Coherent population trapping in two-electron three-level systems with aligned spins

Details Coherent population trapping in two-electron three-level systems with aligned spins Coherent population trapping in two-electron three-level systems with aligned spins

2001-07-25

arxiv.org/abs/quant-ph/0107126v1

Physics

Quantum Physics

10 pages and 4 figures

Scientific paper

10.1103/PhysRevLett.88.023603

The possibility of coherent population trapping in two electron states with aligned spins (ortho-system) 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 two-electron dark state appears. The properties of this trapping are studied and 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 inaccesible by standard measuring procedures.

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