Yasunobu Nakamura
University of Tokyo
255 Papers
1K Citations
Yasunobu Nakamura is an academic researcher from University of Tokyo. The author has contributed to research in topics: Qubit & Flux qubit. The author has an hindex of 55, co-authored 238 publications. Previous affiliations of Yasunobu Nakamura include NEC & Keio University.
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Papers
Patent
Coupled superconducting charge quantum bit device and controlled-not gate using the same
Tsuyoshi Yamamoto,Yasunobu Nakamura,Jaw-Shen Tsai +2 more
- 04 Aug 2004
TL;DR: In this paper, a control and a target quantum bit circuit are coupled by a box-electrode coupling capacitor, and a gate electrode is coupled to the quantum box electrode through a gate capacitor.
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Cavity optomechanics with surface acoustic waves
Ayato Okada,Fumikazu Oguro,Atsushi Noguchi,Yutaka Tabuchi,Rekishu Yamazaki,Koji Usami,Yasunobu Nakamura +6 more
TL;DR: In this paper, an electro-optomechanical system based on a surface acoustic wave (SAW), where a piezoelectric material with a large optoelastic susceptibility is used for the coupling of both a radio wave and optical light to the SAW, is presented.
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Global relaxation of superconducting qubits
TL;DR: In this article, coupled quantum two-state systems (qubits) exposed to a global relaxation process are considered and a scheme for how these effects can be experimentally accessed in superconducting flux qubits and, possibly, used in constructing long-lived entangled states.
•Journal Article
Dressed-state engineering for continuous detection of itinerant microwave photons
Kazuki Koshino,Zhirong Lin,Kunihiro Inomata,Tsuyoshi Yamamoto,Yasunobu Nakamura,Yasunobu Nakamura +5 more
TL;DR: In this paper, a superconducting qubit is coupled dispersively to two resonators, one is used to form an impedance-matched $\mathrm{\ensuremath{\Lambda}}$ system that deterministically captures incoming photons, and the other is used for continuous monitoring of the event.
Anomalous vortex penetrations into square superconducting networks
Yuji Tsuchiya,Yasuyuki Nakajima,Tsuyoshi Tamegai,T. Yamamoto,Yasunobu Nakamura,Jaw-Shen Tsai,Mutsuo Hidaka,Hirotaka Terai,Zhen Wang +8 more
TL;DR: In this paper, the authors have observed vortex motion in superconducting networks with relatively large holes and they have shown that the diagonal vortex penetration can be explained by the enhancement of flux density near the vertices of square holes.
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