Formation of deeply bound polar molecules combining pump-dump pulses with infrared radiation

Abstract

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. In the last step, an infrared chirped pulse induces downward transitions among the vibrational levels of the ground electronic state, reaching the ground vibrational level. Initially, the strategy is constructed with fixed-shaped pulses. Subsequently, we perform the calculations with optimized chirped pulses introducing an optimal control technique in which the optimization of the time-dependent frequency is carried out in the time domain. 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.

References in corpus (21)

• A High Phase-Space-Density Gas of Polar Molecules
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Ultracold dense gas of deeply bound heteronuclear molecules
• Stabilization of Ultracold Molecules Using Optimal Control Theory
• The X${}^1{\Sigma }^{+}$ and a${}^3{\Sigma }^{+}$ states of LiCs studied by Fourier-transform spectroscopy
• Bimolecular chemistry in the ultracold regime
• Making ultracold molecules in a two color pump-dump photoassociation scheme using chirped pulses
• Coherent Control of Bond Making
• Formation of ultracold molecules by merging optical tweezers
• Field-linked resonances of polar molecules
• Quantum control of molecules for fundamental physics
• Vibrational stabilization of ultracold KRb molecules. A comparative study
• Formation of deeply bound molecules via chainwise adiabatic passage
• Analyzing Feshbach resonances -- A ${}^6$Li -${}^{133}$Cs case study
• Prospects for making polar molecules with microwave fields
• Laser control of ultracold molecule formation: The case of RbSr
• Efficient Pathway to NaCs Ground State Molecules
• Intercombination line photoassociation spectroscopy of ${}^{87}$Rb${}^{170}$Yb
• Vibrational ladder-descending photostabilization of a weakly bound molecule: Quantum optimal control with a genetic algorithm

Cited by in corpus (1)

• Introduction to Theoretical and Experimental aspects of Quantum Optimal Control