Proposal for a Laser Control of Vibrational Cooling in Na-2 Using Resonance Coalescence
Abbreviated Journal Title
Phys. Rev. Lett.
GROUND-STATE MOLECULES; PULSES; IONS; GAS; Physics, Multidisciplinary
With a specific choice of laser parameters resulting in a so-called exceptional point (EP) in the wavelength-intensity parameter plane, it is possible to produce the coalescence of two Floquet resonances describing the photodissociation of the Na-2 molecule, which is one of the candidates for the formation of samples of translationally cold molecules. By appropriately tuning laser parameters along a contour encircling the exceptional point, the resonances exchange their quantum nature. Thus a laser-controlled transfer of the probability density from one field-free vibrational level to another is achieved through adiabatic transport involving these resonances. We propose an efficient scenario for vibrational cooling of Na-2 referring to cascade transfers involving multiple EPs and predicted to be robust up to a 78% rate against laser-induced dissociation.
Physical Review Letters
"Proposal for a Laser Control of Vibrational Cooling in Na-2 Using Resonance Coalescence" (2011). Faculty Bibliography 2010s. 1072.