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

Journal of Modern Optics

Correlated photons for correlated atoms

Paul D. Lett

Published Jun 18, 2004• 11 citations
Publisher

Abstract

An arrangement for producing correlated and entangled photons and atoms is proposed. A geometry known as a two-beam-excited conical emission for degenerate four-wave mixing in alkali vapours is used to create correlated photons near the resonance frequencies of Bose-condensable alkali atoms. These photons can then be allowed to interact with an atomic Bose-Einstein condensate and eject correlated and entangled atom beams. A description of the proposed source and some of the possible applications are given.

DOI
10.1080/09500340408232493

Related papers

Paired-atom laser beams created via four-wave mixing

R. G. Dall, L. J. Byron, Andrew G. Truscott +3 more

A method to create paired-atom laser beams from a metastable helium atom laser via four-wave mixing is demonstrated. Radio-frequency outcoupling is used to extract atoms from a Bose-Einstein condensate near the center of the condensate and initiate scattering between trapped and untrapped atoms. The unequal strengths of the interactions for different internal states allows an energy-momentum resonance which leads to the creation of pairs of atoms scattered from the zero-velocity condensate. The resulting scattered beams are well separated from the main atom laser in the two-dimensional transverse atom laser profile. Numerical simulations of the system are in good agreement with the observed atom laser spatial profiles and indicate that the scattered beams are generated by a four-wave mixing process, suggesting that the beams are correlated.

arXiv:0806.0212•Physical Review A•Jan 9, 2009•42 citations

Entangled Pairs of Photons for Squeezed Light: Generation and Application

M. M. Ćurčić, D. Arsenović, B. M. Jelenković

We discuss methods of generation of quantum entangled pairs of photons and present results obtained by non-linear process of four way mixing (FWM) in alkali atoms. Two-mode squeezing, known also as relative amplitude squeezing, by a pair of photons generated by FWM has been thoroughly investigated because of important applications of such paired photons. We show strong intensity squeezing in potassium vapour and also dependence of IDS on FWM parameters. Experimental results are compared with calculated IDS by the model of operators. Examples of application of twin photons for quantum enhanced sensing and quantum imaging and microscopy will be given.

International Conference on Transparent Optical Networks•Jul 2, 2023•0 citations

Generation of Macroscopic Pair-Correlated Atomic Beams by Four-Wave Mixing in Bose-Einstein Condensates

J. M. M. J. Vogels, K. Xu, Wolfgang Ketterle

By colliding two Bose-Einstein condensates, we have observed strong bosonic stimulation of the elastic scattering process. When a weak input beam was applied as a seed, it was amplified by a factor of 20. This large gain atomic four-wave mixing resulted in the generation of two macroscopically occupied pair-correlated atomic beams.

arXiv:cond-mat/0203286•Physical Review Letters•Jun 24, 2002•131 citations

Quantum correlated light beams from non-degenerate four-wave mixing in an atomic vapor: the D1 and D2 lines of ^85Rb and ^87Rb

Raphael C. Pooser, Alberto M. Marino, Vincent Boyer +2 more

We present experimental results showing that quantum correlated light can be produced using non-degenerate, off-resonant, four-wave mixing (4WM) on both the D1 (795 nm) and D2 (780 nm) lines of (85)Rb and (87)Rb, extending earlier work on the D1 line of (85)Rb. Using this 4WM process in a hot vapor cell to produce bright twin beams, we characterize the degree of intensity-difference noise reduction below the standard quantum limit for each of the four systems. Although each system approximates a double-lambda configuration, differences in details of the actual level structure lead to varying degrees of noise reduction. The observation of quantum correlations on light produced using all four of these systems, regardless of their substructure, suggests that it should be possible to use other systems with similar level structures in order to produce narrow frequency, non-classical beams at a particular wavelength.

Optics Express•Sep 3, 2009•65 citations

EIT enhancement of 4-wave mixing for correlated photon generation

Vincent Boyer, Colin F. McCormick, K. M. Jones +1 more

We report our progress towards the realization of a tunable and narrow-band source of correlated photons for coherent manipulation of cold atoms, using a combination of four-wave mixing and electromagnetically induced transparency.

