In the following, some revolutions in the field of research and applications are highlighted
- The advent of laser opens up a new arena in many disciplines of science and technology.
- The power and precision of lasers have revolutionized the field of atomic physics and molecular physics.
For example, lasers have made possible entirely new technologies for isolating individual atoms in electromagnetic traps and cooling them to near absolute zero. This is known as Laser Atom Cooling.
The Nobel Prize in Physics 1997 was awarded jointly to Steven Chu, Claude Cohen-Tannoudji and William D. Phillips "for development of methods to cool and trap atoms with laser light".
Briefly, when the atoms are brought essentially to rest in the trap by using laser, they can undergo a quantum mechanical phase transition to form a superfluid.
This is known as a Bose-Einstein condensation, while remaining in the form of a dilute gas. This is a new state of matter where all the atoms are in the same coherent quantum state. As a consequence, the atoms lose their individual identities, and their quantum mechanical wavelike properties become dominant.
This coherent beam of atoms can be used to form an “atom laser” analogous to the coherent beam of photons in a conventional laser.
The potential of this future technology hopefully can be exploited for the fabrication of microelectronic and other nanoscale devices.
This can well be used for the development of quantum computer, the dream of many scientists. |