We consider an additional fine-tuning problem which afflicts scalar-driven models of inflation. The problem is that successful reheating requires the inflaton be coupled to ordinary matter, and quantum fluctuations of this matter induces Coleman-Weinberg potentials which are not Planck-suppressed. Unlike the flat space case, these potentials depend upon a still-unknown nonlocal functional of the metric which agrees with the Hubble parameter for de Sitter. Such a potential cannot be completely subtracted off by any local action. We numerically consider the effect of subtracting it off at the...
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Seminars
Monday, 30.07.2018 14:00
Shun-Pei Miao (National Cheng Kung University, Taiwan)
Tuesday, 31.07.2018 10:00
Yukio Hasegawa, Yasuo Yoshida, and Howon Kim (The Institute for Solid State Physics, Univ. Tokyo, Kashiwa, 277-8581 Japan)
Using low-temperature ultrahigh vacuum scanning tunneling microscopy (STM) we have obtained real-space images showing orbital order on a Co-terminated surface of CeCoIn5, which is a heavy-fermion superconducting material. Because of the 4-fold symmetry, 3dxz and 3dyz orbitals of the Co atoms are energetically degenerated. However, on the surface, because of the reduced coordination number and resulting enhanced electron correlation, the capability of the electron screening is suppressed. As a result, in order to reduce the Coulomb repulsive energy alternating unoccupation of the two 3d...
Past seminars
Richard Woodard | A Nonlocal Metric Realization of MOND | 27.07.2018 14:00 |
Dr. Dam Thanh Son | From fractional quantum Hall effect to field-theoretic dualities | 26.07.2018 14:00 |
Prof. Oleg Teryaev | Gravitational formfactors and pressure in elementary particles | 25.07.2018 14:00 |
Renato Costa | Singularity free Universe in double field theory | 24.07.2018 14:00 |
Alessandro Drago | What do mergers of neutron stars tell us about nuclear physics? | 17.07.2018 14:00 |
Jarah Evslin | Cosmic Expansion Anomalies as Seen by Baryon Acoustic Oscillations | 12.07.2018 14:00 |
Prof. Andreas Albrecht | Perspectives on Cosmic Inflation | 28.06.2018 14:00 |
Andreas Albrecht | Einselection and Equilibrium | 27.06.2018 14:00 |
Oleksiy Pashkin | Research using high-power infrared radiation from the free-electron lasers in Dresden | 26.06.2018 10:00 |
Wojciech Hellwing | How to falsify CDM (and test its alternatives)? | 25.06.2018 14:00 |
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