Search results

89,753 records were found.

Comment: new references added, few sign errors fixed, to appear in Physical Review D
We consider a massless scalar field in 1+1 dimensions satisfying a Robin boundary condition (BC) at a non-relativistic moving boundary. We derive a Bogoliubov transformation between input and output bosonic field operators, which allows us to calculate the spectral distribution of created particles. The cases of Dirichlet and Neumann BC may be obtained from our result as limiting cases. These two limits yield the same spectrum, which turns out to be an upper bound for the spectra derived for Robin BC. We show that the particle emission effect can be considerably reduced (with respect to the Dirichlet/Neumann case) by selecting a particular value for the oscillation frequency of the boundary position.
Comment: 33 pages, 3 figures. v2,v3: typos fixed, refs added, minor changes in sec. 3, formulas corrected in sec. 6. v4: typos fixed
Comment: revtex4, 15 pages, revised version to appear in Physics Letters B
Comment: 10 pages, IOP article style; v3: revised version, accepted for publication in J. Phys. A
Comment: 22 pages, 7 figures; discussion of 't Hooft coupling dependence included
Comment: Latex 10 pages, add a figure and a section, change title
Comment: LaTeX, 23 pages, no figures. This version is identical to the original published paper, but with corrected typos and slight improvements in the exposition. The proof of Theorem 5 stated in the paper has been published in J. Math. Phys. 45 (2004) 1944-1958
Comment: 7 pages, uses iopart.cls
Want to know more?If you want to know more about this cutting edge product, or schedule a demonstration on your own organisation, please feel free to contact us or read the available documentation at http://www.keep.pt/produtos/retrievo/?lang=en