Quantum computation with two-dimensional graphene quantum dots

TL;DR

This paper proposes using edge states of graphene nano sheets arranged in a Kagome lattice for quantum computation, introducing control schemes to mitigate decoherence and implement quantum gates.

Contribution

It introduces two bang-bang control schemes for quantum computation using graphene quantum dots, demonstrating their potential for effective gate operations.

Findings

Both control schemes contain significant quantum computational information.

Proposed gate operations are feasible on the graphene quantum dot array.

The schemes effectively combat decoherence in the system.

Abstract

We study an array of graphene nano sheets that form a two-dimensional S = 1/2 Kagome spin lattice used for quantum computation. The edge states of the graphene nano sheets are used to form quantum dots to confine electrons and perform the computation. We propose two schemes of bang-bang control to combat decoherence and realize gate operations on this array of quantum dots. It is shown that both schemes contain a great amount of information for quantum computation. The corresponding gate operations are also proposed.