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Paper Abstract and Keywords
Presentation 2013-11-19 11:00
[Invited Talk] Macroscopic quantum hybrid system
Koichi Semba (NICT/NII/NTT)
Abstract (in Japanese) (See Japanese page) 
(in English) Atomic and molecular systems are intriguing candidates for quantum device as they demonstrated very long coherence times. One such particular system, an electron-spin nitrogen-vacancy color center in diamond, is a natural candidate to act as a quantum memory for superconducting qubits, because of their natural energy splitting compatible with flux-qubits in addition to the long coherence times. We have demonstrated a gap-tunable flux-qubit is able to coherently exchange a single quantum of energy with a macroscopic ensemble consisting of approximately 3E7 NV－ spins. This strong coupling which is enhanced more than three orders of magnitude with the large collective coupling is essential to understand the physics of the macroscopic quantum hybrid systems: the fast gate operation in supreconducting qubits and the long coherence memory time in natural atoms. In this talk, I would like to introduce relevant experiments in this field and our recent results.
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Conference Information
Committee QIT  
Conference Date 2013-11-18 - 2013-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Waseda Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2013-11-QIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Macroscopic quantum hybrid system 
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1st Author's Name Koichi Semba  
1st Author's Affiliation National Institute of Information and Communications Technology/National Institute of Informatics/NTT (NICT/NII/NTT)
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Date Time 2013-11-19 11:00:00 
Presentation Time 40 minutes 
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