968 citations
- Centre National de la Recherche ScientifiqueFR12 papers
- Università di CamerinoIT8 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR6 papers
- University of OxfordGB6 papers
- Slovak University of Technology in BratislavaSK5 papers
- Massachusetts Institute of TechnologyUS4 papers
- University of SurreyGB4 papers
- UNSW SydneyAU4 papers
- Daresbury LaboratoryGB3 papers
- IIT@MITUS3 papers
- Instituto de Ciencia de Materiales de MadridES3 papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di LegnaroIT3 papers
6 papers · 2 filters
'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…
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…
Unsharp Quantum Reality
Paul Busch, Gregg Jaeger
The positive operator (valued) measures (POMs) allow one to generalize the notion of observable beyond the traditional one based on projection valued measures (PVMs). Here, we argu…
Position Measurements Obeying Momentum Conservation
Paul Busch, Leon Loveridge
We present a hitherto unknown fundamental limitation to a basic measurement: that of the position of a quantum object when the total momentum of the object and apparatus is conserv…
Quantum Mechanics as a Framework for Dealing with Uncertainty
Paul Busch
Quantum uncertainty is described here in two guises: indeterminacy with its concomitant indeterminism of measurement outcomes, and fuzziness, or unsharpness. Both features were lon…
Duality and the geometric measure of entanglement of general multiqubit W states
Sayatnova Tamaryan, Anthony Sudbery, Levon Tamaryan
We find the nearest product states for arbitrary generalized W states of n qubits, and show that the nearest product state is essentially unique if the W state is highly entangled.…