Observations of quantum entangled states and quantum critical behavior by using a precise probing method of microwave near-field
Project/Area Number |
21200035
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Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
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Allocation Type | Single-year Grants |
Research Field |
Applied materials science/Crystal engineering
Microdevices/Nanodevices
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Research Institution | Aoyama Gakuin University |
Principal Investigator |
|
Co-Investigator(Renkei-kenkyūsha) |
SASAKI Takahiko 東北大学, 金属材料研究所, 教授 (20241565)
|
Project Period (FY) |
2009 – 2011
|
Project Status |
Completed (Fiscal Year 2011)
|
Budget Amount *help |
¥30,940,000 (Direct Cost: ¥23,800,000、Indirect Cost: ¥7,140,000)
Fiscal Year 2011: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2010: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2009: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
|
Keywords | 超伝導体 / 量子もつれ合い / マイクロ波 / 空洞共振器 / 量子相転移 / 超伝導材料・素子 / マイクロ波近接場 / ジョセフソン接合 / ジョセブソン接合 |
Research Abstract |
Quantum entangled states become essentially important in both regions of condensed matter physics and quantum information technology. Toward a complete understanding of such states, we study the development of a microwave microscope to probe the quantum critical behavior in the neighborhood of quantum critical point, and the design of a superconducting cavity resonator to investigate the quantum entangled states generated by using a quantum electrodynamics theory. We found that a spatial resolution of the microwave microscope is strongly enhanced by utilizing a microwave near-field, which is realized by the insertion of a metallic needle into a cavity resonator. We also found that such an insertion of the metallic needle is useful for a precise control of the coupling constant between the Josephson quantum bits and the microwave photons at low temperatures, which is required to create the quantum entangled states.
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Report
(4 results)
Research Products
(8 results)