Photon Correlation Effects in Single and Multi - Systems

Dario Gerace, Hakan E. Türeci, Sara Ferretti +4 more

Second-order photon correlation measurements are established not only as a probe of single-photon nonlinear behaviour of a single cavity, but as an effective probe of the out-of-equilibrium manybody state in multiple tunnel-coupled nonlinear cavities.

John Rarity, P. R. Tapster

Sergey Yu. Kazantsev, A. V. Bahus, A. K. Nanidzhanyan +1 more

The results of the study on the correlation of polarization distortions in a multi-core fiber (MCF) under external influences are presented. The influence of mechanical effects and the effect of a magnetic field on the cores of the MCF are investigated. A high correlation of polarization distortions in different cores of a multi-core fiber under physical influence is observed. These results are useful for developing methods to mitigate distortions in the polarization states of single photons in wire quantum channels for quantum key distribution systems.

Ling-an, Wu

Xinke Li, Rui Liu, Yuan Zhou +3 more

In this paper, we propose a practical scheme to realize tunable multi-photon blockades and antibunched emissions of single and paired multi-photon bundles in a single Josephson-photonics device, consisting of a voltage-biased Josephson junction, a superconducting qubit and two nondegenerate microwave resonators. Under multi-photon resonance conditions, Cooper-pair tunneling is effectively modulated by the two-level qubit, inducing various multi-photon tripartite interactions among the three subsystems and enabling tunable multi-photon blockades. With engineered dissipation introduced, the device produces antibunched single multi-photon bundles from one resonator as well as correlated paired bundles from both resonators. By extending generalized second-order correlation functions to characterize paired-bundle emissions, we show via numerical simulations that both single and paired multi-photon bundles exhibit strong antibunching and high interbundle correlations. This work provides a promising experimental pathway toward constructing tunable multi-photon blockades and nonclassical multi-photon-bundle sources, with potential applications in quantum information processing and fundamental research on multi-photon multipartite interactions.

R. v. Baltz