Results 21 to 30 of about 3,086 (259)

What Does the Operator Algebra of Quantum Statistics Tell Us about the Objective Causes of Observable Effects?

open access: yesEntropy, 2020
Quantum physics can only make statistical predictions about possible measurement outcomes, and these predictions originate from an operator algebra that is fundamentally different from the conventional definition of probability as a subjective lack of ...
Holger F. Hofmann
doaj   +1 more source

Quantifying quantum causal influences

open access: yesPhysical Review A, 2023
12 pages, 3 figures. Comments welcome!
Lucas Hutter   +4 more
openaire   +2 more sources

Heisenberg's Philosophical Approaches in the Development of Quantum Mechanics with the Copenhagen Interpretation [PDF]

open access: yesJournal of Philosophical Investigations, 2021
Heisenberg is one of the founders of quantum mechanics, and one of the pioneers and intellectual leaders of the Copenhagen interpretation of quantum mechanics. He proposed in two seminal papers in 1925 and 1927, the fundamentals of matrix mechanics (1925)
Seyyed Hedayat Sajadi
doaj   +1 more source

Quantum causal histories [PDF]

open access: yesClassical and Quantum Gravity, 2000
Quantum causal histories are defined to be causal sets with Hilbert spaces attached to each event and local unitary evolution operators. The reflexivity, antisymmetry, and transitivity properties of a causal set are preserved in the quantum history as conditions on the evolution operators.
openaire   +2 more sources

Quantum Entropic Causal Inference [PDF]

open access: yesQuantum Information and Measurement VI 2021, 2021
Inferring causality from observational data alone is one of the most important and challenging problems in statistical inference. We propose a greedy algorithm for quantum entropic causal inference that unifies classical and quantum causal inference.
Mohammad Ali Javidian   +3 more
openaire   +2 more sources

Quantum Common Causes and Quantum Causal Models [PDF]

open access: yesPhysical Review X, 2017
23 pages.
Allen, John-Mark A.   +4 more
openaire   +6 more sources

Updating the Born rule

open access: yesNew Journal of Physics, 2018
Despite the tremendous empirical success of quantum theory there is still widespread disagreement about what it can tell us about the nature of the world.
Sally Shrapnel   +2 more
doaj   +1 more source

Bounds on transport from hydrodynamic stability

open access: yesPhysics Letters B, 2023
It was recently shown that the dispersion relations describing singularities of retarded two-point functions in causal quantum field theories always satisfy the fundamental inequality Imω≤|Imk|, and that several rigorous bounds on transport coefficients ...
L. Gavassino
doaj   +1 more source

Information Causality in the Quantum and Post-Quantum Regime [PDF]

open access: yesScientific Reports, 2014
Quantum correlations can be stronger than anything achieved by classical systems, yet they are not reaching the limit imposed by relativity. The principle of information causality offers a possible explanation for why the world is quantum and why there appear to be no even stronger correlations.
Ringbauer, Martin   +3 more
openaire   +5 more sources

Quantum superpositions of ‘common-cause’ and ‘direct-cause’ causal structures

open access: yesNew Journal of Physics, 2017
The constraints arising for a general set of causal relations, both classically and quantumly, are still poorly understood. As a step in exploring this question, we consider a coherently controlled superposition of ‘direct-cause’ and ‘common-cause ...
Adrien Feix, Časlav Brukner
doaj   +1 more source

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