| 19 V | Marcin Wieśniak (University of Gdańsk) How to be a Copehagenistic-Qubistic Everettist? Location: B-1-46 AND MS Teams [ZOA-test], 12:15
Department Seminar
Online: [link]
Show abstract
Perception of physical phenomena was a crucial part of survival techniques, which eventually resulted in formulation of physics. Together with the relativity theory, quantum mechanics became a crack on our consistent understanding of the Universe by the means of deterministic classical mechanics. Numerous interpretations have been proposed, prioritizing a special role of the agent (observer), attachement to classical physics concepts, time-reversal symmetry, or even neglecting the physical background alltogether. In this work I attempt to revise the status of these interpretations starting with possibly light luggage of philosophical points of view. If we assume frugality (minimalism in defining new beings), the Copernican principle (that physical laws govern systems irrespective of human role) and physicality (that our observations correspond to reality), we end up with conclusion similar to Everett’s, but not ivalidating main aspects of some other viewpoints. One can now propose a model for a wide variety of quantum measurement devices, define the precise moment of a measurement and provide some answers to both measurement problems of Itamar Pitovski. Wigner’s friend gedankenexperiment shall also be revised in this framework.
This work is a lead article in the “Quantum Measurement” special issue of “Entropy”. |
| 19 V | mgr Rafał Bistroń (IFT UJ) Local Thermal Operations and Classical Communication Location: F-1-04 and ZOOM
14:15
Online: [link], pass: on request!
Chaos and Quantum Info Seminar
Show abstract In this talk, we introduce Local Thermal Operations and Classical Communication (LTOCC), a novel operational framework that unifies the distant laboratories paradigm with thermodynamic restrictions, defining the fundamental limits on transformations between spatially separated systems. We establish a hierarchy of LTOCC protocols, demonstrating inclusion relations between different levels and revealing their deep connection to semilocal thermal operations. To formalize this framework, we develop thermal tensors and bithermal tensors, extending tristochastic tensors to thermodynamic settings and providing new mathematical tools for constrained quantum processes. Furthermore, we explore the role of LTOCC in approximating logical gates such as CNOT and SWAP and investigate its potential to generate correlations between distant systems. |
