| Sunday 22 June 2025 | |
| Events for day: Wednesday 11 June 2025 |
| 11:00 - 12:00 Wednesday Weekly Seminar - Hybrid Format Quantum Features of Gravcats School PARTICLES AND ACCELERATORS Abstract: In this talk, I will present a series of studies where I explore the quantum properties of gravitational cats (so-called gravcats) modeled by interacting qubits under a variety of physical conditions. My focus is on understanding how gravcats can preserve quantum correlations in the presence of thermal noise, gravitational interactions, and different environmental decoherence mechanisms. I then extend this investigation to more general environments, including classical stochastic, correlated dephasing channels, and power-law noise, as well as weak measurement interventions. These results show that gravcats serve as r ... 14:00 - 15:00 Combinatorics and Computing Weekly Seminar Efficient Dynamic Rank Aggregation School MATHEMATICS Rank aggregation is a well studied algorithmic problem where, given a set of input preference lists over a set of items, the objective is to compute a single ranking that best summarizes the individual lists. The problem has numerous applications, e.g., in social choice, recommendation systems, and information retrieval. In this talk we tackle this problem in the dynamic setting, and present a practically efficient 2-approximation algorithm with near linear update time for the problem. Based on joint work with Alireza Zarei and Morteza Alimi. Zoom room information: https://us06web.zoom.us/j/84906984159?pwd=BCWaIbXBuku3A5I8 ... 14:00 - 15:00 QPM Weekly Seminar (Hybrid Format) Spatially coherent optical effects in quantum systems School QUANTUM PHYSICS AND MATTER In this presentation, we will study the spatially dependent of the coherent optical phenomena in quantum systems. Here, we will discuss the electromagnetically induced grating via optical composite vortex light in a four-level N-type atomic system. We will show that by controlling the orbital angular momentum of the optical vortex light the diffraction pattern of the Fraunhofer diffraction can be controlled in different regions of the space. Moreover, we will study the spontaneous emission (SE) spectrum of the quantum system in two different quantum systems via optical vortex light. In the first one, we will discuss the spatial pattern of the ... 16:00 - 18:00 Lecture Is Voluntarist Epistemology Useful for Philosophical Debates? School PHILOSOPHY Is Voluntarist Epistemology Useful for Philosophical Debates? ... |