Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Plávala, Martin"'
Quantum memories are a crucial precondition in many protocols for processing quantum information. A fundamental problem that illustrates this statement is given by the task of channel discrimination, in which an unknown channel drawn from a known ran
Externí odkaz:
http://arxiv.org/abs/2411.08110
We construct a convergent family of outer approximations for the problem of optimizing polynomial functions over convex bodies subject to polynomial constraints. This is achieved by generalizing the polarization hierarchy, which has previously been i
Externí odkaz:
http://arxiv.org/abs/2406.09506
Autor:
Jokinen, Pauli, Weilenmann, Mirjam, Plávala, Martin, Pellonpää, Juha-Pekka, Kiukas, Jukka, Uola, Roope
Operational contextuality forms a rapidly developing subfield of quantum information theory. However, the characterization of the quantum mechanical entities that fuel the phenomenon has remained unknown with many partial results existing. Here, we p
Externí odkaz:
http://arxiv.org/abs/2406.07305
Bell nonlocality is a fundamental phenomenon of quantum physics as well as an essential resource for various tasks in quantum information processing. It is known that for the observation of nonlocality the measurements on a quantum system have to be
Externí odkaz:
http://arxiv.org/abs/2403.10564
We investigate joint probabilistic choice rules describing the behavior of two decision makers, each facing potentially distinct menus. These rules are separable when they can be decomposed into individual choices correlated solely through their resp
Externí odkaz:
http://arxiv.org/abs/2403.09045
Publikováno v:
Int. J. Quantum Inf. 2440007 (2024)
Encoding and decoding are the two key steps in information processing. In this work we study the encoding and decoding capabilities of operational theories in the context of information-storability game, where the task is to freely choose a set of st
Externí odkaz:
http://arxiv.org/abs/2311.17522
Publikováno v:
Phys. Rev. A 109, 062216 (2024)
Quantumness refers to the peculiar and counterintuitive characteristics exhibited by quantum systems. Tsirelson inequalities have emerged as a powerful tool in quantum theory to detect quantumness and entanglement of harmonic oscillators, spins under
Externí odkaz:
http://arxiv.org/abs/2309.00021
Publikováno v:
Phys. Rev. A 109, 032627 (2024)
Communication scenarios between two parties can be implemented by first encoding messages into some states of a physical system which acts as the physical medium of the communication and then decoding the messages by measuring the state of the system
Externí odkaz:
http://arxiv.org/abs/2308.07727
Publikováno v:
Phys. Rev. A 109, 062203 (2024)
We develop a method for semi-device-independent certification of number of measurements. We achieve this by testing whether Bob's steering equivalent observables (SEO) can be simulated by k measurements, which we do by testing whether they are k-comp
Externí odkaz:
http://arxiv.org/abs/2307.13737
Autor:
Ohst, Ties-A., Plávala, Martin
We develop the theory of Wigner representations for a large class of operational theories that include both classical and quantum theory. The Wigner representations that we introduce are a natural way to describe the theory in terms of some fixed obs
Externí odkaz:
http://arxiv.org/abs/2306.11519