| Wednesday 14 May 2025 | |
| Events for day: Wednesday 22 June 2022 |
| 11:00 - 12:00 Wednesday Weekly Seminar - google meet Structure of magnetized strange quark star in perturbative QCD School PARTICLES AND ACCELERATORS We have performed the leading order perturbative calculation to obtain the equation of state (EoS) of the strange quark matter (SQM) at zero temperature under the magnetic field $B = 10^{18} G$. The SQM comprises two massless quark flavors (up and down) and one massive quark flavor (strange). Consequently, we have used the obtained EoS to calculate the maximum gravitational mass and the corresponding radius of the magnetized strange quark star (SQS). We have employed two approaches: the regular perturbation theory (RPT) and the background perturbation theory (BPT). In RPT, the infrared (IR) freezing effect on the coupling constant has not bee ... 13:30 - 15:00 Weekly Seminar (Online) A non-Comoving Universe https://www.skyroom.online/ch/soa/weekly-seminar School ASTRONOMY We consider an inflationary scenario in which the two major fluid components of the early Universe, the scalar field, and the photon gas, say radiation fluid, evolve with distinct four velocities. This cosmological configuration is equivalent to a single anisotropic fluid, expanding with a four-velocity that is a combination of the two-fluid four velocities. The energy density of a single cosmological fluid is larger than the sum of the energy densities of the two inflating cosmological fluids and contains a correction term due to the anisotropy generated by the differences in the four velocities. We obtain the gravitational field equations o ... 14:00 - 15:00 Combinatorics and Computing Weekly Seminar An Introduction to Scientific Machine Learning School MATHEMATICS Scientific computing is a broad, multidisciplinary area that encompasses mathematics, computer science, and applications in science and engineering. This area makes use of the techniques of applied mathematics and computer science for the solution of scientific and engineering problems which are modeled by some differential equations. More recently, solving differential equations via learning methods emerged as a potentially new sub-field under the name of Scientific Machine Learning (SciML). This work advocates a fruitful synergy between machine learning and classical computational physics that has the potential to enrich both fields and lea ... 14:00 - 15:00 Weekly Seminar Condensed Matter and Statistical Physics Group Optimization by a quantum reinforcement algorithm School PHYSICS Date: Wednesday, June 22, 2022 Time: 14:00-15:00 To join the webinar, please follow this link: https://www.skyroom.online/ch/schoolofphysics/condensed-matter-and-statistical-physics and log in as a guest. Abstract: Providing an optimal path to a quantum annealing algorithm is key to find good approximate solutions to computationally hard optimization problems. Reinforcement is one of the strategies that can be used to circumvent the exponentially small energy gaps of the system in the annealing process. We take a local entropy in the configuration space for the reinforcement and app ... 15:30 - 17:00 Webinar What is the Problem of Consciousness? School COGNITIVE SCIENCES Abstract: It is widely believed that consciousness presents a “hard problem”, different in kind from those posed by other aspects of the mind, such as memory or attention. A huge amount of philosophical work has been devoted to this problem. But does consciousness really present such an intractable problem? Or is the problem an imaginary one, created by the way philosophers think about consciousness? What exactly is it that we are trying to explain with a theory of consciousness? This webinar will introduce these issues and suggest that, although consciousness certainly presents many explanatory problems, it doesn’t pose the si ... 15:30 - 17:30 Mathematical Logic Weekly Seminar The Discontinuity Problem School MATHEMATICS We introduce the discontinuity problem and we prove that under the axiom of determinacy it is actually the weakest discontinuous problem in the topological Weihrauch lattice. We also discuss algebraic properties of the discontinuity problem, such as the fact that it parallelizes to the non-computability problem. We also introduce an operation that we call stashing and show that is dual to parallelization. We show that the discontinuity problem is the stashing of LLPO and several variants of it. Zoom info: https://us02web.zoom.us/j/83113646825?pwd=NVpsdERQSXkxWk9McXc1eFFISFc4QT09 Meeting ID: 831 1364 6825 Pa ... 16:00 - 17:00 Mathematics Colloquium Weighted Bounds for Singular Integral Operators School MATHEMATICS Singular integral operators are among important tools in harmonic analysis. In this talk, I will discuss the history and origins of these operators and give some examples. I will also describe the so-called ``Weight theory'' with an overview of some recent results on this subject. To get more information about the colloquium, join the following google group: https://groups.google.com/g/ipm-math-colloquium ... |