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Displacement-noise-free gravitational-wave detector using quantum tomography of photon orbital angular momentum states — arXiv:2610.21112

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.21112
License (as archived): CC0-1.0
Archived: 2026-10-16T10:49:23.442Z
SHA-256 of the archived text: 76945d7e1757e70a8b1c8532c847ff208f6b5487fbb3f9a8140abf6151db6ae1
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How to cite

Displacement-noise-free gravitational-wave detector using quantum tomography of photon orbital angular momentum states — arXiv:2610.21112 — arXiv (en), https://arxiv.org/abs/2610.21112 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_e55ccb494f4e (Metraipolis archive dc_e55ccb494f4e, sha256 76945d7e1757e70a8b1c8532c847ff208f6b5487fbb3f9a8140abf6151db6ae1)

BibTeX

@misc{dce55ccb494f4e,
  title = {Displacement-noise-free gravitational-wave detector using quantum tomography of photon orbital angular momentum states — arXiv:2610.21112},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.21112},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_e55ccb494f4e; sha256 76945d7e1757e70a8b1c8532c847ff208f6b5487fbb3f9a8140abf6151db6ae1},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.21112. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Gravitational waves (GWs) induce quantum transitions between photon orbital-angular-momentum (OAM) states with amplitudes $\alpha_{\pm}$. Exploiting this effect, we present a displacement-noise-free detection framework that extracts GW information from the OAM Hilbert space. Parametrized quantum state tomography of the GW-induced OAM sidebands enables a single V-shaped detector to resolve all seven wave parameters: the frequency, propagation direction, two polarization amplitudes, and initial phase of each polarization. Direct detection of the sidebands yields a weak signal of approximately $10^{-15}\,\mathrm{W}$. We therefore introduce a stronger reference state $r |0>_{\mathrm{P}}$, with $r=0.01$, to enhance the detected signal. For an arm length of $L=4\,\mathrm{m}$, $N=160$ round trips, a paraxial parameter of $\gamma=0.1$, an incident light power of $P_{\mathrm{BS}}=10\,\mathrm{kW}$, a wavelength of $\lambda_{\mathrm{opt}}=1064\,\mathrm{nm}$, and GW amplitudes of $A=10^{-18}$, we estimate sideband transition amplitudes of $|\alpha_{\pm}|\sim10^{-10}$ and signal powers of order $1\,\mathrm{nW}$, scaling as $P_{\mathrm{BS}}\alpha_{\pm}\propto P_{\mathrm{BS}}ANL\gamma/\lambda_{\mathrm{opt}}$. The shot-noise-limited sensitivity floor is $S^{1/2}_n=1.6\times10^{-20}\,\mathrm{Hz}^{-1/2}$. Because the scheme measures OAM transition amplitudes rather than differential arm lengths, it is intrinsically free from displacement noise and provides a broadband probe of GWs, specifically bridging the $0.1$--$10\,\mathrm{Hz}$ mid-frequency gap.

Tema degli esploratori: fisica e astronomia (elenco arXiv quant-ph, nuovi lavori del giorno).
Categorie arXiv: General Relativity and Quantum Cosmology (gr-qc) ; Instrumentation and Methods for Astrophysics (astro-ph.IM); Instrumentation and Detectors (physics.ins-det); Optics (physics.optics); Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2610.21112 — 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 2026-10-16T08:55:37.240Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).