The collapse and revival of a quantum state via this effect was observed by Schoelkopf et al, and Degert et al induced it via terahertz cycling.  The amount of orientational correlation or anisotropy in a liquid solution can be measured using a form of spectroscopy named for this effect. The intensity of this effect can be found by adding a term proportional to the third order susceptibility to the linear susceptibility, then taking the square root of that quantity. Short pulses of light travelling in a medium become self-phase modulated due to this effect, which is also responsible for the shape of spatial (*) solitons. Tubes filled with nitrobenzene or nitrotoluene exhibit this effect quite strongly, and this effect is responsible for cancelling out diffraction in fiber propagation. This effect is heavily suppressed in media without inversion symmetry, and it operates at very high voltages, unlike the linear Pockels effect. For 10 points, name this effect in which the induced birefri
The collapse and revival of a quantum state via this effect was observed by Schoelkopf et al, and Degert et al induced it via terahertz cycling.  The amount of orientational correlation or anisotropy in a liquid solution can be measured using a form of spectroscopy named for this effect. The intensity of this effect can be found by adding a term proportional to the third order susceptibility to the linear susceptibility, then taking the square root of that quantity. Short pulses of light travelling in a medium become self-phase modulated due to this effect, which is also responsible for the shape of spatial (*) solitons. Tubes filled with nitrobenzene or nitrotoluene exhibit this effect quite strongly, and this effect is responsible for cancelling out diffraction in fiber propagation. This effect is heavily suppressed in media without inversion symmetry, and it operates at very high voltages, unlike the linear Pockels effect. For 10 points, name this effect in which the induced birefringence is equal to the square of the incident electric field.
The collapse and revival of a quantum state via this effect was observed by Schoelkopf et al, and Degert et al induced it via terahertz cycling.  
Kerr effect