Conference on Lasers and Electro-Optics•Jan 1, 2006•0 citations

Four-wave mixing in spin–orbit coupled Bose–Einstein condensates

Nguyen Viet Hung, Piotr Szańkowski, Vladimir V Konotop +1 more

Abstract We describe possibilities of spontaneous, degenerate four-wave mixing (FWM) processes in spin–orbit coupled Bose–Einstein condensates. Phase matching conditions (i.e., energy and momentum conservation laws) in such systems allow one to identify four different configurations characterized by involvement of distinct spinor states in which such a process can take place. We derived these conditions from first principles and then illustrated dynamics with direct numerical simulations. We found, among others, the unique configuration, where both probe waves have smaller group velocity than pump wave and proved numerically that it can be observed experimentally under proper choice of the parameters. We also reported the case when two different FWM processes can occur simultaneously. The described resonant interactions of matter waves is expected to play an important role in the experiments of BEC with artificial gauge fields. Beams created by FWM processes are an important source of correlated particles and can be used in the experiments testing quantum properties of atomic ensembles.

arXiv:1901.06173•New Journal of Physics•Mar 13, 2020•8 citations
An arrangement for producing correlated and entangled photons and atoms is proposed. A geometry known as a two-beam-excited conical emission for degenerate four-wave mixing in alkali vapours is used to create correlated photons near the resonance frequencies of Bose-condensable alkali atoms. These photons can then be allowed to interact with an atomic Bose-Einstein condensate and eject correlated and entangled atom beams. A description of the proposed source and some of the possible applications are given.
A method to create paired-atom laser beams from a metastable helium atom laser via four-wave mixing is demonstrated. Radio-frequency outcoupling is used to extract atoms from a Bose-Einstein condensate near the center of the condensate and initiate scattering between trapped and untrapped atoms. The unequal strengths of the interactions for different internal states allows an energy-momentum resonance which leads to the creation of pairs of atoms scattered from the zero-velocity condensate. The resulting scattered beams are well separated from the main atom laser in the two-dimensional transverse atom laser profile. Numerical simulations of the system are in good agreement with the observed atom laser spatial profiles and indicate that the scattered beams are generated by a four-wave mixing process, suggesting that the beams are correlated.
We discuss methods of generation of quantum entangled pairs of photons and present results obtained by non-linear process of four way mixing (FWM) in alkali atoms. Two-mode squeezing, known also as relative amplitude squeezing, by a pair of photons generated by FWM has been thoroughly investigated because of important applications of such paired photons. We show strong intensity squeezing in potassium vapour and also dependence of IDS on FWM parameters. Experimental results are compared with calculated IDS by the model of operators. Examples of application of twin photons for quantum enhanced sensing and quantum imaging and microscopy will be given.
We present experimental results showing that quantum correlated light can be produced using non-degenerate, off-resonant, four-wave mixing (4WM) on both the D1 (795 nm) and D2 (780 nm) lines of (85)Rb and (87)Rb, extending earlier work on the D1 line of (85)Rb. Using this 4WM process in a hot vapor cell to produce bright twin beams, we characterize the degree of intensity-difference noise reduction below the standard quantum limit for each of the four systems. Although each system approximates a double-lambda configuration, differences in details of the actual level structure lead to varying degrees of noise reduction. The observation of quantum correlations on light produced using all four of these systems, regardless of their substructure, suggests that it should be possible to use other systems with similar level structures in order to produce narrow frequency, non-classical beams at a particular wavelength.
Abstract We describe possibilities of spontaneous, degenerate four-wave mixing (FWM) processes in spin–orbit coupled Bose–Einstein condensates. Phase matching conditions (i.e., energy and momentum conservation laws) in such systems allow one to identify four different configurations characterized by involvement of distinct spinor states in which such a process can take place. We derived these conditions from first principles and then illustrated dynamics with direct numerical simulations. We found, among others, the unique configuration, where both probe waves have smaller group velocity than pump wave and proved numerically that it can be observed experimentally under proper choice of the parameters. We also reported the case when two different FWM processes can occur simultaneously. The described resonant interactions of matter waves is expected to play an important role in the experiments of BEC with artificial gauge fields. Beams created by FWM processes are an important source of correlated particles and can be used in the experiments testing quantum properties of atomic ensembles.