Multiple-path interferometer with a single quantum obstacle .

Schomerus, H. and Noat, Y. and Dalibard, J. and Beenakker, C. W. J. (2002) Multiple-path interferometer with a single quantum obstacle . EPL, 57. pp. 651-10682. ISSN 1286-4854

[img]
Preview
PDF (000174179900005.pdf)
000174179900005.pdf

Download (202kB)

Abstract

We consider the scattering of particles (kinetic energy eps) by an obstacle which tunnels coherently between two positions (tunnel splitting Delta), for arbitrary values of eps/Delta and scattering strength U. The obstacle mimics two classical scatterers at fixed positions when eps lesseq Delta. Interference disappears when eps >> Delta, but can be recovered if the elastic-scattering channel is detected only. At intermediate values of eps there is a systematic interplay of the coherent tunnel motion and the ballistic particle motion. We show that the transmission probability can remain finite even in the limit U->infinity because the particle can evade the obstacle systematically. We discuss the realization of a quantum obstacle in mesoscopic systems.

Item Type: Journal Article
Journal or Publication Title: EPL
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 686
Deposited By: Dr Henning Schomerus
Deposited On: 31 Oct 2007
Refereed?: Yes
Published?: Published
Last Modified: 25 Aug 2019 01:02
URI: https://eprints.lancs.ac.uk/id/eprint/686

Actions (login required)

View Item View Item