portrait portrait

DIPC–PAMS theory workshop

Towards reality in modelling of molecular electronics

June 13-17, 2016 ▪ Donostia-San Sebastián, Spain

Invited talk

Nonequilibrium Green's function method and near-field radiation

Jian-Sheng Wang

Department of Physics, National University of Singapore

The nonequilibrium Green's function (NEGF) method is a powerful technique for studying quantum transport. We begin with a brief introduction of NEGF, emphasizing the role of contour order in defining the Green's functions. After a briefly mentioning of few applications, we discuss the problem of near-field radiation between metal plates. In dealing with the quantum field of the electromagnetism, an operator normal order is essential in using the Poynting vector to compute the radiation energy flux. We then present results of our model calculations.

[1] J.-S. Wang, J. Wang, and J. T. Lü, Quantum thermal transport in nanostructures, Eur. Phys. J. B 62, 381 (2008).

[2] J.-S. Wang, B. K. Agarwalla, H. Li, and J. Thingna, Nonequilibrium Green's function method for quantum thermal transport, Front. Phys. 9, 673 (2014).