Controlling the dynamics of ultracold polar molecules in optical tweezers

Abstract

Ultracold molecules trapped in optical tweezers show great promise for the implementation of quantum technologies and precision measurements. We study a prototypical scenario where two interacting polar molecules placed in separate traps are controlled using an external electric field. This, for instance, enables a quantum computing scheme in which the rotational structure is used to encode the qubit states. We estimate the typical operation timescales needed for state engineering to be in the range of few microseconds. We further underline the important role of the spatial structure of the two-body states, with the potential for significant gate speedup employing trap-induced resonances.

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

“…While trapped neutral and ionic atoms continue to be at the forefront of experimental quantum technologies, trapped molecules may eventually emerge as a platform offering more versatility. An example testifying to their versatility is the use of trap-induced resonances to implement two-qubit gates with shaped electric fields for ultracold molecules trapped in optical tweezers [539].…”

Quantum simulation of the central spin model with a Rydberg atom and polar molecules in optical tweezers

“…Note that, if harmonic trapping frequencies ∼ 2π × 10 4 Hz are used in our setup, the resulting trap excitation energies are small in comparison with the example atom-molecule interaction strength ∼ 2π × 10 5 Hz. As a result, the dipolar interactions can cause excitations of higher trap states [110]. If interparticle distances are small in comparison with the extent of the particle wave functions, then the trap excitations can in turn significantly affect the interaction strength and cannot be kept out of the analysis.…”

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

“…While trapped neutral and ionic atoms continue to be at the forefront of experimental quantum technologies, trapped molecules may eventually emerge as a platform offering more versatility. An example testifying to their versatility is the use of trap-induced resonances to implement two-qubit gates with shaped electric fields for ultracold molecules trapped in optical tweezers [533].…”