aiqbench analysis
This arXiv preprint asks whether squeezed light can beat the classical limit for estimating satellite position from beam displacement across inter-satellite links. The authors report that the advantage shrinks with distance because of beam spreading and aperture truncation, but they expect it to hold out to roughly 100 km, a range relevant to Starlink-type constellations. For quantum-communication readers, the result is a theoretical feasibility estimate, not a demonstration, and its practical value depends on whether the advantage survives realistic losses and noise.
Quantum Advantage in Beam-Displacement Estimation for Inter-Satellite Quantum-Secure Time Transfer
arXiv:2610.41198v1 Announce Type: new Abstract: In this work, we investigate the practical feasibility of achieving a quantum advantage, in the context of inter-satellite quantum communication, of satellite position estimation. The investigation focuses on a quantum-enhanced scheme in which squeezing is added to the derivative mode of a Gaussian probe beam as a means of estimating photon-beam displacement. The performance of the scheme is compared against the standard quantum limit achieved by an optimal classical beam-displacement estimation scheme under a fair same-total-energy constraint. We find that although the benefit provided by squeezing rapidly diminishes as the inter-satellite distance increases due to diffraction-induced beam spreading and subsequent truncation by the finite receiver aperture, a quantum advantage can still be expected over inter-satellite distances up to approximately 100 km under practical satellite configurations. This distance scale between satellites is anticipated for Starlink-type satellite constellations.
Abstract:In this work, we investigate the practical feasibility of achieving a quantum advantage, in the context of inter-satellite quantum communication, of satellite position estimation. The investigation focuses on a quantum-enhanced scheme in which squeezing is added to the derivative mode of a Gaussian probe beam as a means of estimating photon-beam displacement. The performance of the scheme is compared against the standard quantum limit achieved by an optimal classical beam-displacement estimation scheme under a fair same-total-energy constraint. We find that although the benefit provided by squeezing rapidly diminishes as the inter-satellite distance increases due to diffraction-induced beam spreading and subsequent truncation by the finite receiver aperture, a quantum advantage can still be expected over inter-satellite distances up to approximately 100 km under practical satellite configurations. This distance scale between satellites is anticipated for Starlink-type satellite constellations.
15 pages, 3 figures. Comments are welcome
Quantum Physics (quant-ph); Optics (physics.optics)
arXiv:2610.41198 [quant-ph]
(or arXiv:2610.41198v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2610.41198 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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Full text under the publisher's open licence · 239 words