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- Centre National de la Recherche ScientifiqueFR208 papers
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12 papers · 2 filters
Time operators in stroboscopic wavepacket basis and the time scales in tunneling
P. Bokes
We demonstrate that the time operator that measures the time of arrival of a quantum particle into chosen state can be defined as a self-adjoint quantum-mechanical operator using p…
'Measurement of Quantum Mechanical Operators' Revisited
Leon Loveridge, Paul Busch
The Wigner-Araki-Yanase (WAY) theorem states a remarkable limitation to quantum mechanical measurements in the presence of additive conserved quantities. Discovered by Wigner in 19…
The Everett-Wheeler interpretation and the open future
Anthony Sudbery
I discuss the meaning of probability in the Everett-Wheeler interpretation of quantum mechanics, together with the problem of defining histories. To resolve these, I propose an und…
Effect of perturbations on information transfer in spin chains
R. Ronke, T. P. Spiller, I. D'Amico
Spin chains have been proposed as a reliable and convenient way of transferring information and entanglement in a quantum computational context. Nonetheless, it has to be expected…
Entanglement from density measurements: analytical density-functional for the entanglement of strongly correlated fermions
Vivian V. França, Irene D'Amico
We derive an analytical density functional for the single-site entanglement of the one-dimensional homogeneous Hubbard model, by means of an approximation to the linear entropy. We…
Probability distributions of smeared quantum stress tensors
Christopher J. Fewster, L. H. Ford, Thomas A. Roman
We obtain in closed form the probability distribution for individual measurements of the stress-energy tensor of two-dimensional conformal field theory in the vacuum state, smeared…