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6 papers · 2 filters
The axial breathing mode in rapidly rotating Bose-Einstein condensates and uncertainty of the rotation velocity
Gentaro Watanabe
Experiments on the axial breathing mode in a rapidly rotating Bose-Einstein condensate are examined. Assuming a cold cloud without thermal component, we show that errors due to def…
Mesoscopic conductance fluctuations in a coupled quantum dot system
Kazutaka Takahashi, Tomosuke Aono
We study the transport properties of an Aharonov-Bohm ring containing two quantum dots. One of the dots has well-separated resonant levels, while the other is chaotic and is treate…
Current-induced vortex displacement and annihilation in a single Permalloy disk
T. Ishida, T. Kimura, Y. Otani
The induced motion of a magnetic vortex in a micron-sized ferromagnetic disk due to the DC current injection is studied by measuring planar Hall effect. The DC current injection is…
Current-induced Vortex Motion by Spin-Transfer Torque
Junya Shibata, Yoshinobu Nakatani, Gen Tatara +2
We investigate the dynamics of a magnetic vortex driven by spin-transfer torque due to spin current in the adiabatic case. The vortex core represented by collective coordinate expe…
Full counting-statistics in a single-electron transistor in the presence of nonequilibrium quantum fluctuations of charge
Yasuhiro Utsumi
Using the Schwinger-Keldysh approach and the drone (Majorana) fermion representation, we evaluate current distribution in a single-electron transistor in a regime where a total tun…
Electron-electron interactions in a one-dimensional quantum wire spin filter
P. Devillard, A. Crepieux, K. I. Imura +1
The combined presence of a Rashba and a Zeeman effect in a ballistic one-dimensional conductor generates a spin pseudogap and the possibility to propagate a beam with well defined…