Superconducting Quantum Simulation Research Team

Principal Investigator

PI Name Jaw Shen Tsai
Degree Ph.D.
Title Team Leader
Brief Resume
1983Ph.D., State University of New York at Stony Brook, USA
1983Research Scientist, Microelectronics Research Laboratories, NEC
2000Fellow, American Physical Society, USA
2001Fellow, Nano Electronics Research Laboratories, NEC
2001Team Leader, Macroscopic Quantum Coherence Team, RIKEN
2012Group Director, Single Quantum Dynamics Research Group, RIKEN
2012Team Leader, Macroscopic Quantum Coherence Research Team, Quantum Information Electronics Division, RIKEN Center for Emergent Matter Science
2014Team Leader, Superconducting Quantum Simulation Research Team, Quantum Information Electronics Division, RIKEN Center for Emergent Matter Science (-present)
2015Professor, Tokyo University of Science
2020Team Leader, Superconducting Quantum Simulation Research Team, Quantum Computing Division, RIKEN Center for Emergent Matter Science (-present)

Outline

We are studying macroscopic quantum coherence that occurs in small Josephson junction circuits. In the system, charge and phase degrees of freedoms co-exist, and their coherent control can be exploited as quantum bit (qubit), the basic component of the quantum computer. Superconducting qubit possesses high degree of freedoms in the circuit design and ability to local control as well as readout quantum states. Utilizing these properties, the development of small scale quantum simulation circuit and quantum annealing circuit are targeted.

Research Fields

Physics, Engineering

Keywords

Superconductivity
Josephson effect
Quantum coherence
Qubit
Artificial atoms

Results

Integrated Superconducting chip enabling 2D packaging

A 16-bit superconducting quantum chip was designed and fabricated. It was based on new architecture compatible with surface-code universal quantum computer. The new architecture solves the wiring problem of superconducting quantum computer where qubits internal to a chip-set become inaccessible for external control/readout lines. It is a modified superconducting scalable micro-architecture that only requires a completely planar design.

The inter-qubit connections are realized by a novel pseudo-2D resonator network containing airbridges. A new Omon type superconducting qubit was developed.

A novel architecture for one-way superconducting quantum computer was also developed.

Photograph of 16-qubit superconducting quantum chip.

Publications

  1. Z. H. Peng, S. E. de Graaf, J. S. Tsai, and O. V. Astafiev

    Tuneable on-demand single-photon source in the microwave range

    Nat. Commun. 7, 12588 (2016)

Articles

お問い合わせ

2-1 Hirosawa, Wako, Saitama 351-0198 Japan

E-mail:
tsai[at]riken.jp

Links