Deterministic generation of high-dimensional entanglement between distant atomic memories via multi-photon exchange

TL;DR

This paper presents a feasible protocol for deterministically generating high-dimensional entanglement between distant atomic memories, advancing quantum network capabilities by enabling high-capacity, noise-resilient quantum communication.

Contribution

It introduces a novel, experimentally feasible method for creating high-dimensional entanglement between remote atoms using two-photon wavepackets and laser control.

Findings

Deterministic three-dimensional entanglement between distant atoms achieved.

Efficient transfer of atomic states enables a three-dimensional quantum repeater.

Entanglement verification via simple measurement of atomic ground states.

Abstract

Promising access to high-speed quantum networks relies on the creation of high-dimensional entangled memories that provide quantum communication with higher capacity of noisy quantum channels, thereby reducing the transmission time of information. Yet, the distribution of multidimensional entanglement between remote memory nodes is still faintly investigated. We propose an experimentally feasible protocol of deterministic generation of high-dimensional entanglement between distant multi-level atoms confined in high-finesse optical cavities and driven by laser pulses. Three-dimensional entanglement is generated deterministically between remote atoms by triggering a two-photon wavepacket, which mediates a superposition of states chosen by the laser pulse parameters. The efficient transfer of atomic states between remote nodes allows the construction of a three-dimensional quantum repeater, where the successful creation of entanglement can be verified by a simple method for reliable measurement of atomic ground Zeeman states.