Coherent control
Encyclopedia
Coherent control is a quantum mechanical based method for controlling dynamical processes with light
Light
Light or visible light is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Visible light has wavelength in a range from about 380 nanometres to about 740 nm, with a frequency range of about 405 THz to 790 THz...

, employing quantum interference phenomena which are controlled by shaping the phase of laser
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation...

 pulses. A detailed discussion of this approach can be
found in the book Principles of the Quantum Control of Molecular Processes, by Moshe Shapiro
Moshe Shapiro
Moshe Shapiro is a chemist and physicist at the University of British Columbia.-Current research:Shapiro's research focuses on coherent control, laser catalysis, quantum computing, transition state spectroscopy, quantum mechanics, and others areas....

 and P. Brumer, (Wiley, New York, 2003).

Using this method it is already possible to control many processes, such as the direction of motion of electrons in semiconductors, the breaking of chemical bonds and the absorption of light.
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