Autor(es)

de Lima, Emanuel Fernandes

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW A; v. 109, n. 1, p. 8-pg., 2024-01-18.

Resumo

We consider the formation of cold ground-state polar molecules in a low vibrational level by laser fields. Starting from a pair of cold colliding atoms of dissimilar species, we propose a strategy consisting of three steps. In the first step, a pump pulse induces the molecule formation by photoassociating the atomic pair in a high or intermediate vibrational level of an excited electronic molecular state. This step is followed by a dump pulse in an intermediate vibrational level of the ground state. The last step corresponds to the vibrational cooling or vibrational stabilization process. Taking advantage of the permanent dipole moment, an infrared chirped pulse induces downward transitions among the vibrational levels of the ground electronic state, reaching the ground vibrational level. We perform the strategy with with fixed-shaped pulses and also with an optimized chirped pulse for the stabilization step. To perform the optimization, we introduce an optimal control technique in which the optimization of the chirping is carried out in the time domain. This methodology has the benefit of limiting the pulse amplitude while focusing only on the frequency of the field. The proposed scheme is an alternative to the use of two pairs of pump-dump pulses or to the direct photoassociation and vibrational stabilization in the ground state. (AU)

• Processo FAPESP: 14/23648-9 - Controle quântico da matéria ultrafria
• Beneficiário: Emanuel Fernandes de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 23/04930-4 - Quantum Control of Light and Matter Gordon Research Conference Diversity and Synergetic in Quantum Control and Quantum Technology
• Beneficiário: Emanuel Fernandes de Lima
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior