Fix a coisotropic submanifold C in a symplectic manifold. We consider the space of coisotropic submanifolds nearby C.
A natural geometric notion of equivalence there is given by Hamiltonian equivalence. On the other hand, there is algebraic characterization of the coisotropic submanifolds near C, as Maurer-Cartan elements of a certain L-infinity algebra introduced by Oh-Park in 2003, which gives rise to an algebraic equivalence. We show that both notions of equivalence agree.
Further, we carry out an analog discussion for the equivalence by symplectomorphisms, and present examples. This is joint work in progress with Florian Schätz (QGM Aarhus)
ETH Science City HG G 19.2 - Thu 11.12.2014 14:15
Silicon is evolving as a versatile photonic platform with multiple functionalities that can be seamlessly integrated. The tool box is rich starting from the ability to guide and amplify multiple wavelength sources at GHz bandwidths, to optomechanical MEMS and opto-fluidics devices. As an example of novel device capabilities, I will discuss the generation of strong optical forces in these ultra small light confining structures. We have recently shown that optical forces can enable controllable, static manipulation of photonic structures, an important step towards enabling recently proposed functionalities for optomechanical devices, such as self-aligning and optical corralling behaviour. These advances should enable future micro-optomechanical systems (MOMS) with novel and distinct functionalities.
ETH Science City HPV G 4 - Wed 10.12.2014 16:15
The causal perturbation theory approach to renormalization, based on the seminal paper of Epstein and Glaser from 1973, is a mathematically rigorous framework which allows to study foundations of perturbative QFT. In this talk I will explain how to incorporate the BV formalism into this framework and derive rigorously the renormalized Quantum Master Equation.
ETH Zentrum HG G 43 - Thu 4.12.2014 15:15
The discovery of the Higgs boson signaled the beginning of a new era of precision in Higgs physics. In the coming decade(s), the experiments of the Large Hadron Collider will perform a plethora of very accurate measurements of phenomena associated with the new particle. These measurements will help us to answer fundamental questions in particle physics. To what extend is the Higgs physics responsible for the mass of the known elementary particles? Is the Higgs boson a portal to dark matter? How sensitive are the Higgs boson interactions to the laws of physics at very high energies? This presentation, emphasises the role pf precision in the theoretical simulations for answering such questions. It gives a flavour of the fascinating physics and the advanced mathematical methods which have been developed for this purpose. It also gives a personal assessment for the future prospects and opportunities in precision Higgs physics.
ETH Science City HPV G 4 - Wed 3.12.2014 16:15