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Remote state preparation of a single-spin state via hybrid spin-photon entanglement — arXiv:2610.00832

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.00832
License (as archived): CC0-1.0
Archived: 2026-10-07T11:37:28.212Z
SHA-256 of the archived text: 6b507f8206c4fda39b1a362d9f195ddd2cb04c5a52378225527c97206d20436a
Stable URL of this page: https://metraipolis.com/documento/dc_03dbdd0ebd50

How to cite

Remote state preparation of a single-spin state via hybrid spin-photon entanglement — arXiv:2610.00832 — arXiv (en), https://arxiv.org/abs/2610.00832 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_03dbdd0ebd50 (Metraipolis archive dc_03dbdd0ebd50, sha256 6b507f8206c4fda39b1a362d9f195ddd2cb04c5a52378225527c97206d20436a)

BibTeX

@misc{dc03dbdd0ebd50,
  title = {Remote state preparation of a single-spin state via hybrid spin-photon entanglement — arXiv:2610.00832},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.00832},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_03dbdd0ebd50; sha256 6b507f8206c4fda39b1a362d9f195ddd2cb04c5a52378225527c97206d20436a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.00832. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Remote state preparation is a fundamental quantum-information protocol that exploits prior knowledge of a target state to reduce the communication resources required for quantum-state distribution. Here, we propose a remote-state-preparation protocol for a stationary electron-spin qubit using hybrid entanglement between the electron spin and a coherent-state light pulse, generated by spin-dependent reflection from a spin-cavity system. Unlike single-photon encodings, the coherent-state encoding is naturally tolerant of photon loss: a loss channel attenuates the coherent-state amplitude, leading to a gradual reduction in preparation fidelity rather than probabilistic protocol failure. The central difficulty---implementing the projection onto superpositions of nonorthogonal coherent states required in the conventional protocol---is circumvented by coupling the transmitted pulse to an auxiliary spin, followed by homodyne detection and a spin projective measurement. The protocol therefore avoids direct coherent-state-superposition measurements and photon-number-resolving detection. In the ideal limit, deterministic preparation of a particular class of target states can be achieved using only one bit of classical communication. We analytically quantify the effects of coherent-state nonorthogonality, fiber loss, and spin dephasing on the preparation fidelity. Increasing the coherent-state amplitude improves state distinguishability and hence the preparation fidelity, but also enhances which-branch information leakage caused by photon loss, resulting in an optimal amplitude at each transmission distance. For experimentally relevant parameters, the optimized average fidelity remains well above the classical benchmark over distances of tens of kilometers. We also discuss a possible implementation using diamond nitrogen-vacancy centers.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-10-02 in quant-ph).
Categorie arXiv: Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2610.00832 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-07T11:19:01.657Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-10-02?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).