2-dimensional semiconductors pave the way towards dopant based quantum computing

TL;DR

This paper explores the potential of 2D semiconductors as hosts for dopant-based quantum computing, addressing atomic-scale dopant control issues and assessing their feasibility for qubit implementation.

Contribution

It proposes using 2D materials to overcome dopant placement challenges and evaluates their suitability for quantum computing applications.

Findings

2D materials can tightly bind dopants, facilitating manipulation.

Many 2D materials are comparable to bulk hosts for donor qubits.

Feasibility of dopant control in 2D systems is promising.

Abstract

Since the 1998 proposal to build a quantum computer using dopants in semiconductors as qubits, much progress has been achieved on semiconductors nano fabrication and control of charge and spins in single dopants. However, an important problem remains, which is the control at the atomic scale of the dopants positioning. We propose to circumvent this problem by using 2 dimensional materials as hosts. Since the first isolation of graphene in 2004, the number of new 2D materials with favorable properties for electronics has been growing. Dopants in 2 dimensional systems are more tightly bound and potentially easier to position and manipulate. Considering the properties of currently available 2D materials, we access the feasibility of such proposal in terms of the manipulability of isolated dopants (for single qubit operations) and dopant pairs (for two qubit operations). Our results indicate that a wide variety of 2D materials may perform at least as well as the currently studied bulk host for donor qubits.