Scalable Neutral Atom Quantum Computer with Interaction on Demand

TL;DR

This paper proposes a scalable neutral atom quantum computer architecture that enables on-demand interactions between atom qubits using optical traps and controlled collisions, leveraging existing cold atom and nanotechnology techniques.

Contribution

It introduces a novel approach for scalable quantum computing with neutral atoms, utilizing controlled collisions and optical trapping for on-demand interactions.

Findings

Feasible with current cold atom and nanotech technology

Uses optical traps for scalable qubit arrangement

Employs controlled collisions for two-qubit gates

Abstract

We propose a scalable neutral atom quantum computer with an on-demand interaction. Artificial lattice of near field optical traps is employed to trap atom qubits. Interactions between atoms can be turned off if the atoms are separated by a high enough potential barrier so that the size of the atomic wave function is much less than the interatomic distance. One-qubit gate operation is implemented by a gate control laser beam which is attached to an individual atom. Two-qubit gate operation between a particular pair of atoms is introduced by leaving these atoms in an optical lattice and making them collide so that a particular two-qubit state acquires a dynamical phase. Our proposal is feasible within existing technology developed in cold atom gas, MEMS, nanolithography, and various areas in optics.