3D Projection Sideband Cooling

TL;DR

This paper presents a novel 3D microwave projection sideband cooling method for neutral atoms, achieving high ground-state cooling efficiency with minimal spontaneous emission in a 3D optical lattice.

Contribution

It introduces a new 3D cooling technique using state-dependent potentials and microwave photons, effective even for weakly bound atoms.

Findings

76% of atoms cooled to 3D vibrational ground state

Cooling sequence minimizes spontaneous emission

Effective in site-resolvable 3D optical lattice

Abstract

We demonstrate 3D microwave projection sideband cooling of trapped, neutral atoms. The technique employs state-dependent potentials that enable microwave photons to drive vibration-number reducing transitions. The particular cooling sequence we employ uses minimal spontaneous emission, and works even for relatively weakly bound atoms. We cool 76% of atoms to their 3D vibrational ground states in a site-resolvable 3D optical lattice.