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8 papers · 2 filters
Intrinsic unsharpness and approximate repeatability of quantum measurements
C. Carmeli, T. Heinonen, A. Toigo
The intrinsic unsharpness of a quantum observable is studied by introducing the notion of resolution width. This quantification of accuracy is shown to be closely connected with th…
Quantization and noiseless measurements
J. Kiukas, P. Lahti
In accordance with the fact that quantum measurements are described in terms of positive operator measures (POMs), we consider certain aspects of a quantization scheme in which a c…
Quantum Brownian motion for periodic coupling to an Ohmic bath
J. Piilo, S. Maniscalco, K. -A. Suominen
We show theoretically how the periodic coupling between an engineered reservoir and a quantum Brownian particle leads to the formation of a dynamical steady state which is characte…
On infinite matrices, Schur products, and operator measures
J. Kiukas, P. Lahti, J. -P. Pellonpää
Measures with values in the set of sesquilinear forms on a subspace of a Hilbert space are of interest in quantum mechanics, since they can be interpreted as observables with only…
Microscopic derivation of the Jaynes-Cummings model with cavity losses
M. Scala, B. Militello, A. Messina +2
In this paper we provide a microscopic derivation of the master equation for the Jaynes-Cummings model with cavity losses. We single out both the differences with the phenomenologi…
Heisenberg's Uncertainty Principle
P. Busch, T. Heinonen, P. Lahti
Heisenberg's uncertainty principle is usually taken to express a limitation of operational possibilities imposed by quantum mechanics. Here we demonstrate that the full content of…