Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1705.05389 · Journal of Modern Optics

Entanglement-enabled interferometry using telescopic arrays

Siddhartha Santra, Brian T. Kirby, Vladimir S. Malinovsky, Michael Brodsky

Published Sep 5, 2018• 6 citations
arXivHTMLPDF

Abstract

A protocol of measuring interferometric visibility function using imperfectly entangled states shared between remote telescopes is proposed. We demonstrate how quantum entanglement can be utilized to increase the baseline size of telescopic arrays thereby providing substantial enhancement to the resolution of direct-detection interferometric measurements. We demonstrate, through a comprehensive analysis, how errors in visibility measurements and in the intensity distribution of a distant object show dependence on the entanglement degree of the shared quantum resource. We analyse the feasibility of the protocol using currently available technology and identify the nature of sources that can benefit most from it.

DOI
10.1080/09500340.2018.1511864

Related papers

Quantum-scheme for improving interferometric visibility with imperfect distributed entangled-states

Siddhartha Santra, Brian T. Kirby, Vladimir S. Malinovsky +1 more

We analyze a quantum-scheme for measuring interferometric visibility for telescopic applications with imperfectly entangled states as a resource. The scheme overcomes photon loss thus permitting measurement with larger baseline leading to finer resolution of angular intensity distribution of remote sources of light.

IEEE/LEOS Summer Topical Meetings•Jul 1, 2017•0 citations

Higher-resolution imaging of distant sources using imperfect quantum resources.

Siddhartha Santra, Brian T. Kirby, Alejandra Maldonado-Trapp +1 more

We show how the baseline size between telescopes, that determines the angular resolution, used in optical interferometric arrays can be increased by using a shared, possibly non-maximally-entangled, quantum state. We analyse how the rate of entagled-state production in the quantum repeater network needs to scale with the baseline size while maintaining interferometric sensitivity.

Quantum Information and Measurement (QIM)•Jan 1, 2017•1 citation

Entanglement enabled synthetic aperture in decohering environments

Siddhartha Santra, Brian T. Kirby, Vladimir S. Malinovsky +1 more

We propose a protocol for synthesizing large apertures in interferometry using imperfectly entangled quantum states shared between remote telescopes. The protocol implementation is feasible in practical environments and can provide high-resolution images of distant sources.

Frontiers in Optics•Jan 1, 2017•1 citation

Quantum entanglement as a tool to image distant astronomical objects

Particles entangled over long distances can, in theory, improve the sensitivity of long-baseline interferometers that are observing weak thermal light sources. A proof-of-concept experiment now demonstrates entanglement-assisted interferometry, paving the way for entanglement-enhanced non‑local sensing techniques. The resolution of telescope arrays detecting faint light signals could be improved using a quantum trick.

Nature•Mar 11, 2026•0 citations

Practical approach to extending baselines of telescopes using continuous-variable quantum information

Bran Purvis, Randy Lafler, R Nicholas Lanning

Abstract Interferometric telescopes are instrumental for the imaging of distant astronomical bodies, but optical loss heavily restricts how far telescopes in an array can be placed from one another, leading to a bottleneck in the resolution that can be achieved. An entanglement-assisted approach to this problem has been proposed by (Gottesman et al 2011 Phys. Rev. Lett. 109 070503), as a possible solution to the issue of optical loss if the entangled state can be distributed across long distances by employing a quantum repeater network. In this paper, we propose an alternative entanglement-assisted scheme that interferes a two-mode squeezed vacuum state with the astronomical state and then measures the resulting state by means of homodyne detection. We use a continuous-variable approach and compute the Fisher information with respect to the mutual coherence of the astronomical source. We show that when the Fisher information is observed cumulatively at the rate at which successful measurements can be performed, our proposed scheme does not outperform the traditional direct detection approach or the entanglement-assisted approach of GJC12.

arXiv:2403.03491•New Journal of Physics•Sep 20, 2024•3 citations

Interferometric Imaging Using Shared Quantum Entanglement

Matthew R. Brown, Markus Allgaier, Valérian Thiel +3 more

Quantum entanglement-based imaging promises significantly increased resolution by extending the spatial separation of optical collection apertures used in very-long-baseline interferometry for astronomy and geodesy. We report a tabletop entanglement-based interferometric imaging technique that utilizes two entangled field modes serving as a phase reference between two apertures. The spatial distribution of a simulated thermal light source is determined by interfering light collected at each aperture with one of the entangled fields and performing joint measurements. This experiment demonstrates the ability of entanglement to implement interferometric imaging.

arXiv:2212.07395•Physical Review Letters•Nov 21, 2023•35 citations
A protocol of measuring interferometric visibility function using imperfectly entangled states shared between remote telescopes is proposed. We demonstrate how quantum entanglement can be utilized to increase the baseline size of telescopic arrays thereby providing substantial enhancement to the resolution of direct-detection interferometric measurements. We demonstrate, through a comprehensive analysis, how errors in visibility measurements and in the intensity distribution of a distant object show dependence on the entanglement degree of the shared quantum resource. We analyse the feasibility of the protocol using currently available technology and identify the nature of sources that can benefit most from it.
Abstract Interferometric telescopes are instrumental for the imaging of distant astronomical bodies, but optical loss heavily restricts how far telescopes in an array can be placed from one another, leading to a bottleneck in the resolution that can be achieved. An entanglement-assisted approach to this problem has been proposed by (Gottesman et al 2011 Phys. Rev. Lett. 109 070503), as a possible solution to the issue of optical loss if the entangled state can be distributed across long distances by employing a quantum repeater network. In this paper, we propose an alternative entanglement-assisted scheme that interferes a two-mode squeezed vacuum state with the astronomical state and then measures the resulting state by means of homodyne detection. We use a continuous-variable approach and compute the Fisher information with respect to the mutual coherence of the astronomical source. We show that when the Fisher information is observed cumulatively at the rate at which successful measurements can be performed, our proposed scheme does not outperform the traditional direct detection approach or the entanglement-assisted approach of GJC12.
Quantum entanglement-based imaging promises significantly increased resolution by extending the spatial separation of optical collection apertures used in very-long-baseline interferometry for astronomy and geodesy. We report a tabletop entanglement-based interferometric imaging technique that utilizes two entangled field modes serving as a phase reference between two apertures. The spatial distribution of a simulated thermal light source is determined by interfering light collected at each aperture with one of the entangled fields and performing joint measurements. This experiment demonstrates the ability of entanglement to implement interferometric imaging.