Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Ota, Takeshi"'
Autor:
Tu, Ngoc Han, Hashisaka, Masayuki, Ota, Takeshi, Sekine, Yoshiaki, Muraki, Koji, Fujisawa, Toshimasa, Kumada, Norio
Publikováno v:
Solid State Communications 283, 32 (2018)
We investigate the coupling between quantum Hall (QH) edge channels (ECs) located at opposite sides of a 50-um-wide Hall bar by exciting a charged wavepacket in one EC and detecting time-dependent current in the other EC. In a QH state, the current s
Externí odkaz:
http://arxiv.org/abs/1812.01271
Autor:
Eguchi, Tetsuya, Ishikawa, Tetsuya, Fujimura, Shigeto, Ota, Takeshi, Wakabayashi, Shokichi, Matsunami, Hisaya, Shinano, Takuro
Publikováno v:
In Journal of Environmental Radioactivity October 2021 237
Publikováno v:
In Journal of Environmental Radioactivity July 2021 233
We report measurements of multi-path transport through a triple quantum dot (TQD) in the few-electron regime using a GaAs three-terminal device with a separate lead attached to each dot. When two paths reside inside the transport window and are simul
Externí odkaz:
http://arxiv.org/abs/1311.6582
Publikováno v:
Appl. Phys. Lett. 102, 192104 (2013)
We study low-frequency noise in current passing through quantum point contacts fabricated from several GaAs/AlGaAs heterostructures with different layer structures and fabrication processes. In contrast to previous reports, there is no gate-dependent
Externí odkaz:
http://arxiv.org/abs/1305.6701
We investigate the group velocity of edge magnetoplasmons (EMPs) in the quantum Hall regime by means of time-of-flight measurement. The EMPs are injected from an Ohmic contact by applying a voltage pulse, and detected at a quantum point contact by ap
Externí odkaz:
http://arxiv.org/abs/1001.4225
Publikováno v:
Appl. Phys. Lett. 96, 032104 (2010)
We propose and demonstrate wide-band capacitance measurements on a semiconductor double-quantum dot (DQD) to study tunneling dynamics. By applying phase-tunable high-frequency signals independently to the DQD and a nearby quantum-point-contact charge
Externí odkaz:
http://arxiv.org/abs/0910.2512
Designing coherent processes is essential for developing quantum information technologies. We study coherent dynamics of two spatially separated electrons in a coupled semiconductor double quantum dot (DQD), in which various two-qubit operations are
Externí odkaz:
http://arxiv.org/abs/0905.0805
Autor:
Yamamura, Kohji, Fujimura, Shigeto, Ota, Takeshi, Ishikawa, Tetsuya, Saito, Takashi, Arai, Yoshimitsu, Shinano, Takuro
Publikováno v:
In Journal of Environmental Radioactivity December 2018 195:114-125
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