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4 papers · 2 filters
Covariant fuzzy observables and coarse-graining
T. Heinonen, P. Lahti, K. Ylinen
A fuzzy observable is regarded as a smearing of a sharp observable, and the structure of covariant fuzzy observables is studied. It is shown that the covariant coarse-grainings of…
Noise and disturbance in quantum mechanics
P. Busch, T. Heinonen, P. Lahti
The operational meaning of some measures of noise and disturbance in measurements is analyzed and their limitations are pointed out. The cases of minimal noise and least disturbanc…
Simulating quantum Brownian motion with single trapped ions
S. Maniscalco, J. Piilo, F. Intravaia +2
We study the open system dynamics of a harmonic oscillator coupled with an artificially engineered reservoir. We single out the reservoir and system variables governing the passage…
Misbelief and misunderstandings on the non--Markovian dynamics of a damped harmonic oscillator
S. Maniscalco, F. Intravaia, J. Piilo +1
We use the exact solution for the damped harmonic oscillator to discuss some relevant aspects of its open dynamics often mislead or misunderstood. We compare two different approxim…