Tuesday 23 January 2018 |

Events for day: Wednesday 06 September 2017 |

11:00 - 12:00 Computational Nano Science journal clubMarkov state model of the two-state behaviour of water School NANO SCIENCES Markov state model of the two-state behaviour of waterWith the help of a Markov State Model (MSM), two-state behaviour is resolved for two computer models of water in a temperature range from 255 K to room temperature (295 K). The method is first validated for ST2 water, for which the so far strongest evidence for a liquid-liquid phase transition exists. In that case, the results from the MSM can be cross-checked against the radial distribution function g5(r) of the 5th-closest water molecule around a given reference water molecule. The latter is a commonly used local order parameter, which exhibits a bimodal distribution j ... 12:00 - 13:00 Quantum information biweekly journal clubFundamental limitations for quantum and nanoscale thermodynamics (Continuation)School NANO SCIENCES Fundamental limitations for quantum and nanoscale thermodynamics The relationship between thermodynamics and statistical physics is valid in the thermodynamic limit-when the number of particles becomes very large. Here we study thermodynamics in the opposite regime-at both the nanoscale and when quantum effects become important. Applying results from quantum information theory, we construct a theory of thermodynamics in these limits. We derive general criteria for thermodynamical state transitions, and, as special cases, find two free energies: one that quantifies the deterministically extractable work from a small system i ... 14:00 - 15:30 Weekly SeminarAnisotropic Gravitational Collapse and Cosmic Jets School ASTRONOMY Consider a dynamic general relativistic spacetime in which the proper infinitesimal interval along one spatial coordinate direction decreases monotonically with time, while the corresponding intervals increase along other spatial directions. In a system undergoing such complete anisotropic collapse/expansion, we look for the formation of a cosmic double-jet configuration: free test particles in the ambient medium, relative to the collapsing system, gain energy from the gravitational field and asymptotically line up parallel and antiparallel to the direction of collapse such that their Lorentz factors approach infinity. A strong burst of elect ... 14:00 - 15:00 Weekly SeminarCondensed Matter and Statistical Physics Group Underdamped scaled Brownian motion: (non-)existence of the overdamped limit in anomalous diffusion School PHYSICS Seminar Room (classroom A), Farmanieh Building, IPM ... 14:00 - 15:00 Weekly SeminarUnderdamped scaled Brownian motion: (non-)existence of the overdamped limit in anomalous diffusion School NANO SCIENCES Underdamped scaled Brownian motion: (non-)existence of the overdamped limit in anomalous diffusionModern microscopic techniques have led to the discovery of a multitude of anomalous diffusion processes which show significant deviations from the laws of Brownian motion in a variety of animate and inanimate systems. The nature of anomalous diffusion is non-universal and may originate from numerous physical processes. There exist a variety of theoretical models sharing the same non Fickian Mead Squared Displacements, including continuous time random walk models for particle motion in heterogeneous environments, and stochastic ... 15:30 - 16:30 Weekly SeminarAccelerator Physics From the Beginning to the Current Status School PARTICLES AND ACCELERATORS Nowadays, several thousand accelerators are at work around the world in an extensive area of applications, ranging from industrial processes to scientific discoveries. Todays particle accelerators address many of the confronting challenges like energy, environment, economy and industry for the worldwide nations. Fast growing in such requirements, persuades the nations to match themselves in this research context, putting the accelerators to work on the challenges of our time. In this talk, we have a brief overview on the field of accelerator physics from the historical point of view and try to answer some fundamental questions about the acc ... 16:00 - 17:00 Monthly ColloquiumReclaiming the "identity" of atoms in molecules and crystals as "real-space" quantum subsystems School NANO SCIENCES Reclaiming the "identity" of atoms in molecules and crystals as "real-space" quantum subsystemsSince the discovery of electron, at the dawn of the previous century, atoms gradually lost their position as "fundamental" building block of matter and instead matter is conceived to be composed electrons and nuclei as far as one is not concerned with the high-energy physics. In contrast to this "paradigm" shift in theoretical physics, most experimental scientists in condensed matter physics, chemistry, material science and molecular biology are yet conceiving matter in various forms, e.g. molecules, biomolecules, crystals, as com ... |