Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Caslav Brukner"'
Autor:
Veronika Baumann, Časlav Brukner
Publikováno v:
Quantum, Vol 8, p 1481 (2024)
The Wigner's friend experiment is a thought experiment in which a so-called superobserver (Wigner) observes another observer (the friend) who has performed a quantum measurement on a physical system. In this setup Wigner treats the friend, the system
Externí odkaz:
https://doaj.org/article/38fc387d4009486fa57a8ec60bfd0ddc
Publikováno v:
Quantum, Vol 8, p 1440 (2024)
Since their first introduction, Quantum Reference Frame (QRF) transformations have been extensively discussed, generalising the covariance of physical laws to the quantum domain. Despite important progress, a formulation of QRF transformations for Lo
Externí odkaz:
https://doaj.org/article/e11459224c38415ebe4d8055e9b25ad0
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-15 (2023)
Abstract The current theories of quantum physics and general relativity on their own do not allow us to study situations in which the gravitational source is quantum. Here, we propose a strategy to determine the dynamics of objects in the presence of
Externí odkaz:
https://doaj.org/article/73a9dcdb352d4237adeffe40fce7f91a
Publikováno v:
Physical Review Research, Vol 4, Iss 1, p 013180 (2022)
One of the most fundamental open problems in physics is the unification of general relativity and quantum theory to a theory of quantum gravity. An aspect that might become relevant in such a theory is that the dynamical nature of causal structure pr
Externí odkaz:
https://doaj.org/article/7c406bfe9ffc4bcd8608f9111911534c
Autor:
Giulia Rubino, Gonzalo Manzano, Lee A. Rozema, Philip Walther, Juan M. R. Parrondo, Časlav Brukner
Publikováno v:
Physical Review Research, Vol 4, Iss 1, p 013208 (2022)
The study of thermodynamic fluctuations allows one to relate the free energy difference between two equilibrium states with the work done on a system through processes far from equilibrium. This finding plays a crucial role in the quantum regime, whe
Externí odkaz:
https://doaj.org/article/f2dda27d8df9498db878f2cf4aecb75a
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
Realization of indefinite causal order (ICO), a theoretical possibility that even causal relations between physical events can be subjected to quantum superposition, apart from its general significance for the fundamental physics research, would also
Externí odkaz:
https://doaj.org/article/6edad352c32a49c987e9984621565271
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043138 (2021)
In physical experiments, reference frames are standardly modeled through a specific choice of coordinates used to describe the physical systems, but they themselves are not considered as such. However, any reference frame is a physical system that ul
Externí odkaz:
https://doaj.org/article/ddb0a0a1aa6f4a6e8739cd52962a84fd
Autor:
Martin J. Renner, Časlav Brukner
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043012 (2021)
Research on indefinite causal structures is a rapidly evolving field that has a potential not only to make a radical revision of the classical understanding of space-time but also to achieve enhanced functionalities of quantum information processing.
Externí odkaz:
https://doaj.org/article/a9b35f20c5684c709eb2883bd5ab5ae9
Autor:
Giulia Rubino, Lee A. Rozema, Daniel Ebler, Hlér Kristjánsson, Sina Salek, Philippe Allard Guérin, Alastair A. Abbott, Cyril Branciard, Časlav Brukner, Giulio Chiribella, Philip Walther
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013093 (2021)
In quantum communication networks, wires represent well-defined trajectories along which quantum systems are transmitted. In spite of this, trajectories can be used as a quantum control to govern the order of different noisy communication channels, a
Externí odkaz:
https://doaj.org/article/69c02f9cae1e4226b94f4a6365f2c71a
Publikováno v:
Quantum, Vol 4, p 316 (2020)
Quantum correlations which violate a Bell inequality are presumed to power better-than-classical protocols for solving communication complexity problems (CCPs). How general is this statement? We show that violations of correlation-type Bell inequalit
Externí odkaz:
https://doaj.org/article/70cbb9dee47b4e82baf89fbd8cf5cc24