Implementation of controlled multi-qudit operations for a solid-state quantum computer based on charge qudits

TL;DR

This paper proposes a method to implement controllable multi-qudit interactions in a solid-state quantum computer using charge qudits and auxiliary states, enabling switchable entangling operations.

Contribution

It introduces a practical architecture for charge-based qudit quantum computers with a mechanism for controllable entangling interactions via auxiliary states.

Findings

Mechanism for controllable qudit-qudit interactions using auxiliary states

Analysis of the Hilbert space dimension for the proposed architecture

Potential for scalable solid-state quantum computing with charge qudits

Abstract

We consider a mechanism to generate controllable qudit-qudit interactions in a charge-position paradigm for a quantum computer, through the use of auxiliary states. By controlling the tunneling rates onto these auxiliaries from the qudits proper, we can controllably switch the entangling operations. We consider a practical architecture in which to realize such a computer and examine the associated Hilbert space dimension.