|Title||Coherent Population Trapping in Two-Electron Three-Level Systems with Aligned Spins|
|Publication Type||Journal Article|
|Year of Publication||2001|
|Authors||Mompart, J, Corbalán, R, Roso, L|
|Journal||Phys. Rev. Lett.|
The possibility of coherent population trapping in two electron states with aligned spins (orthosystem) is evidenced. From the analysis of a three-level atomic system containing two electrons, and driven by the two laser fields needed for coherent population trapping, a conceptually new kind of dark state appears. The properties of this trapping are physically interpreted in terms of a dark hole, instead of a dark two-electron state. This technique, among many other applications, offers the possibility of measuring, with subnatural resolution, some superposition-state matrix elements of the electron-electron correlation that due to their time dependent nature are inaccessible by standard measuring procedures.