Quantum non-causality in spacetime may be not exclusively quantum

          @misc{ pirsa_PIRSA:24090093,
            doi = {10.48660/24090093},
            url = {https://pirsa.org/24090093},
            author = {Verch, Rainer},
            keywords = {Quantum Foundations, Quantum Information},
            language = {en},
            title = {Quantum non-causality in spacetime may be not exclusively quantum},
            publisher = {Perimeter Institute},
            year = {2024},
            month = {sep},
            note = {PIRSA:24090093 see, \url{https://pirsa.org}}
          }
          

Abstract

There are several non-causal effects that have been attributed to quantum physics. These include the analogues of "closed timelike curve effects" in quantum circuits proposed by David Deutsch (D-CTC), and the "impossible measurements" in relativistic quantum field theory discussed by Raphael Sorkin. Based on previous work, it will be pointed out in the talk that the alleged non-causality features arise not only in quantum systems, but in the very same manner in systems that are described in the framework of classical (non-quantum) statistical mechanics or classical field theory. Therefore, although the said non-causality scenarios have been portrayed as pertaining to quantum systems or quantum fields, they are in fact not based on, nor characteristic of, the quantum nature of physical systems.