Scalable quantum computing with Josephson charge qubits

TL;DR

This paper proposes a scalable quantum computing architecture using Josephson charge qubits, enabling efficient coupling and simplified gate operations to advance practical quantum information processing.

Contribution

It introduces a scalable quantum computing scheme with a novel coupling method and reduced two-bit operations for conditional gates using Josephson charge qubits.

Findings

Any two charge qubits can be effectively coupled via an accessible inductance.

The scheme requires only one two-bit operation for conditional gates.

The architecture addresses key scalability and connectivity challenges in quantum computing.

Abstract

A goal of quantum information technology is to control the quantum state of a system, including its preparation, manipulation, and measurement. However, scalability to many qubits and controlled connectivity between any selected qubits are two of the major stumbling blocks to achieve quantum computing (QC). Here we propose an experimental method, using Josephson charge qubits, to efficiently solve these two central problems. The proposed QC architecture is scalable since any two charge qubits can be effectively coupled by an experimentally accessible inductance. More importantly, we formulate an efficient and realizable QC scheme that requires only one (instead of two or more) two-bit operation to implement conditional gates.