Current fluctuation by non-equilibrium Kondo effect in quantum dot
Project/Area Number |
25800174
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics I
|
Research Institution | The University of Tokyo |
Principal Investigator |
Sakano Rui 東京大学, 物性研究所, 助教 (00625022)
|
Research Collaborator |
Oguri Akira 大阪市立大学, 大学院理学研究科, 教授 (10204166)
Kobayashi Kensuke 大阪大学, 大学院理学研究科, 教授 (10302803)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
|
Keywords | 量子ドット / 多体効果 / 電流揺らぎ / 近藤効果 / ショットノイズ / 局所フェルミ流体 / 量子輸送 / 近藤相関 / スピン縺れ |
Outline of Final Research Achievements |
We have studied that dynamic properties of non-equilibrium steady states of the Kondo effect which is a typical quantum many-body effect formed in quantum dot, and non-equilibrium current fluctuations induced by them. It is succeeded to experimentally observe shot noise and effective charge state of the Kondo state in a carbon-nanotube quantum dot with high accuracy in collaboration with an experimental group. The exact solution of the impurity Anderson model which describe quantum dot systems, is derived at the high bias-voltage or high temperature limits, and many-body effects at the high energy limit is elucidated. Furthermore, it is elucidated that, entanglement properties of the quasiparticle pairs forming in non-equilibrium current at low bias-voltages, holds quantum-mechanical properties which are never achieved by classical mechanics.
|
Report
(4 results)
Research Products
(54 results)
-
-
-
-
-
-
[Presentation] 近藤効果が発現する量子ドットにおけるゆらぎの定理の検証2016
Author(s)
秦徳郎, 藤原亮, 荒川智紀, 小林研介, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会第71回年次大会
Place of Presentation
東北学院大学(宮城県仙台市)
Year and Date
2016-03-19
Related Report
-
-
-
-
-
-
[Presentation] Theoretical analysis on shot noise mearsurement in a carbon nanotube quantum dot2015
Author(s)
R. Yoshii, R. Fujiwara, T. Hata, T. Arakawa, K. Kobayashi, M. Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, R. Sakano, and A. Oguri
Organizer
GDR Physicque Quantique Mesoscopique - GDR-I Graphene & Nanotubes
Place of Presentation
Aussois(France)
Year and Date
2015-11-29
Related Report
Int'l Joint Research
-
[Presentation] Spectroscopy of Excited States in Carbon Nanotube Quantum Dot2015
Author(s)
Ryo Fujiwara, Tokuro Hata, Ryosuke Yoshii, Tomonori Arakawa, K. Kobayashi, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, R. Sakano, A. Oguri
Organizer
The International Symposium on Material Sciences
Place of Presentation
大坂大学(大阪府豊中市)
Year and Date
2015-11-17
Related Report
Int'l Joint Research
-
-
[Presentation] カーボンナノチューブ量子ドットにおけるショットノイズ測定II2015
Author(s)
藤原亮, 秦徳郎, 吉井涼輔, 荒川智紀, 小林研介, Meydi Ferrier, Raphaelle Delagrange, Richard DeblockB, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会2015年秋季大会
Place of Presentation
関西大学(大阪府吹田市)
Year and Date
2015-09-16
Related Report
-
[Presentation] カーボンナノチューブ量子ドットのクーロン閉塞状態における非線形ノイズの理論解析2015
Author(s)
吉井涼輔, 藤原亮, 荒川智紀, 秦徳郎, 小林研介, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会2015年秋季大会
Place of Presentation
関西大学(大阪府吹田市)
Year and Date
2015-09-16
Related Report
-
-
[Presentation] Spectroscopy of excited states in carbon nanotube quantum dot2015
Author(s)
Ryo Fujiwara, Tokuro Hata, Ryosuke Yoshii, Tomonori Arakawa, Kensuke Kobayashi, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, Rui Sakano, Akira Oguri
Organizer
5th Summer School on Semiconductor/Superconducting Quantum Coherence Effects and Quantum Information
Place of Presentation
ホテルサンバレー那須(栃木県那須郡)
Year and Date
2015-09-10
Related Report
-
-
[Presentation] Theoretical Study on Shot Noise in Coulomb Blockade Region for Carbon Nanotube Quantum Dot2015
Author(s)
R. Yoshii, R. Fujiwara, T. Hata, T. Arakawa, K. Kobayashi, M. Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, R. Sakano, and A. Oguri
Organizer
International Symposium on Fluctuation and Structure out of Equilibrium 2015
Place of Presentation
京都大学(京都府京都市)
Year and Date
2015-08-20
Related Report
Int'l Joint Research
-
-
-
-
[Presentation] Shot Noise Measurement and Theoretical Analysis on Carbon Nanotube Quantum Dot2015
Author(s)
R. Yoshii, R. Fujiwara, T. Hata, T. Arakawa, K. Kobayashi, M. Ferrier, R. Delagrange, R. Deblock, H. Bouchiat, R. Sakano, and A. Oguri
Organizer
the 21st International Conference on Electronic Properties of Two-Dimensional Systems
Place of Presentation
仙台国際センター(宮城県仙台市)
Year and Date
2015-07-26
Related Report
Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Crossover Between SU(2) & SU(4) Kondo Effects in a Carbon Nanotube Probed by Shot-Noise2014
Author(s)
Meydi Ferrier, Tomonori Arakawa, Ryo Fujiwara, Tokuro Hata, Kensuke Kobayashi, Richard Deblock, Raphaelle Delagrange, Helene Bouchiat, Rui Sakano, Akira Oguri
Organizer
The 32nd International Conference on Physics of Semiconductors
Place of Presentation
Austin, Texas(USA)
Year and Date
2014-08-10 – 2014-08-15
Related Report
-
-
-
-
-
-
-
-
-
-
-