Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation

Abstract

We report the observation of microwave coherent control of rotational states of ultracold 85Rb133Cs molecules formed in their vibronic ground state by short-range photoassociation.

Coherent manipulation of the internal state of ultracold 87Rb133Cs molecules with multiple microwave fields

“…Furthermore, it has recently been proposed that the rotational states of polar molecules may be used to engineer fully controllable synthetic dimensions to experiments [61,62]. With these applications in mind, a number of groups, including our own, continue to develop the necessary techniques to coherently control and fully exploit the internal degrees of freedom of molecules [16,[63][64][65][66].…”

Quantum control of molecules for fundamental physics

“…This observation was applied to extend the rotational coherence times in ultracold bulk gases of KRb [137] and NaK with a modest applied electric field to decouple the nuclear spins from rotational motion [138]. Related experiments involving high resolution microwave spectroscopy or coherent Rabi flopping have also been performed in RbCs [6,[139][140][141]. Alternatively, instead of controlling polarization and applied static fields, the differential lightshift can be eliminated by engineering magic wavelength optical traps similar to those demonstrated for Sr 2 [111,112].…”

Entanglement Generation of Polar Molecules via Deep Reinforcement Learning

“…For example, a recent theoretical study proposed a general protocol for generating long-lived entangled cluster states using electric dipolar interactions, where the qubits are encoded into nuclear spin-rotational states of polar molecules . On the other hand, numerous experiments on laser cooling and magneto-optical trapping for polar molecules such as CaF, SrF, and YO have been successfully demonstrated in recent years, − paving the way toward the quantum processor built with ultracold molecules.…”