# Charge qubit in van der Waals heterostructures

## TL;DR

This paper proposes a charge qubit using spatial electron superpositions in van der Waals heterostructures, demonstrating its feasibility with ab initio calculations for ZrSe2/SnSe2, highlighting robustness and high-temperature operation.

## Contribution

It introduces a novel charge qubit scheme in vdW heterostructures, supported by theoretical calculations, advancing quantum computing hardware in 2D materials.

## Key findings

- Qubit can be prepared, manipulated, and measured using electric fields and currents.
- The proposed qubit operates robustly at high temperatures.
- The scheme is compatible with existing 2D material technology.

## Abstract

The use of spatial quantum superpositions of electron states in a gated vdW heterostructure as a charge qubit is presented. We theoretically demonstrate the concept for the ZrSe$_2$/SnSe$_2$ vdW heterostructure using rigorous ab initio calculations. In the proposed scheme, the quantum state is prepared by applying a vertical electric field, is manipulated by short field pulses, and is measured via electric currents. The qubit is robust, operational at high temperature, and compatible with the current 2D technology. The results open up new avenues for the field of physical implementation of qubits.