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The work is a trapped-ion quantum network that uses two atomic species, with strontium handling photonic links and calcium storing the entanglement. The reported 4-qubit GHZ states and 10+ second memory lifetimes are meaningful, but the net generation rate of 39.3 Hz and the 1.24% success probability show the approach is still far from practical throughput. Readers should watch whether the mixed-species design scales to more nodes and longer distances.
University of Oxford Entangles Multi-Species Atom Network and Extends Memory Storage Beyond 10 Seconds
Physicists at the University of Oxford have developed a quantum network using different atomic elements, strontium and calcium, to create entangled states. They successfully generated up to 4-qubit Greenberger-Horne-Zeilinger (GHZ) states and stored this entanglement in calcium memory qubits for over 10 seconds. This significantly extends entanglement lifetimes, marking a major step forward for distributed quantum computing and sensing. The post University of Oxford Entangles Multi-Species Atom Network and Extends Memory Storage Beyond 10 Seconds appeared first on Quantum Computing Report.
Demonstration of the long-lived storage of remote entanglement. In a study published in Physical Review Letters, physicists at the University of Oxford have demonstrated a heterogeneous quantum network that generates multipartite entangled states across separate trapped-ion modules using two distinct…
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