Efficient transfer of an arbitrary qutrit state in circuit QED

TL;DR

This paper proposes a fast, high-fidelity method for transferring arbitrary quantum states between two flux qutrits in circuit QED, utilizing resonant interactions and minimal operations, suitable for current technology.

Contribution

It introduces a simple, efficient scheme for quantum state transfer between qutrits in circuit QED, advancing quantum communication capabilities.

Findings

High-fidelity state transfer demonstrated in simulations

Method is compatible with current circuit-QED technology

Applicable to various solid-state qutrit systems

Abstract

Compared with a qubit, a qutrit (i.e., three-level quantum system) has a larger Hilbert space and thus can be used to encode more information in quantum information processing and communication. Here, we propose a scheme to transfer an arbitrary quantum state between two flux qutrits coupled to two resonators. This scheme is simple because it only requires two basic operations. The state-transfer operation can be performed fast because of using resonant interactions only. Numerical simulations show that high-fidelity transfer of quantum states between the two qutrits is feasible with current circuit-QED technology. This scheme is quite general and can be applied to accomplish the same task for other solid-state qutrits coupled to resonators.