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

Frontiers in Optics

Two-photon Anti-correlation and Interference with Incoherent Thermal Radiations

Hui Chen, Tao Peng, Sanjit Karmakar, Yanhua H. Shih

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We successfully simulate the behavior of entangled states by multi-photon interference of thermal light. Experimentally, we observed anti-correlation and polarization correlation with more than 71% visibility. The experiment is theoretically analyzed and formulated with quantum mechanics theory.
DOI
10.1364/fio.2011.fths4

Related papers

Simulation of Bell states with incoherent thermal light

Hui Chen, Tao Peng, Sanjit Karmakar +1 more

This paper reports our experimental study of thermal light multi-photon qubits. Taking advantage of two-photon interference, we have successfully observed Bell-type correlation from mutually incoherent and orthogonally polarized thermal fields. The visibilities of the polarization correlation and the temporal anti-correlation both exceed 71%, indicating the behavior of a two-photon Bell state or a two-digit qubit.

New Journal of Physics•Aug 12, 2011•14 citations

Observation of Anti-correlation of Classical Chaotic Light

Chen, Hui, Sanjit Karmakar, Zhenda Xie +1 more

We wish to report an experimental observation of anti-correlation from first-order incoherent classical chaotic light. We explain why the classical statistical theory does not apply and provide a quantum interpretation. In quantum theory, either correlation or anti-correlation is a two-photon interference phenomenon, which involves the superposition of two-photon amplitudes, a nonclassical entity corresponding to different yet indistinguishable alternative ways of producing a joint-photodetection event.

arXiv:0911.0052•Oct 31, 2009•1 citation

Experimental study of the momentum correlation of a pseudo-thermal field in the photon counting regime

Giuliano Scarcelli, Alejandra Valencia, Yanhua H. Shih

Thermal radiation has been recently proposed for imaging and interference experiments to simulate entangled state. We report an experimental study on the momentum correlation properties of a pseudo-thermal field in the photon counting regime.

Quantum Electronics and Laser Science Conference•Dec 10, 2005•2 citations

Changing correlation into anticorrelation by superposing thermal and laser light

Jianbin Liu, Yu Zhou, Fuli Li +1 more

Correlation can be changed into anticorrelation by superposing thermal and laser light with the same frequency and polarization. Two-photon interference theory is employed to interpret this phenomenon. An experimental scheme is designed to verify the theoretical predictions by employing pseudothermal light to simulate thermal light. The experimental results are consistent with the theoretical results.

Journal of the Optical Society of America A•Jun 11, 2014•2 citations

Bell correlation of thermal fields in photon-number fluctuations

Tao Peng, Yanhua H. Shih

We wish to report a recent experimental observation of the Bell correlation from the polarization measurement of thermal fields in photon-number fluctuations, indicating the successful simulation of a Bell state. The same mechanism can be applied for the simulation of a multi-photon GHZ state and N -qubits for N ≫ 2.

Europhysics Letters (EPL)•Dec 1, 2015•5 citations

Experimental characterization of multi-photon entanglement with intensity correlation functions

I. N. Agafonov, Maria V. Chekhova, T. Sh. Iskhakov

We consider possible ways to recognize multi-photon entangled states in experiment. A commonly used technique is to measure higher-order multi-photon correlation functions and their dependence on certain phase delays (multi-photon interference). Theoretically and experimentally, we show that multi-photon interference can have very high visibility for classical sources: up to 81.8% in the three-photon case and up to 94.4% in the four-photon one. Therefore, the visibility of multi-photon interference should not be used as a criterion of multi-photon entangled states generation. Instead, we suggest to characterize multi-photon entanglement by the photon-number dependence of the normalized correlation functions.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jun 15, 2007•0 citations
We wish to report an experimental observation of anti-correlation from first-order incoherent classical chaotic light. We explain why the classical statistical theory does not apply and provide a quantum interpretation. In quantum theory, either correlation or anti-correlation is a two-photon interference phenomenon, which involves the superposition of two-photon amplitudes, a nonclassical entity corresponding to different yet indistinguishable alternative ways of producing a joint-photodetection event.
We consider possible ways to recognize multi-photon entangled states in experiment. A commonly used technique is to measure higher-order multi-photon correlation functions and their dependence on certain phase delays (multi-photon interference). Theoretically and experimentally, we show that multi-photon interference can have very high visibility for classical sources: up to 81.8% in the three-photon case and up to 94.4% in the four-photon one. Therefore, the visibility of multi-photon interference should not be used as a criterion of multi-photon entangled states generation. Instead, we suggest to characterize multi-photon entanglement by the photon-number dependence of the normalized correlation functions.