Effects of breaking current conservation on the phase properties of two-terminal quantum systems
(2003) In Physica E: Low-Dimensional Systems and Nanostructures 17(1-4). p.579-583- Abstract
- We study the reflection and transmission phase properties of two-terminal quantum structures coupled to a third lead. The systems are effectively three-terminal and current conservation is broken with regard to the original two-terminal systems. Two structures, a waveguide with an attached stub quantum dot and a waveguide with an inline, double-barrier confined quantum dot, are considered. The transmission and reflection phase properties are calculated for these systems with different couplings to the third lead. The results show that the discontinuous phase shifts seen in the current-conserved two-terminal systems are removed when the third lead is attached. However, as long as the coupling between the quantum systems and the additional... (More)
- We study the reflection and transmission phase properties of two-terminal quantum structures coupled to a third lead. The systems are effectively three-terminal and current conservation is broken with regard to the original two-terminal systems. Two structures, a waveguide with an attached stub quantum dot and a waveguide with an inline, double-barrier confined quantum dot, are considered. The transmission and reflection phase properties are calculated for these systems with different couplings to the third lead. The results show that the discontinuous phase shifts seen in the current-conserved two-terminal systems are removed when the third lead is attached. However, as long as the coupling between the quantum systems and the additional lead is weak, sharp but continuous phase drops within narrow energy ranges can still be clearly identified. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/311914
- author
- Fasth, Carina LU and Xu, Hongqi LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- quantum dots, two- and, waveguides, phase properties, quantum transport, three-terminal systems
- in
- Physica E: Low-Dimensional Systems and Nanostructures
- volume
- 17
- issue
- 1-4
- pages
- 579 - 583
- publisher
- Elsevier
- external identifiers
-
- wos:000182700700195
- scopus:0037393140
- ISSN
- 1386-9477
- DOI
- 10.1016/S1386-9477(02)00875-5
- language
- English
- LU publication?
- yes
- id
- f9384b16-8482-4b40-922b-c1b17c3e2920 (old id 311914)
- date added to LUP
- 2016-04-01 15:18:28
- date last changed
- 2022-01-28 04:43:11
@article{f9384b16-8482-4b40-922b-c1b17c3e2920,
abstract = {{We study the reflection and transmission phase properties of two-terminal quantum structures coupled to a third lead. The systems are effectively three-terminal and current conservation is broken with regard to the original two-terminal systems. Two structures, a waveguide with an attached stub quantum dot and a waveguide with an inline, double-barrier confined quantum dot, are considered. The transmission and reflection phase properties are calculated for these systems with different couplings to the third lead. The results show that the discontinuous phase shifts seen in the current-conserved two-terminal systems are removed when the third lead is attached. However, as long as the coupling between the quantum systems and the additional lead is weak, sharp but continuous phase drops within narrow energy ranges can still be clearly identified.}},
author = {{Fasth, Carina and Xu, Hongqi}},
issn = {{1386-9477}},
keywords = {{quantum dots; two- and; waveguides; phase properties; quantum transport; three-terminal systems}},
language = {{eng}},
number = {{1-4}},
pages = {{579--583}},
publisher = {{Elsevier}},
series = {{Physica E: Low-Dimensional Systems and Nanostructures}},
title = {{Effects of breaking current conservation on the phase properties of two-terminal quantum systems}},
url = {{http://dx.doi.org/10.1016/S1386-9477(02)00875-5}},
doi = {{10.1016/S1386-9477(02)00875-5}},
volume = {{17}},
year = {{2003}},
}