IPM Calendar 
Monday 20 November 2017   Today  
Events for day: Wednesday 06 September 2017    
           11:00 - 12:00     Computational Nano Science journal club
Markov state model of the two-state behaviour of water

School
NANO SCIENCES

Markov state model of the two-state behaviour of water

With 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 club
Fundamental 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 Seminar
Anisotropic 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 Seminar
Condensed 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 Seminar
Underdamped 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 diffusion

Modern 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 Seminar
Accelerator 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 Colloquium
Reclaiming 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 subsystems

Since 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 ...