Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory

TL;DR

This paper demonstrates a coherent quantum interface between on-demand single photons from a quantum dot and a rubidium atomic ensemble, advancing the development of fast quantum networks.

Contribution

It presents the first coherent exchange between quantum dot photons and atomic quantum memory, enabling rapid quantum interconnections.

Findings

Successful mapping of photon electric field to atomic coherence

Demonstration of fast quantum light-matter interaction

Insights into short-time scale quantum network building

Abstract

Long-range quantum communication requires the development of in-out light-matter interfaces to achieve a quantum advantage in entanglement distribution. Ideally, these quantum interconnections should be as fast as possible to achieve high-rate entangled qubits distribution. Here, we demonstrate the coherent quanta exchange between single photons generated on-demand from a GaAs quantum dot and atomic ensemble in a $^{87}$Rb vapor quantum memory. Through an open quantum system analysis, we demonstrate the mapping between the quantized electric field of photons and the coherence of the atomic ensemble. Our results play a pivotal role in understanding quantum light-matter interactions at the short time scales required to build fast hybrid quantum networks.