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

New Journal of Physics

Published Sep 16, 2016• 0 citations
OpenAlex

Abstract

Spatiotemporal correlations in entangled photons generated by spontaneous parametric down conversion This article has been downloaded from IOPscience. Please scroll down to see the full text article.

Related papers

Full Schmidt characterization of spatiotemporally entangled states produced from spontaneous parametric down-conversion

Anonymous, Girish Ashok Kulkarni

Physical Review A•Jul 7, 2026•0 citations

New Journal of Physics

Quantum teleportation and entanglement swapping with linear optics logic gates This article has been downloaded from IOPscience. Please scroll down to see the full text article.

•Sep 13, 2016•0 citations

Property of Entangled Photon Pairs Generated via Spontaneous Parametric Down Conversion

宋媛媛 Song Yuanyuan, 陈鼎 Chen Ding, 丛爽 Cong Shuang

Laser & Optoelectronics Progress•Jan 1, 2019•0 citations

Spatiotemporal correlations in entangled photons generated by spontaneous parametric down conversion

Clara I. Osorio, Alejandra Valencia, Juan P Torres

In most configurations aimed at generating entangled photons based on spontaneous parametric down conversion (SPDC), the generated pairs of photons are required to be entangled in only one degree of freedom. Any distinguishing information coming from the other degrees of freedom that characterize the photon should be suppressed to avoid correlations with the degree of freedom of interest. However, this suppression is not always possible. Here, we show how the frequency information available affects the purity of the two-photon state in space, revealing a correlation between the frequency and the space degrees of freedom. This correlation should be taken into account to calculate the total amount of entanglement between the photons.

arXiv:0804.2425•New Journal of Physics•Nov 10, 2008•46 citations

Full Schmidt characterization of spatiotemporally entangled states produced from spontaneous parametric down-conversion

Rakesh Pradhan, Girish Kulkarni

The full Schmidt decomposition of spatiotemporally entangled states generated from spontaneous parametric down-conversion (SPDC) has not been carried out until now due to the immense computational complexity arising from the large dimensionalities of the states. In this Letter, we utilize the rotational symmetry of the states to reduce the complexity by at least four orders of magnitude and carry out the decomposition to reveal the precise forms of the spatiotemporal Schmidt modes and the Schmidt spectrum spanning over 10^4 modes. We show that the Schmidt modes have a phase profile with a transverse spatial vortex structure that endows them with orbital angular momentum at all frequencies. In the high-gain regime, these Schmidt modes broaden and the Schmidt spectrum narrows with increasing pump strength. Our work can spur novel applications at the intersection of quantum imaging and spectroscopy that utilize entangled states produced from SPDC.

quant-pharXiv:2602.07949•Feb 10, 2026•0 citations

Production of Entangled Photons via Spontaneous Parametric Down-Conversion

Logan Kaelbling

•Jan 1, 2020•0 citations
In most configurations aimed at generating entangled photons based on spontaneous parametric down conversion (SPDC), the generated pairs of photons are required to be entangled in only one degree of freedom. Any distinguishing information coming from the other degrees of freedom that characterize the photon should be suppressed to avoid correlations with the degree of freedom of interest. However, this suppression is not always possible. Here, we show how the frequency information available affects the purity of the two-photon state in space, revealing a correlation between the frequency and the space degrees of freedom. This correlation should be taken into account to calculate the total amount of entanglement between the photons.
The full Schmidt decomposition of spatiotemporally entangled states generated from spontaneous parametric down-conversion (SPDC) has not been carried out until now due to the immense computational complexity arising from the large dimensionalities of the states. In this Letter, we utilize the rotational symmetry of the states to reduce the complexity by at least four orders of magnitude and carry out the decomposition to reveal the precise forms of the spatiotemporal Schmidt modes and the Schmidt spectrum spanning over 10^4 modes. We show that the Schmidt modes have a phase profile with a transverse spatial vortex structure that endows them with orbital angular momentum at all frequencies. In the high-gain regime, these Schmidt modes broaden and the Schmidt spectrum narrows with increasing pump strength. Our work can spur novel applications at the intersection of quantum imaging and spectroscopy that utilize entangled states produced from SPDC.