Results 61 to 70 of about 1,869,289 (152)

Decoherence and classical predictability of phase space histories [PDF]

, 1995
We consider the decoherence of phase space histories in a class of quantum Brownian motion models, consisting of a particle moving in a potential $V(x)$ in interaction with a heat bath at temperature $T$ and dissipation gamma, in the Markovian regime ...
A. O. Caldeira, B. L. Hu, C. Anastopoulos, C. Anastopoulos, G. Lindblad, H. Dekker, H. F. Dowker, H. Grabert, J. J. Halliwell, J. P. Paz, J. Twamley, M. Gell-Mann, M. Gell-Mann, R. B. Griffiths, R. Hagedorn, R. Omnès, R. Omnès, R. Omnès, R. Omnès, R. Omnès, V. Ambegaogar   +20 more
core   +2 more sources

Kinetic description of intense beam propagation through a periodic focusing field for uniform phase-space density

Physical Review Special Topics. Accelerators and Beams, 2002
The Vlasov-Maxwell equations are used to investigate the nonlinear evolution of an intense sheet beam with distribution function f_{b}\(x,x^{′},s\) propagating through a periodic focusing lattice κ_{x}\(s+S\)=κ_{x}\(s\), where S=const is the lattice ...
Ronald C. Davidson, Hong Qin, Stephan I. Tzenov, Edward A. Startsev   +3 more
doaj   +1 more source

A universal density slope - velocity anisotropy relation

, 2005
One can solve the Jeans equation analytically for equilibrated dark matter structures, once given two pieces of input from numerical simulations. These inputs are 1) a connection between phase-space density and radius, and 2) a connection between ...
Hansen, Steen H., Moore, Ben, Stadel, Joachim   +2 more
core   +1 more source

A Note on the Entropy Force in Kinetic Theory and Black Holes

Entropy, 2019
The entropy force is the collective effect of inhomogeneity in disorder in a statistical many particle system. We demonstrate its presumable effect on one particular astrophysical object, the black hole.
Rudolf A. Treumann, Wolfgang Baumjohann
doaj   +1 more source

Space station based experimental research on thermophysical properties and solidification mechanisms of Fe-19%Si alloy

Review of Materials Research
The thermophysical properties and rapid solidification mechanism of Fe-19 ​wt%Si alloy were investigated by electrostatic levitation aboard China Space Station and terrestrial drop tube techniques.
L. Hu, W.J. Xie, Z.X. Wan, Q.C. Zhong, Y.H. Jing, H.P. Wang   +5 more
doaj   +1 more source

Transverse linear dynamics in an axisymmetric ionization cooling channel

Physical Review Special Topics. Accelerators and Beams, 2001
This paper outlines a formalism for the description of the linear transverse dynamics of charged particles in an axisymmetric ionization cooling channel.
G. Dugan
doaj   +1 more source

Experimental demonstration of a tomographic five-dimensional phase-space reconstruction

Physical Review Research
Detailed knowledge of particle-beam properties is of great importance to understand and push the performance of existing and next-generation particle accelerators.
S. Jaster-Merz, R. W. Assmann, J. Beinortaitė, J. Björklund Svensson, R. Brinkmann, F. Burkart, P. Craievich, H. Dinter, P. González Caminal, W. Hillert, A. L. Kanekar, M. Kellermeier, W. Kuropka, F. Mayet, J. Osterhoff, B. Stacey, M. Stanitzki, T. Vinatier, S. Wesch, R. D’Arcy   +19 more
doaj   +1 more source

Depletions of Multi-MeV Electrons and Their Association to Minima in Phase Space Density. [PDF]

Geophys Res Lett, 2022
Drozdov AY, Allison HJ, Shprits YY, Usanova ME, Saikin A, Wang D.   +5 more
europepmc   +1 more source

Dispersity-Driven Melting Transition in Two Dimensional Solids

, 1997
We perform extensive simulations of $10^4$ Lennard-Jones particles to study the effect of particle size dispersity on the thermodynamic stability of two-dimensional solids. We find a novel phase diagram in the dispersity-density parameter space.
A. Coniglio, D. Frenkel, D. R. Nelson, D. R. Nelson, D. R. Nelson, E. Dickinson, E. Dickinson, E. Dickinson, H. E. Stanley, H. Eugene Stanley, H. Weber, J. L. Barrat, J. P. McTague, K. Bagchi, K. Binder, L. Bocquet, L. D. Landau, M. A. Glaser, M. A. Glaser, M. P. Allen, M. Reza Sadr-Lahijany, M.-C. Cha, N. Ito, P. G. Bolhuis, P. N. Pusey, Purusattam Ray, W. Vermöhlen, Y. Saito   +27 more
core   +1 more source

Resolving Magnetopause Shadowing Using Multimission Measurements of Phase Space Density. [PDF]

J Geophys Res Space Phys, 2022
Staples FA, Kellerman A, Murphy KR, Rae IJ, Sandhu JK, Forsyth C.   +5 more
europepmc   +1 more source