ua nt - p h / 01 12 02 7 v 2 1 9 A ug 2 00 3 Dynamical effects of a one - dimensional multibarrier potential of finite range
نویسندگان
چکیده
We discuss the properties of a large number N of one-dimensional (bounded) locally periodic potential barriers in a finite interval. We show that the transmission coefficient, the scattering cross section σ, and the resonances of σ depend sensitively upon the ratio of the total spacing to the total barrier width. We also show that a time dependent wave packet passing through the system of potential barriers rapidly spreads and deforms, a criterion suggested by Za-slavsky for chaotic behaviour. Computing the spectrum by imposing (large) periodic boundary conditions we find a Wigner type distribution. We investigate also the S-matrix poles; many resonances occur for certain values of the relative spacing between the barriers in the potential.
منابع مشابه
ar X iv : q ua nt - p h / 02 12 09 7 v 3 4 A ug 2 00 5 Parity Effects in Spin Decoherence
A. Melikidze, V. V. Dobrovitski, H. A. De Raedt, M. I. Katsnelson, and B. N. Harmon Kavli Institute for Theoretical Physics, University of California, Santa Barbara CA 93106, USA Ames Laboratory, Iowa State University, Ames IA 50011, USA 3 Applied Physics Computational Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands Uppsala Univers...
متن کاملua nt - p h / 02 08 03 5 v 1 6 A ug 2 00 2 Kicked Rotor in Wigner Phase Space
We develop the Wigner phase space representation of a kicked particle for an arbitrary but periodic kicking potential. We use this formalism to illustrate quantum resonances and anti–resonances.
متن کاملua nt - p h / 04 08 18 9 v 1 3 1 A ug 2 00 4 Periodic square - well potential and spontaneous breakdown of PT - symmetry February 9 , 2008
A particle moving on a circle in a purely imaginary one-step potential is studied in both the exact and broken PT -symmetric regime.
متن کاملar X iv : q ua nt - p h / 06 02 03 6 v 3 1 5 A ug 2 00 6 7 dB
Shigenari Suzuki, 2, 3 Hidehiro Yonezawa, 4 Fumihiko Kannari, Masahide Sasaki, 4 and Akira Furusawa 4 Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Advanced Communications Technology Group, National Institute of Information and Communications Technology (NICT), 4-2-1 Nukui-kitamachi, Koganei, Tokyo 184-8795, Japan Department of Electronics...
متن کامل