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:1004.0251 · Physical Review Letters

Hiding Single Photons with Spread Spectrum Technology

Chinmay Belthangady, Chih‐Sung Chuu, Ite A. Yu, G. Y. Yin, Joseph M. Kahn, Stephen E. Harris

Published Jun 1, 2010• 42 citations
arXivHTMLPDF

Abstract

We describe a proof-of-principal experiment demonstrating the use of spread spectrum technology at the single photon level. We show how single photons with a prescribed temporal shape, in the presence of interfering noise, may be hidden and recovered.
DOI
10.1103/physrevlett.104.223601

Related papers

Hiding Single Photons with Spread Spectrum Technology

Chih‐Sung Chuu, Chinmay Belthangady, Ite A. Yu +3 more

Bulletin of the American Physical Society•Jun 17, 2011•3 citations

Long and Short Entangled Photons

S. E. Harris

We use slow light and electromagnetically induced transparency to make and modulate single photons. Using spread spectrum technology we describe how a single photon may be hidden in an environment of noise photons. Article not available.

Nonlinear Optics•Jan 1, 2011•0 citations

Discussion on the Implications of Single Photon in Double Slit Interference and Delay Selection Experiments

军利 陈

Modern Physics•Jan 1, 2022•0 citations

Research Studies on Photons and Biphotons

Stephen E. Harris

Abstract : The central theme of the work on this contract has been: development of techniques and ideas for the control of the waveforms of single photons and the extension of the concepts of nonlinear optics into the x-ray portion of the electromagnetic spectrum. Advances in the first portion of this work include: the first demonstration of use of spread spectrum technology at the single photon level, and in particular the demonstration that it is possible to hide a single photon in an environment of a much higher density of photons with the same spectral power density, and the first demonstration of the technique of chirp and compress, again at the level of a single photon. Key contributions and advances in the hard x-ray portion of this work include: The invention of a new technique for the generation of polarization entangled x-ray biphotons (theoretical), and the demonstration of parametric down conversion in the Langevin regime. Recently, a paper describing the first demonstration of second harmonic generation at x-ray wavelengths has been submitted.

•Oct 1, 2013•0 citations

Interference of single photons

Oleg N Krokhin

The observed interference of single photons is explained without contradiction with the indivisibility principle.

Bulletin of the Lebedev Physics Institute•Apr 1, 2014•0 citations

Demonstrating table-top interferometric imaging using a path-entangled single photon towards quantum telescopy

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

There have been several versions of optical wavelength astronomical imaging interferometers over the years, with the preferred form being Michelson direct detection (though Hanbury-Brown-Twiss is currently in revival). Even though it is prevalent in radio astronomy, using a common reference (e.g., a laser) is known to have a poor signal-to-noise ratio at visible wavelengths as the shot noise introduced by the reference overwhelms the considerably weaker signal collected by the telescopes. In 2012, a team of quantum physicists (Gottesman, Jennewein and Croke (GJC)) proposed a novel method for using a common optical reference that would abate the shot-noise issue: a path-entangled single-photon reference (i.e., a single photon that is split on a beam splitter). Transported to the various telescopes using a quantum network to overcome loss, the distributed single photon is then interfered with the optical field collected by the telescopes. Previously, we successfully demonstrated a proof-of-principle table-top experiment that implements the GJC protocol where we recovered the spatial autocorrelation of quasi-thermal double-slit sources in a single spectral-temporal mode where the single photon was produced by heralded parametric down conversion. Using quantum optics theory, we modeled our system and found good agreement allowing us to extend our model, and compare and contrast with similarly weak, non-single-photon reference sources (e.g., coherent states). Using the knowledge gained from this experiment, we document the plausibility of an on-sky measurement of the sun utilizing a similar phase reference.

SPIE Optical and Infrared Interferometry and Imaging•Aug 28, 2024•0 citations
Abstract : The central theme of the work on this contract has been: development of techniques and ideas for the control of the waveforms of single photons and the extension of the concepts of nonlinear optics into the x-ray portion of the electromagnetic spectrum. Advances in the first portion of this work include: the first demonstration of use of spread spectrum technology at the single photon level, and in particular the demonstration that it is possible to hide a single photon in an environment of a much higher density of photons with the same spectral power density, and the first demonstration of the technique of chirp and compress, again at the level of a single photon. Key contributions and advances in the hard x-ray portion of this work include: The invention of a new technique for the generation of polarization entangled x-ray biphotons (theoretical), and the demonstration of parametric down conversion in the Langevin regime. Recently, a paper describing the first demonstration of second harmonic generation at x-ray wavelengths has been submitted.
There have been several versions of optical wavelength astronomical imaging interferometers over the years, with the preferred form being Michelson direct detection (though Hanbury-Brown-Twiss is currently in revival). Even though it is prevalent in radio astronomy, using a common reference (e.g., a laser) is known to have a poor signal-to-noise ratio at visible wavelengths as the shot noise introduced by the reference overwhelms the considerably weaker signal collected by the telescopes. In 2012, a team of quantum physicists (Gottesman, Jennewein and Croke (GJC)) proposed a novel method for using a common optical reference that would abate the shot-noise issue: a path-entangled single-photon reference (i.e., a single photon that is split on a beam splitter). Transported to the various telescopes using a quantum network to overcome loss, the distributed single photon is then interfered with the optical field collected by the telescopes. Previously, we successfully demonstrated a proof-of-principle table-top experiment that implements the GJC protocol where we recovered the spatial autocorrelation of quasi-thermal double-slit sources in a single spectral-temporal mode where the single photon was produced by heralded parametric down conversion. Using quantum optics theory, we modeled our system and found good agreement allowing us to extend our model, and compare and contrast with similarly weak, non-single-photon reference sources (e.g., coherent states). Using the knowledge gained from this experiment, we document the plausibility of an on-sky measurement of the sun utilizing a similar phase reference.