2011 Fiscal Year Final Research Report
Observations of quantum entangled states and quantum critical behavior by using a precise probing method of microwave near-field
| Project/Area Number |
21200035
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Applied materials science/Crystal engineering
Microdevices/Nanodevices
|
|---|
| 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
|
| 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 |
|---|
| 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.
|
