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- Centre National de la Recherche ScientifiqueFR493 papers
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6 papers · 2 filters
Moment operators of the Cartesian margins of the phase space observables
J. Kiukas, P. Lahti, K. Ylinen
The theory of operator integrals is used to determine the moment operators of the Cartesian margins of the phase space observables generated by the mixtures of the number states. T…
Notes on coarse grainings and functions of observables
A. Dvurecenskij, P. Lahti, S. Pulmannova +1
Using the Naimark dilation theory we investigate the question under what conditions an observable which is a coarse graining of another observable is a function of it. To this end,…
Two questions on quantum statistics
Pekka Lahti, Juha-Pekka Pellonpaa, Kari Ylinen
The determination of a quantum observable from the first and second moments of its measurement outcome statistics is investigated. Operational conditions for the moments of a proba…
The complementarity of quantum observables: theory and experiment
P. Busch, P. J. Lahti
Three notions of complementarity - operational, probabilistic, and value complementarity - are reanalysed with respect to the question of joint measurements and compared with refer…
Lindblad and non--Lindblad type dynamics of a quantum Brownian particle
S. Maniscalco, J. Piilo, F. Intravaia +2
The dynamics of a typical open quantum system, namely a quantum Brownian particle in a harmonic potential, is studied focussing on its non-Markovian regime. Both an analytic approa…
Position and momentum observables on R and on R^3
C. Carmeli, T. Heinonen, A. Toigo
We characterize all position and momentum observables on R and on R^3. We study some of their operational properties and discuss their covariant joint observables.