Measuring a coherent superposition of multiple states

Autor:	N V Vitanov
Rok vydání:	2000
Předmět:	Physics Coupling Degenerate energy levels Elliptical polarization Condensed Matter Physics Laser Atomic and Molecular Physics and Optics law.invention Pulse (physics) Superposition principle law Excited state Quantum mechanics Energy level Physics::Atomic Physics Atomic physics
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 33:2333-2346
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/33/12/314
Popis:	A simple method for measuring the parameters of a completely or partially coherent superposition of multiple atomic states is proposed. The method, which can be applied in principle to a superposition of arbitrary energy states, is described in the case of a superposition of magnetic sublevels of a degenerate ground level. It is based upon coupling the sublevels involved in the superposition to the sublevels of a degenerate excited level by using a single elliptically polarized laser pulse. Such an interaction maps the parameters of the initial superposition onto the populations of the excited sublevels. By measuring the subsequent fluorescence from the excited sublevels for several suitably chosen laser polarizations one can deduce unambiguously the parameters of the initial superposition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::390486217d8cea7433df36a3d24b7d6d https://doi.org/10.1088/0953-4075/33/12/314 Zobrazit plný text záznamu