Ultrafast Coherent Coupling of Atomic Hyperfine and Photon Frequency Qubits

TL;DR

This paper demonstrates ultrafast coherent coupling between atomic hyperfine qubits in a trapped ion and photonic frequency qubits, advancing quantum networking and ultrafast quantum gate implementation.

Contribution

It introduces a method for ultrafast coherent coupling between atomic and photonic qubits, enabling faster quantum information processing and networking.

Findings

Successful demonstration of ultrafast coupling

Potential for entangling remote ions via photon interference

Facilitates ultrafast quantum gate operations

Abstract

We demonstrate ultrafast coherent coupling between an atomic qubit stored in a single trapped cadmium ion and a photonic qubit represented by two resolved frequencies of a photon. Such ultrafast coupling is crucial for entangling networks of remotely-located trapped ions through photon interference, and is also a key component for realizing ultrafast quantum gates between Coulomb-coupled ions.