Results 71 to 80 of about 87,936 (180)

Joint observables induced by indirect measurements in cavity QED

open access: yesFrontiers in Quantum Science and Technology
A fundamental feature of quantum mechanics is that there are observable pairs that cannot be measured jointly, such as observables corresponding to position and momentum or spin direction measurements.
Kalle Raikisto, Kimmo Luoma
doaj   +1 more source

Operational theories and Categorical quantum mechanics

open access: yes, 2012
A central theme in current work in quantum information and quantum foundations is to see quantum mechanics as occupying one point in a space of possible theories, and to use this perspective to understand the special features and properties which single ...
Abramsky, Samson, Heunen, Chris
core   +1 more source

A link between static and dynamical perturbation theory

open access: yesNew Journal of Physics
Dynamics, the physical change in time and a pillar of natural sciences, can be regarded as an emergent phenomenon when the system of interest is part of a larger, static one.
Sebastian Gemsheim
doaj   +1 more source

The Einstein-Podolsky-Rosen Argument and the Bell Inequalities [PDF]

open access: yes, 2007
In 1935 Einstein, Podolsky, and Rosen (EPR) published an important paper in which they claimed that the whole formalism of quantum mechanics together with what they called ``Reality Criterion'' imply that quantum mechanics cannot be complete.
E. Szabó, László
core   +2 more sources

Two recent theoretical advances with potential impact on quantum technology

open access: yesAPL Quantum
Research aimed at elucidating the foundations of quantum theory can have a direct impact on quantum technology. Two examples illustrate this potential: (1) the coupling of quantum systems to arbitrary classical environments that can be described by ...
Hans Christian Öttinger
doaj   +1 more source

Epistemological Problems of Quantum Mechanics Following Ernst Cassirer and Richard Hönigswald

open access: yesRUDN Journal of Philosophy
This article deals with the Copenhagen interpretation of quantum mechanics and its epistemological discussion by Ernst Cassirer and Richard Hönigswald. The starting point is Cassirer's treatise Determinism and Indeterminism in Modern Physics, published ...
Reinhold Breil
doaj   +1 more source

Equilibration time scales in closed many-body quantum systems

open access: yesNew Journal of Physics, 2018
We show that the physical mechanism for the equilibration of closed quantum systems is dephasing, and identify the energy scales that determine the equilibration timescale of a given observable.
Thiago R de Oliveira   +4 more
doaj   +1 more source

Quantum causal modelling

open access: yesNew Journal of Physics, 2016
Causal modelling provides a powerful set of tools for identifying causal structure from observed correlations. It is well known that such techniques fail for quantum systems, unless one introduces ‘spooky’ hidden mechanisms.
Fabio Costa, Sally Shrapnel
doaj   +1 more source

The POVM Theorem in Bohmian Mechanics

open access: yesEntropy
The POVM theorem is a central result in Bohmian mechanics, grounding the measurement formalism of standard quantum mechanics in a statistical analysis based on the quantum equilibrium hypothesis (the Born rule for Bohmian particle positions).
Christian Beck, Dustin Lazarovici
doaj   +1 more source

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