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Spin-Graviton-Spin: a unique probe of quantum gravity — arXiv:2608.28901

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.28901
License (as archived): CC0-1.0
Archived: 2026-10-17T10:15:11.279Z
SHA-256 of the archived text: e2f1d1fc9a20ac13e31921c965cb12fe676e4f7a982683f717c193b3ea8c1044
Stable URL of this page: https://metraipolis.com/documento/dc_be75ca97dbe7

How to cite

Spin-Graviton-Spin: a unique probe of quantum gravity — arXiv:2608.28901 — arXiv (en), https://arxiv.org/abs/2608.28901 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_be75ca97dbe7 (Metraipolis archive dc_be75ca97dbe7, sha256 e2f1d1fc9a20ac13e31921c965cb12fe676e4f7a982683f717c193b3ea8c1044)

BibTeX

@misc{dcbe75ca97dbe7,
  title = {Spin-Graviton-Spin: a unique probe of quantum gravity — arXiv:2608.28901},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.28901},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_be75ca97dbe7; sha256 e2f1d1fc9a20ac13e31921c965cb12fe676e4f7a982683f717c193b3ea8c1044},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.28901. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The existence of quantum gravity is the most important question in theoretical physics. Besides the theoretical development in this direction, looking for its low-energy consequences can provide clues. However, besides availability, it is crucial to ensure that what is observed uniquely comes from quantum gravity and not from other forces in the environment. What is the unique feature of gravity? The spin-$2$ nature of its propagator. In this Letter, we calculate what the unique feature of the spin-$2$ graviton is in the interaction of two spin-$\frac{1}{2}$ particles. This unique feature shows itself in intertwining the spin and momentum of two particles simultaneously as a dipole-dipole interaction. This cannot happen for any spin-$0$ or spin-$1$ propagator, at least at leading order, which scales as $\frac{1}{r^3}$ in real space. We re-calculate the results using an independent approach, i.e., the Foldy-Wouthuysen transformation, and reach the same results. Due to simultaneous coupling of both particles' spins and momenta, a four-partite entanglement framework is suggested to observe this effect.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-01 in quant-ph).
Categorie arXiv: General Relativity and Quantum Cosmology (gr-qc) ; High Energy Physics - Theory (hep-th); Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2608.28901 — 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 2026-10-17T10:03:37.639Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-01?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).