English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We propose a quantum repeater architecture that can operate withoutcryogenics. Each node in our architecture builds on a cell of hot alkali atomsand noble-gas spins which offer a storage time as long as a few hours. Such acell of hybrid gases is placed in a ring cavity, which allows us to suppressthe detrimental four-wave mixing (FWM) noise in the system. We investigate theprotocol based on a single-photon source made of an ensemble of the same hotalkali atoms. A single photon emitted from the source is either stored in thememory or transmitted to the central station to be detected. We quantify thefidelity and success probability of generating entanglement between two remoteensembles of noble-gas spins by taking into account finite memory efficiency,channel loss, and dark counts in detectors. We describe how the entanglementcan be extended to long distances via entanglement swapping operations byretrieving the stored signal. Moreover, we quantify the performance of thisproposed repeater architecture in terms of repeater rates and overallentanglement fidelities and compare it to another recently proposednon-cryogenic quantum repeater architecture based on nitrogen-vacancy (NV)centers and optomechanical spin-photon interfaces. As the system requires arelatively simple setup, it is much easier to perform multiplexing, whichenables achieving rates comparable to the rates of repeaters with NV centersand optomechanics, while the overall entanglement fidelities of the presentscheme are higher than the fidelities of the previous scheme. Our work showsthat a scalable long-distance quantum network made of hot hybrid atomic gasesis within reach of current technological capabilities.

Proposal for non-cryogenic quantum repeaters with hot hybrid alkali-noble gases