Hideaki Takayanagi
- Affiliation:
- Takayanagi Laboratory, Department of Applied Physics, Tokyo University of Science
- Specialty:
- Mesoscopic Superconductivity and Quantum Information Physics
- Academic degree:
- Ph.D. (science) The University of Tokyo, 1987
- Recent Publications
- See NIMS Researchers DB
- Home Page:
- Takayanagi Laboratory, Tokyo University of Science (in Japanese)
Education & Working History
| 2006 | Professor, Department of Applied Physics, Tokyo University of Science | ||
| 2003 | Guest Professor at the Royal Institute of Technology (Stockholm) | ||
| 2003 | - | 2006 | Guest Professor at the University of Tokyo |
| 2003 | - | 2006 | Concurrent Professor at Nanjing University (China) |
| 2003 | Director, NTT Basic Research Laboratories | ||
| 1997 | Guest Professor at Chalmers University of Technology (Sweden) | ||
| 1996 | Guest Professor at Delft University of Technology (The Netherlands) | ||
| 1991 | Research Group Leader, NTT Basic Research Laboratories | ||
| 1988 | Guest Researcher in the department of physics at UC Berkeley (one year) | ||
| 1977 | Joined Musashino Electrical Communication Laboratory, NTT | ||
| 1977 | B.S. from the University of Tokyo, Dept. of Basic Sciences |
Research History
Mesoscopic superconductivity is a novel research field, whose purpose is to analyze superconducting quantum effect in mesoscopic region. Hideaki Takayanagi marked the beginning in its research by detecting superconducting proximity effect in a junction of Nb -InAs - Nb. This was considered one of the most important findings because it provided answer to a long-debated controversial issue on existence of superconducting current under pure two-dimensional system, and it documented ability of gate potential to control maximum value of supercurrent. Control of supercurrent had eventually led to development of Josephson field effect transistor (JOFET) by him. He predicted that supercurrent of superconducting quantum point contact can be quantized and succeeded in establishing his own theory by forming split gate using the semiconductor heterostructure developed by himself. He also has been working on spintronics field using this heterostructure. He and his colleagues showed that spin-orbit interaction in the quantum well can be controlled by gate voltage. This result is considered as a milestone in this field.
In these years, he has been engaged in superconducting quantum computation research using micrometersized superconducting quantum interference device (SQUID) as quantum bit. He has observed multiphoton Rabi oscillation with different frequency microwave photons. Moreover he had successful result in measuring vacuum Rabi oscillation in flux quantum bit coupled with a LC-resonator for the first time. It not only is a significant technology for fruition of quantum computer but also made it possible to directly control quantum macroscopic system. He is gradually building up a leading role in quantum computation research. Takayanagi's work field range drastically, however, in basics he has been involved in the research of superconducting quantum effect in mesoscopic field. Such world's first-ever achievements were highly evaluated internationally and he was invited to Nobel Symposium in Sweden three times.
Selected Papers
- Quantum time-evolution in qubit readout process with a Josephson bifurcation amplifier
- Nakano H, Saito S, Semba K, Takayanagi H
- Phys Rev Lett, 2009; 102(25): 257003.
- Luminescence of a Cooper pair
- Asano Y, Suemune I, Takayanagi H, Hanamura E
- Phys Rev Lett, 2009; 103(18): 187001.
- Two-photon probe of the Jaynes-Cummings model and controlled symmetry breaking in circuit QED
- Deppe F, Mariantoni M, Menzel EP, Marx A, Saito S, Kakuyanagi K, Tanaka H, Meno T, Semba K, Takayanagi H, Solano E, Gross R
- Nature Physics, 2008; 4: 686-691.
- Vacuum Rabi oscillations in a macroscopic superconducting qubit LC oscillator system
- Johannson J, Saito S, Meno T, Nakano H, Ueda M, Semba K, Takayanagi H
- Phys Rev Lett, 2006; 96(12): 127006.
- Ferromagnetism in semiconductor dot array
- Tamura H, Shiraishi K, Takayanagi H
- Jpn J Appl Phys, 2000; 39: L241.
- Gate control of spin-orbit interaction in an inverted In0.53Ga0.47As/In0.52Al0.48As Heterostructure
- Nitta J, Akazaki T, Takayanag H, Enoki T
- Phys Rev Lett, 1997; 78(7): 1335-1338.
- AC long-range phase-coherent effects in mesoscopic superconductor—normal metal structures
- Volkov AF, Takayanagi H
- Phys Rev Lett, 1996; 76, 4026.
- Observation of maximum supercurrent quantization in a superconducting quantum point contact
- Takayanagi H, Akazaki T, Nitta J
- Phys Rev Lett, 1995; 75(19): 3533-3536.
- Mesoscopic fluctuations of the critical current in a superconductor—normal-conductor—superconductor
- Takayanagi H, Hansen JB, Nitta J
- Phys Rev Lett, 1995; 74(1): 166-169.
- Superconducting proximity effect in the native inversion layer on InAs
- Takayanagi H, Kawakami T
- Phys Rev Lett, 1985; 54(22): 2449-2452.