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Superballistic Transport of Thermal Photons in Confined Many-Body Systems
Jian Dong1, Junming Zhao2, Philippe Ben-Abdallah3
1Shandong University, Institute of Frontier and Interdisciplinary Science, Qingdao 266237, China.
Abstract:
Ballistic transport is traditionally regarded as a limiting regime for scattering-free energy transfer. Here, we predict a superballistic radiative heat transport regime that surpasses this limit in dilute chains of plasmonic nanoparticles confined within cavities. This anomalous regime exhibits superlinear scaling of the effective thermal conductivity (κ∼L^{1.5}) and originates from the amplification of long-range interactions mediated by cavity-guided modes. Our results establish a framework for ultrafast photonic heat transport and open pathways for thermal management, information processing, and energy transfer in quantum and nanoscale systems.
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