Two-and three-qubit room-temperature graphene quantum gates

TL;DR

This paper proposes room-temperature graphene-based CNOT and Toffoli quantum gates utilizing ballistic transport and quantum interference, enabling scalable quantum computing with existing nanofabrication techniques.

Contribution

It introduces novel configurations for two- and three-qubit quantum gates in graphene, leveraging ballistic transport and interference at room temperature.

Findings

Gate configurations are feasible with current nanolithography.

Utilizes large mean-free-paths of carriers in graphene.

Operates effectively at room temperature.

Abstract

Proposed configurations for the implementation of graphene-based CNOT and Toffoli gates working at room temperature are presented. These two logic gates, essential for any quantum computing algorithm, involve ballistic Y junctions for qubit implementation, quantum interference for qubit interaction and oblique gates for optimizing the output, and can be fabricated using existing nanolitographical techniques. The proposed configurations of CNOT and Toffoli quantum logic gates are based on the very large mean-free-paths of carriers in graphene at room temperature.