Volume 86, Number 1, April 2009
Article Number 17004
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 15 April 2009
EPL, 86 (2009) 17004
DOI: 10.1209/0295-5075/86/17004

Fermi-edge problem in the presence of AC electric field

Yi Zhou and Tai-Kai Ng

Department of Physics, Hong Kong University of Science and Technology - Clear Water Bay Road, Kowloon, Hong Kong

received 27 December 2008; accepted in final form 9 March 2009; published April 2009
published online 15 April 2009

In this paper, we study a non-equilibrium Fermi-edge problem where the system under investigation is a single electron reservoir put under an AC electric field. We show that the electron Green's function and other correlation functions in the problem can be solved and expressed exactly in terms of a well-defined integral. The qualitative behaviors of the solution is studied and compared with the situation where the impurity is coupled to more than one reservoir at different chemical potentials.

71.27.+a - Strongly correlated electron systems; heavy fermions.
71.30.+h - Metal-insulator transitions and other electronic transitions.

© EPLA 2009