Abstract
We propose a scheme to modulate quantum transport in nanostructures based on classical chaos. By applying external gate voltage to generate a classically forbidden region, transient chaos can be generated, and the escape rate associated with the underlying non-attracting chaotic set can be varied continuously by adjusting the gate voltage. We demonstrate that this can effectively modulate the quantum conductance-fluctuation patterns. A theory based on self-energies and the spectrum of the generalized non-Hermitian Hamiltonian of the open quantum system is developed to understand the modulation mechanism. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3690046]
| Original language | English |
|---|---|
| Article number | 093105 |
| Number of pages | 4 |
| Journal | Applied Physics Letters |
| Volume | 100 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 27 Feb 2012 |
Keywords
- chaos
- electrical conductivity
- nanostructured materials
- quantum dots
- conductance fluctuations
- systems
- eigenfunctions
- orbits
- scars