596 citations
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39 papers · 1 filter
Static spherically symmetric perfect fluid solutions in theories of gravity
T. Multamaki, I. Vilja
Static spherically symmetric perfect fluid solutions are studied in metric theories of gravity. We show that pressure and density do not uniquely determine ie. given…
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…
Kinematics of the Local Universe XIII. 21-cm line measurements of 452 galaxies with the Nançay radiotelescope, JHK Tully-Fisher relation and preliminary maps of the peculiar velocity field
Gilles Theureau, Mikko Hanski, Nicole Coudreau +2
This paper presents 452 new 21-cm neutral hydrogen line measurements carried out with the FORT receiver of the meridian transit Nançay radiotelescope (NRT) in the period April 2003…
Different quantization mechanisms in single-electron pumps driven by surface acoustic waves
P. Utko, K. Gloos, J. Bindslev Hansen +2
We have studied the acoustoelectric current in single-electron pumps driven by surface acoustic waves. We have found that in certain parameter ranges two different sets of quantize…
Synchrotron Outbursts in Galactic and Extra-galactic Jets, Any Difference?
M. Turler, E. J. Lindfors
We discuss differences and similarities between jets powered by super-massive black holes in quasars and by stellar-mass black holes in microquasars. The comparison is based on mul…
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…