Shot noise by quantum scattering in chaotic cavities

Citation
S. Oberholzer et al., Shot noise by quantum scattering in chaotic cavities, PHYS REV L, 86(10), 2001, pp. 2114-2117
Citations number
22
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
10
Year of publication
2001
Pages
2114 - 2117
Database
ISI
SICI code
0031-9007(20010305)86:10<2114:SNBQSI>2.0.ZU;2-E
Abstract
We have experimentally studied shot noise of chaotic cavities defined by tw o quantum point contacts in series. The cavity noise is determined as (1/4) 2e[1] in agreement with theory and can be well distinguished from other con tributions to noise generated at the contacts. Subsequently, we have found that cavity noise decreases if one of the contacts is further opened and re aches neatly zero for a highly asymmetric cavity. Heating inside the cavity due to electron-electron interaction can slightly enhance the noise of lar ge cavities and is also discussed quantitatively.