Photovoltaic Current Response of Mesoscopic Conductors to Quantized Cavity Modes

Details Photovoltaic Current Response of Mesoscopic Conductors to Quantized Cavity Modes Photovoltaic Current Response of Mesoscopic Conductors to Quantized Cavity Modes

2006-10-13

arxiv.org/abs/cond-mat/0610384v1

Phys. Rev. Lett. 97, 216801 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.97.216801

We extend the analysis of the effects of electromagnetic (EM) fields on mesoscopic conductors to include the effects of field quantization, motivated by recent experiments on circuit QED. We show that in general there is a photovoltaic (PV) current induced by quantized cavity modes at zero bias across the conductor. This current depends on the average photon occupation number and vanishes identically when it is equal to the average number of thermal electron-hole pairs. We analyze in detail the case of a chaotic quantum dot at temperature T_e in contact with a thermal EM field at temperature T_f, calculating the RMS size of the PV current as a function of the temperature difference, finding an effect ~pA.

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