Tey, Lian Seng and Muniandy, S. and Chong, Wu Yi (2025) Modeling memory function of entangled photon and classical laser photon-count fluctuations using white noise integral analysis. Physica Scripta, 100 (1). 015243. ISSN 0031-8949, DOI https://doi.org/10.1088/1402-4896/ad9960.
Full text not available from this repository.Abstract
This study investigates photon-count fluctuation dynamics of two light sources, namely a spontaneous parametric down-conversion (SPDC) light source and a 780 nm attenuated laser diode (LD). White noise integral with customizable memory function is used to model the mean square displacements (MSDs) and the probability density functions (PDFs) for both light sources. This approach overcomes the limitation of monofractal scaling of fractional Brownian motion (fBm) model characterized by a single Hurst exponent. The memory function used has an exponential-tempered power-law relation, parametrized by mu and beta, where beta modulates the extent of memory parameter mu. Although optical losses and detector inefficiencies degrade photon statistics to Poissonian at post-detection, our findings reveal notable memory effects at higher mean photon counts, especially in the SPDC source with memory parameter mu (sic) 1.00, compared to the classical LD, which remained relatively constant at mu (sic) 1.00. Both light sources shared similar correction parameters beta, which indicates they have identical photon-count fluctuations at short time but diverge significantly at longer time. This work highlights the need for models beyond fBm, capable of capturing complex MSD behaviors of photon-count fluctuations.
| Item Type: | Article |
|---|---|
| Funders: | Malaysian Ministry of Higher Education Fundamental Research Grant Scheme (FRGS/1/2024/STG07/UM/01/1) |
| Uncontrolled Keywords: | white noise analysis; memory function; fractional brownian motion; spontaneous parametric down-conversion; photon statistics; fluctuation |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 20 Mar 2025 00:48 |
| Last Modified: | 20 Mar 2025 00:48 |
| URI: | http://eprints.um.edu.my/id/eprint/47233 |
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