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We theoretically investigate photo-thermoelectric transport through a quantumwire in a photon cavity coupled to electron reservoirs with differenttemperatures. Our approach, based on a quantum master equation, allows us toinvestigate the influence of a quantized photon field on the heat current andthermoelectric transport in the system. We find that the heat current throughthe quantum wire is influenced by the photon field resulting in a negative heatcurrent in certain cases. The characteristics of the transport are studied bytuning the ratio, $\hbar\omega_{\gamma} / k_{\rm B} \Delta T$, between thephoton energy, $\hbar\omega_{\gamma}$, and the thermal energy, $k_{\rm B}\Delta T$. The thermoelectric transport is enhanced by the cavity photons when$k_{\rm B} \Delta T > \hbar\omega_{\gamma}$. By contrast, if $k_{\rm B} \DeltaT < \hbar\omega_{\gamma}$, the photon field is dominant and a suppression inthe thermoelectric transport can be found in the case when the cavity-photonfield is close to a resonance with the two lowest one-electron states in thesystem. Our approach points to a new technique to amplify thermoelectriccurrent in nano-devices.

Effects of photon field on heat transport through a quantum wire attached to leads