A new method for producing ultracold molecular ions

TL;DR

This paper introduces a novel method to produce ultracold molecular ions by sympathetic cooling with laser-cooled neutral atoms, enabling ground-state molecular ions for advanced scientific applications.

Contribution

The paper presents a new sympathetic cooling technique that efficiently cools both internal and external degrees of freedom of molecular ions to ultracold temperatures.

Findings

Proposes a method for ultracold molecular ion production

Achieves cooling of internal and external degrees of freedom

Potential applications in quantum chemistry and quantum computing

Abstract

We propose a new method for the production of ultracold molecular ions. This method utilizes sympathetic cooling due to the strong collisions between appropriately chosen molecular ions and laser-cooled neutral atoms to realize ultracold, internal ground-state molecular ions. In contrast to other experiments producing cold molecular ions, our proposed method efficiently cools both the internal and external molecular ion degrees of freedom. The availability of an ultracold, absolute ground-state sample of molecular ions would have broad impact to fields as diverse as quantum chemistry, astrophysics, and fundamental physics; and may lead to the development of a robust, scalable quantum computer.