Three-level echo in gaseous media

Nail Akhmediev, Igor V. Mel’nikov

L. A. Nefedev

Sergey A. Moiseev

A new variant of realization of quantum memory based on the use of a photon echo in an optically dense three-level gaseous medium is proposed. The use of a long-lived highly excited optical level as a storage of quantum information is the characteristic feature of the scheme proposed. This scheme of quantum memory is distinguished by reduced optical noises owing to the possibility of realizing temporal, spectral, and spatial selection of weak quantum radiation relative to the accompanying laser pulsed fields.

Marlan O. Scully, M. J. Stephen, David C. Burnham

Optical echos in gaseous media are investigated in order to determine the conditions under which an echo would be expected. The results are similar to those for a solid, except that the time between exciting pulses is limited when the two pulses do not travel in the same direction. With increasing pulse separation collisions reduce the echo intensity in a way which is characteristic of the type of collision process.

Mikhail S. Gitlin, Л. А. Островский

Jamal T. Manassah, Barry M. Gross