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Preparation and control of aligned cyclic rotational states

AutorOrtigoso, Juan ; Fernández Torre, Delia ; Santos, Julio
Palabras claveElectric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility
Coherent control of atomic interactions with photons
Other multiphoton processes
Fecha de publicación2013
EditorAmerican Physical Society
CitaciónPHYSICAL REVIEW A 88 (2013)
ResumenMolecules in selected rotational states can remain well aligned for extended periods of time in the presence of an appropriate periodic train of nonresonant laser pulses. Here, we show that these states can be prepared by slowly switching the electromagnetic field amplitude during a sequence of laser pulses. For low-temperature ensembles, a high degree of alignment can be achieved by designing pulse trains that take into account the distribution of avoided crossings between quasienergy curves. Additionally, we present calculations that illustrate several effects causing misalignment. A discussion of subtleties concerning systems with unbounded rotational spectra is also included. © 2013 American Physical Society.
URIhttp://hdl.handle.net/10261/89399
DOI10.1103/PhysRevA.88.033418
Identificadoresdoi: 10.1103/PhysRevA.88.033418
issn: 1050-2947
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