Now showing items 61-70 of 196
Independent oscillator model of a heat bath: Exact diagonalization of the Hamiltonian
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1988-10)
The problem of a quantum oscillator coupled to an independent-oscillator model of a heat bath is discussed. The transformation to normal coordinates is explicitly constructed using the method of Ullersma. With this ...
Experimental evidence for multi-band conduction in highly-doped La-Sr-Cu-O superconductors
(Elsevier, 1987-11-30)
We have measured the Hall coefficient in highly-doped La2-xSrxCuO4 superconductors (x=0.2 and 0.25), finding a large decrease with temperature. A good fit to the data is obtained using the two-band model involving both ...
Raman scattering and photoluminescence studies of two-dimensional electron systems in Ge/GaAs heterostructures
(Elsevier, 1985)
Resonant Raman scattering experiments on n-Ge/n-GaAs (100) heterostructures reveal transitions involving quasi-two-dimensional electron states in Ge-accumulation layers. The experiments were performed in the range of the ...
Higher mass scales and mass hierarchies
(Elsevier, 1989-03-30)
The impact of new interactions at very high energies on the spontaneous breaking of chiral symmetry in gauge field theories is studied. Described at low energies by higher dimension operators, these interactions can enhance ...
Intermittency and Regularity Issues in 3 D Navier-Stokes Turbulence
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2005-07)
Two related open problems in the theory of 3 D Navier-Stokes turbulence are discussed in this paper. The first is the phenomenon of intermittency in the dissipation field. Dissipation-range intermittency was first discovered ...
Sum rule for nonleptonic hyperon decay
(Elsevier, 1970-08-17)
A simple sum rule is derived which relates the p-wave amplitudes to those of the s-wave of the non-leptonic hyperon decay.
Soft breaking of N=4 supersymmetry
(Elsevier, 1983-05-26)
We consider the addition of soft breaking terms to the N=4 supersymmetric Yang-Mills lagrangian. N=1 supersymmetric mass terms and mass terms of the form (A2-B2) do not give rise to any new divergence, which implies that ...
Magnetic-grating free-induction decay and magnetic-grating echo using ultrafast excitation pulses
(Springer-Verlag, 1994-08)
The interaction of atoms with ultrafast, counterpropagating optical fields is considered. The magnetic degeneracy and hyperfine splitting of the atomic levels are included in the calculations, which are carried out for ...
Differential cross section of the reaction [pi]+ + p --> K+ + Y* (1385) at 4.0 and 5.05 GeV/c
(Elsevier, 1969-10-13)
Approximately 1900 events were obtained in the differential cross section measurements of the reaction [pi]+ + p --> K+ + Y* (1385). Forward peaks were found with slopes of 2.3 +/- 0.3 and 2.6 +/- 0.4 (GeV/c)-2 for 4 ...
Deformability of poly(amidoamine) dendrimers
(Springer-Verlag; EDP Sciences, Società Italiana di Fisica, and Springer-Verlag, 2004-05)
Experimental data indicates that poly(amidoamine) (PAMAM) dendrimers flatten when in contact with a substrate, i.e. they are no longer spherical, but resemble flat disks. In order to better understand the deformation ...