| Thursday 25 April 2024 | |
| Events for day: Wednesday 07 February 2018 |
| 11:00 - 12:00 Quantum information biweekly journal club Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound School NANO SCIENCES Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound A long-standing open problem whether a heat engine with finite power achieves the Carnot efficiency is investgated. We rigorously prove a general trade-off inequality on thermodynamic efficiency and time interval of a cyclic process with quantum heat engines. In a first step, employing the Lieb-Robinson bound we establish an inequality on the change in a local observable caused by an operation far from support of the local observable. This inequality provides a rigorous characterization of the following intuitive picture that most ... 14:00 - 15:30 Weekly Seminar Iranian National Observatory: Construction begins School ASTRONOMY The Iranian National Observatory (INO) project is now well into the construction phase. The project has recently passed a major milestone of the INO340 detail design review, a necessary step to ensure that the design meets the specifications. As a result of this development, the civil construction of the INO340 has begun in Mt Gargash to deliver the 3.4m telescope pier, fixed part of the enclosure, the service building, and the mirror coating hall. The manufacturing/polishing of the secondary mirror, as well as the 1m test mirror, is progressing. Technical materials for the construction of the telescope mount, dome, mirror cell, top unit and ... 14:00 - 16:00 Seminar Neural oscillations and communication in brain circuits School COGNITIVE SCIENCES Venue: School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Opposite the ARAJ, Artesh Highway, Tehran, Iran * To join the mailing list: Send an empty email to: scs at ipm dot ir on the subject of: #join ... 14:00 - 15:00 Weekly Seminar The new era of quantum technologies-quantum simulators in particular... School NANO SCIENCES The new era of quantum technologies-quantum simulators in particular... The frustration in physical realization of a universal quantum computer (UQC) conjectured earlier by R. Feynman mainly owing to real-life decoherence hassles and limitations led in recent years to a constructive shift of the computing paradigm toward the spin-offs of the long-standing efforts, the one referred to as "quantum technologies" (QuTech) with a wide and multidisciplinary range of potential applications in science and engineering: "Quantum simulators" among them promise to revolutionize our simulational capabilities by allowing us to solve other ... 15:30 - 17:00 Geometry and Topology Weekly Seminar Convexity on Riemannian Manifolds School MATHEMATICS The significance of convexity in many areas of geometry is well- known; especially the solutions of some important PDEs, such as Abreu's and Monge-Amper equations, should be convex. In this lecture, by introducing some of the proximal calculus tools, I will talk about separation theorem for convex subsets of Riemannian manifolds. Moreover, I will explain why convexity of distance function $d_S$ to a closed convex subset $S$ of the Riemannian manifold with positive sectional curvature fails in some cases and by imposing some restriction on $S$, independently of curvature of M, the convexity of $d_S$ will be obtained. ... 15:30 - 16:30 Weekly Seminar Simulation of Cherenkov free electron laser School PARTICLES AND ACCELERATORS In this study, Cherenkov free electron lasers (CFELs) are used as a terahertz light source, and their applications are described. The advantage of these lasers, is that they have a simple structure that does not require a wiggler in spite of conventional free electron lasers and the electron beam motion near the surface of waveguide, creates a necessary coupling between electromagnetic radiation and electron beam to generate a coherent amplified radiation. In addition, the energy required to have a specific frequency is much lower than that of the free-electron laser, so that the target can sometimes be achieved with an electron gun. Therefor ... 16:00 - 17:00 Monthly Colloquium The interaction of light with nanoparticles and quantum dots School NANO SCIENCES The interaction of light with nanoparticles and quantum dots The interaction of light with metal nanoparticles and semiconductor quantum dots is interesting!Absorption spectra of fractal clusters of metal particles, the magneto-optical response (Faraday rotation and circular dichroism) of gold and silver clusters, engineering the spectrum by hollow size, extended Mie theory, magnetic hot spots, and hybrid nanoparticle-quantum dot systems will be discussed. Venue:Farmaniyeh Bldg. , Conference Hall. ... 16:00 - 18:00 Neuroimaging Journal Club Disrupted small-world networks in schizophrenia School COGNITIVE SCIENCES Venue: School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Opposite the ARAJ, Artesh Highway, Tehran, Iran ... |