Spatial and spectral properties of a photon echo

Aleksey I. Alekseev, I. V. Evseev

В. А. Зуйков, В. В. Самарцев

S. A. Moiseev, M. I. Noskov

The novel variants of the photon echo technique for the storage and complete reconstruction of the quantum states of one and two photon fields are theoretically investigated. Such new possible schemes are proposed for two types of three-level macroscopic coherent media, where the specific spectral and temporal properties of the quantum dynamics are analyzed. Special physical analysis is devoted to the complete reconstruction of the mapped quantum states at the multipulse restoring, its spatial, temporal and spectral properties. The specific possibilities of the proposed schemes for the quantum computations are also discussed. (Summary only available)

Cheng Li, Xiangyang Yu

B. Luo, Ulf Elman, Stefan Kröll +1 more

Optical memories based on spectral hole burning (SHB) and stimulated photon echoes (SPE) are attracting much attention. Both approaches add an extra dimension for addressing (frequency and temporal dimension respectively) to the spatial dimensions. With these concepts the storage density can become 103 – 106 times higher than in conventional optical memories. In both approaches, the ratio of the inhomogeneous line width to the homogeneous line width of the ions activated in the storage process determines the improvement in storage density. Compared to the SHB approach, SPE has certain advantages including high R/W rate and ability to process the stored (spatial as well we temporal) information. Using SPE, the authors have experimentally realised the AND, OR and NOT logical operations [1,2]. Further all optical processing, such as temporal pattern recognition, can be done using SPE.

T. V. Smirnova, Olga M. Fedotova, Oleg Kh Khasanov