17 October 2023

Japan-made Quantum Computer Open to the Public!
@ Osaka University’s Machikane Festival
Friday 3 November 10:00am-5:00pm @ Osaka University, Toyonaka Campus

OutlineOn Friday 3 November 2023 between 10:00am-5:00pm Japan’s third quantum computer1, which isprimarily being developed by QIQB, will be opened to the public.
The event will start at 10:00am with the opening of the freezer. At 11:00am, there will be ademonstration involving the replacement of qubit chips provided by RIKEN. The entire process will
be open to the public. From 10.30am onwards, there will be 15-minute presentation every hour
introducing the quantum computer.
There will be an overview in English at 2.30pm.

Outline of the event
Date and time: Friday 3 November 10:00am - 5:00pm
Venue: Graduate School of Engineering Science J Building Room B07,
Toyonaka Campus, Osaka University
Target audience: Machikane Festival attendees
QIQB Presenters:
・Makoto Negoro (QIQB Deputy Director, Associate Professor)
・Hidehisa Shiomi (Specially Appointed Associate Professor,QIQB)・Kazuhisa Ogawa (Lecturer, QIQB)QIQB Laboratory (taken in 2022)

BackgroundOn 27 March 2023, Japan’s first quantum computer went into operation at RIKEN. It uses
superconducting qubit (quantum bit) chips2. The computer is controlled by microwave pulses undercommands from quantum software via the cloud. QIQB developed the microwave control
equipment and cloud software.
On 5 October 2023, Fujitsu and RIKEN announced the successful development of a second
quantum computer. QIQB has been building a testbed for the development of quantum software,
cloud software and control equipment, with test chips provided by RIKEN.
In the future, QIQB is planning to open the cloud to the public as the third Japan-made quantum
computer. When QIQB opens its laboratory to the public during the festival, there will be ademonstration of the chip exchange and wiring changes necessary for this purpose. QIQB's

quantum computer is characterized by the fact that, with the exception of the dilution refrigerator
and a few low-temperature microwave components, most components (low-temperature microwave
cables, low-temperature amplifiers, low-noise power supplies, magnetic shielding, chip packages,
control units, superconducting amplifiers, superconducting cables, quantum bit chips, etc.) aremade in Japan. The production of these components has recently been completed. In the future,
QIQB will show that domestically produced components can perform as a cloud quantum computer.

Event details＜Program＞
10:00 Opening of the refrigeration system
10:30 Overview of quantum computers
10:45 Q&A session
11:00 Replacement of quantum bit chips, etc.
11:30 Overview of quantum computers (15 min)12:30 Overview of quantum computers (15 min)
13:30 Overview of quantum computers (15 min)
14:30 Overview (in English) of quantum computers (15 mins)
15:30 Overview of quantum computers (15 mins)
16:30 Overview of quantum computers (15 mins)
17:00 Conclusion
Makoto Negoro (Deputy Director and Associate Professor, QIQB), Hidehisa Shiomi (SpeciallyAppointed Associate Professor, QIQB) or Kazuhisa Ogawa (Lecturer, QIQB) will be available ateach presentation session. Outside of the presentation times, an introductory video about QIQB will
be shown. If you wish to visit or film QIQB, please ask the staff in advance.
The introductory presentation on quantum computers will discuss how quantum computers work,
how superconducting qubits work, their components, where quantum computers can be applied
and the latest research at QIQB.
This project is funded by the JST Program on Open innovation Platforms for Industry-academia CoCreation (CI-NEXT) "Quantum Software Research Hub".

Keywords※1 Quantum computer
A computer that performs calculations using qubit (quantum bit) which operates according to theprinciples of quantum mechanics, as the fundamental unit of information. By utilizing quantum
superposition and quantum entanglement, which do not exist in conventional computers, it isexpected to be able to efficiently simulate quantum behavior such as electronic states in moleculesand solve various problems such as machine learning and prime factorization at high speed.

※2 Superconducting qubits

A quantum computer scheme in which a qubit is realized by using an element called a Josephson
junction on an electronic circuit made of superconducting materials. As the scale of the energy
difference between '0' and '1' in a qubit is so small that it resonates with electromagnetic waves in
the microwave band, it must be cooled to a cryogenic temperature of about 10mK (about -273°C) ina dilution refrigerator to suppress thermal noise.

Contact
For enquiries regarding this press release, please contact:
Centre for Quantum Information and Biology, Osaka University
Associate Professor and Deputy Director Makoto Negoro
Tel: 06-6850-8035
E-mail: negoro.sec@qiqb.osaka-u.ac.jp
http://negoro.qiqb.osaka-u.ac.jp