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- W4320836722 abstract "Multipartite entangled states are an essential resource for sensing, quantum error correction, and cryptography. Color centers in solids are one of the leading platforms for quantum networking due to the availability of a nuclear spin memory that can be entangled with the optically active electronic spin through dynamical decoupling sequences. Creating electron-nuclear entangled states in these systems is a difficult task as the always-on hyperfine interactions prohibit complete isolation of the target dynamics from the unwanted spin bath. While this emergent cross-talk can be alleviated by prolonging the entanglement generation, the gate durations quickly exceed coherence times. Here we show how to prepare high-quality GHZ$_M$-like states of up to $M=10$ qubits, with minimal cross-talk. We introduce the $M$-way entangling power of an evolution operator, which allows us to verify genuine all-way correlations. We show how to use sequential or single-shot entangling operations to prepare GHZ$_M$-like states within time constraints that saturate bounds on $M$-way correlations. Finally, we study the entanglement of mixed electron-nuclear states and develop a non-unitary $M$-way entangling power which additionally captures correlations arising from all spectator nuclear spins." @default.
- W4320836722 created "2023-02-15" @default.
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- W4320836722 creator A5048551648 @default.
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- W4320836722 date "2023-02-10" @default.
- W4320836722 modified "2023-09-25" @default.
- W4320836722 title "Generation of genuine all-way entanglement in defect-nuclear spin systems through dynamical decoupling sequences" @default.
- W4320836722 doi "https://doi.org/10.48550/arxiv.2302.05580" @default.
- W4320836722 hasPublicationYear "2023" @default.
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