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Calendar of Physics Talks Vienna
| Quantum phenomena in the realm of cosmology and astrophysics |
| Speaker: | Christine Gruber (Free University Berlin) |
| Abstract: | Modern physical theories provide explanations for processes in both the small dimensions of the quantum world and on cosmologically large scales, but unfortunately a unifying theory valid on all scales does still not exist. In this seminar, we will - in the framework of existing theories - introduce scenarios where quantum effects can however still have consequences on astrophysical or cosmological scales. In one of these examples we will develop a model for dark energy, i.e. the cause of the accelerated expansion of the universe, by calculating the vacuum fluctuations of quantum fields. Via the cancellation of the opposite-sign contributions of bosons and fermions the vacuum energy can explain the observed expansion behavior of the universe. We confirm the validity of the vacuum energy of quantum fields as a possible candidate to explain the behaviour of the cosmic expansion. |
| Date: | Tue, 14.01.2014 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | Univ. of Vienna, Faculty of Physics, Boltzmanngasse 5, 5th floor, Erwin Schrödinger Lecture Hall |
| Contact: | Albert Georg Passegger, Peter Poier - www.univie.ac.at/lunch-seminar |
| On the rigorous construction of integrable quantum field theories |
| Speaker: | Sabina Alazzawi (Univ. Wien) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 14.01.2014 |
| Time: | 14:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
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