1. Photon correlation in nonlinear optical processes was first investigated for parametric scattering of light in a x (2) medium, where a photon is split into a pair of photons. Many consequences of this phenomenon in both parametric scattering and parametric generation of light in a cavity are now known. Among the consequences in quantum optics we mention the generation of squeezed light and t...

The intensity of two-photon-excited fluorescence measured relative to the intensity of hyper-Rayleigh scattering in the same apparatus was used to determine the two-photon-excited fluorescence cross sections of the xanthene dyes Rhodamine B, Rhodamine 6G, and Fluorescein. The measured cross sections at l0 5 1064 nm are s2PF (2) 5 1.5 6 0.3 3 10250 cm4 s, 2.0 6 0.4 3 10250 cm4 s, and 1.4 6 0.3 3...

We use the solutions to the recursion relations for double-off-shell fermion currents to compute helicity amplitudes for n-photon scattering and electronpositron annihilation to photons in the massless limit of QED. The form of these solutions is simple enough to allow all of the integrations to be performed explicitly. For n-photon scattering, we find that unless n = 4, the amplitudes for the ...

We investigate distributions of crystal violet and malachite green on plasmonic surfaces by principal component analysis (PCA) imaging of surface-enhanced hyper-Raman scattering (SEHRS) data. As a two-photon excited Raman scattering process, SEHRS provides chemical structure information based on molecular vibrations, but follows different selection rules than the normal, one-photon excited surf...

We use dynamical mean field theory to find an exact solution for inelastic light scattering in strongly correlated materials such as those near a quantum-critical metal-insulator transition. We evaluate the results for q=0 (Raman) scattering and find that resonant effects can be quite large, and yield a double resonance, a significant enhancement of nonresonant scattering peaks, a joint resonan...

We present a model for electron scattering off nuclei and photon absorption in the resonance energy region (W ≦ 2 GeV). The elementary γ/γ ⋆ N-vertex is described using in-medium kine-matics and up-to-date form factors for QE-scattering, π-production form-factors and resonance helicity amplitudes of the MAID analysis. We find good agreement with inclusive data on electron scattering off Oxygen....

We propose using spontaneous Raman scattering from an optically driven Bose-Einstein condensate as a source of atom-photon pairs whose internal states are maximally entangled. Generating entanglement between a particle which is easily transmitted (the photon) and one which is easily trapped and coherently manipulated (an ultracold atom) will prove useful for a variety of quantum-information rel...

We clarify some misleading mistakes in the literature about the phase space for the one-photon production in electron-proton scattering and present the correct overall phase space factor in the cross section formula. Our conclusion is that the earlier diquark model predictions for the cross sections and spin asymmetries of the one-photon production in electron-proton scattering are unreliable. ...

Monte Carlo simulation of photon scattering, with and without abnormal tissue placed at various locations in the rectangular, semi-circular and semi-elliptical tissue models, has been carried out. The absorption coefficient of the tissue considered as abnormal is high and its scattering coefficient low compared to that of the control tissue. The placement of the abnormality at various locations...

The pseudoscalar pole contribution is the dominant source of the O(α 3) hadronic light-by-light scattering effect in muon g − 2. We have examined this contribution taking account of the off-shell structure of the pseudoscalar-photon-photon anomaly vertex deduced from available experimental data. Our work leads to an improved estimate, −79.2 (15.4) × 10 −11 , for the total hadronic light-by-ligh...