Journal
PHYSICAL REVIEW B
Volume 95, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.115103
Keywords
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Funding
- Fundacao para a Ciencia e a Tecnologia [PTDC/EEI-TEL/4543/2014]
- Instituto de Telecomunicacoes [UID/EEA/50008/2013]
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We study the role of topological edge states of light in the transport of thermally generated radiation in a closed cavity at a thermodynamic equilibrium. It is shown that even in the zero temperature limit-when the field fluctuations are purely quantum mechanical-there is a persistent flow of electromagnetic momentum in the cavity in closed orbits, deeply rooted in the emergence of spatially separated unidirectional edge state channels. It is highlighted that the electromagnetic orbital angular momentum of the system is nontrivial, and that the energy circulation is towards the same direction as that determined by incomplete cyclotron orbits near the cavity walls. Our findings open inroads in topological photonics and suggest that topological states of light can determine novel paradigms in the context of radiative heat transport.
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