Photonic dephasing dynamics and the role of initial correlations

Sina Hamedani Raja*, K. P. Athulya, Anil Shaji, Jyrki Piilo

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


Photons are useful quantum systems for investigating the fundamental and practical aspects of dephasing, decoherence, and other types of open quantum dynamics. However, descriptions of open dynamics of photonic systems are usually in terms of decoherence functions and in many cases an explicit master-equation-based description is not available. This is particularly true when considering multipartite photonic open systems having possibly correlated environments. We obtain generic master equations for the reduced dephasing dynamics of a two-photon polarization state coupled to respective frequency degrees of freedom when the frequency degrees of freedom that form the environment are initially correlated. Our results show the explicit dependence of the operator form of the master equation and the decay rates on these correlations as well as on various types of frequency distributions. Furthermore, we use the recently developed bath-positive decomposition method to treat an initially correlated polarization-frequency state of a photon and demonstrate how this allows us to gain new insight and detailed information on how the contributions of different origins influence the photonic dephasing.

Original languageEnglish
Article number042127
Number of pages11
JournalPhysical Review A
Issue number4
Publication statusPublished - 28 Apr 2020
MoE publication typeA1 Journal article-refereed


  • Open quantum system
  • Master equation
  • Photonic System
  • Quantum correlations
  • Complete positivity


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