Hybrid teleportation via entangled coherent states in circuit quantum electrodynamics

TL;DR

This paper presents a deterministic method for teleporting unknown qubits using hybrid entangled states in superconducting circuits, enabling advanced quantum information processing with experimentally feasible techniques.

Contribution

It introduces a novel hybrid teleportation scheme combining discrete and continuous variables in circuit QED, with practical methods for minimizing distortions.

Findings

Teleportation of qubits via hybrid entangled states demonstrated.

Self-Kerr tunability reduces cavity state distortions.

Scheme is feasible with current superconducting circuit technology.

Abstract

We propose a deterministic scheme for teleporting an unknown qubit through continuous-variable entangled states in superconducting circuits. The qubit is a superconducting two-level system and the bipartite quantum channel is a photonic entangled coherent state between two cavities. A Bell-type measurement performed on the hybrid state of solid and photonic states brings a discrete-variable unknown electronic state to a continuous-variable photonic cat state in a cavity mode. This scheme further enables applications for quantum information processing in the same architecture of circuit-QED such as verification and error-detection schemes for entangled coherent states. Finally, a dynamical method of a self-Kerr tunability in a cavity state has been investigated for minimizing self-Kerr distortion and all essential ingredients are shown to be experimentally feasible with the state of the art superconducting circuits.