Resonant tunnelling lifetimes in multi-barrier structures -
             complex rotation approach.

    M. Bylicki, W. Jaskolski, and R. Oszwaldowski

   Instytut Fizyki UMK, Grudziadzka 5, 87-100 Torun,
                       Poland 


                      Abstract

The application of complex rotation method, widely used in
theoretical atomic spectroscopy, is presented here to study
energies and lifetimes of resonant tunnelling in double-barrier
heterostructures within applied electric field. The method gives
very accurate results and they are compared with the ones
obtained by other methods. Possible applications of this method to study
resonant states in various low-dimensional structures  are discussed.