Cooling toolbox for atoms in optical lattices

TL;DR

This paper introduces new cooling schemes for atoms in optical lattices, utilizing algorithmic cooling and filtering techniques to approach the ground state and create defect-free quantum registers.

Contribution

It presents novel cooling protocols based on algorithmic cooling and filtering, with practical implementation strategies for optical lattice systems.

Findings

Protocols effectively cool atoms near the ground state

Filtering methods can be operated continuously

Algorithms create defect-free quantum registers

Abstract

We propose and analyze several schemes for cooling bosonic and fermionic atoms in an optical lattice potential close to the ground state of the no-tunnelling regime. Some of the protocols rely on the concept of algorithmic cooling, which combines occupation number filtering with ideas from ensemble quantum computation. We also design algorithms that create an ensemble of defect-free quantum registers. We study the efficiency of our protocols for realistic temperatures and in the presence of a harmonic confinement. We also propose an incoherent physical implementation of filtering which can be operated in a continuous way.