Quantum network of neutral atom clocks

TL;DR

This paper proposes a protocol to create a fully entangled GHZ state across spatially separated neutral atom clocks using Rydberg interactions and photon channels, enabling a quantum clock network with potential for enhanced precision.

Contribution

It introduces a novel scheme combining Rydberg interactions and photon-mediated entanglement for neutral atom clock networks, advancing quantum communication and synchronization capabilities.

Findings

Protocol for GHZ state creation in neutral atom clocks

Analysis of implementation with Yb ensembles

Potential for scalable quantum clock networks

Abstract

We propose a protocol for creating a fully entangled GHZ-type state of neutral atoms in spatially separated optical atomic clocks. In our scheme, local operations make use of the strong dipole-dipole interaction between Rydberg excitations, which give rise to fast and reliable quantum operations involving all atoms in the ensemble. The necessary entanglement between distant ensembles is mediated by single-photon quantum channels and collectively enhanced light-matter couplings. These techniques can be used to create the recently proposed quantum clock network based on neutral atom optical clocks. We specifically analyze a possible realization of this scheme using neutral Yb ensembles.