LAB LOGA page on LabLog, a review site (not the lab's official page)
Yoshihara Lab
Machine-translated · View original
The lab studies and freely controls quantum states in superconducting electrical circuits.
AboutAbout the lab
Quantum states in cryogenic circuits
Yoshihara Lab studies the quantum states that appear when superconducting electrical circuits are placed in an extremely low-temperature, ultralow-noise environment.
These circuits are called superconducting quantum circuits, and the lab aims to freely control the states unique to quantum mechanics that appear on them.
The ultimate goal is to realize a superconducting quantum computer using superconducting quantum circuits.
The lab can carry out everything in-house, from circuit design and fabrication to measurement at extremely low temperatures and data analysis.
Key terms
- Superconducting quantum circuit
- A circuit in which a superconducting electrical circuit is placed in an extremely low-temperature, ultralow-noise environment so that states unique to quantum mechanics appear.
- Superconducting qubit
- A circuit in which a superposition of clockwise and counterclockwise currents appears in a superconducting loop.
- Dilution refrigerator
- A device that cools superconducting quantum circuits to extremely low temperatures of around 10 mK. It is the main instrument of this lab.
NewsLab news
A doctoral student won a poster award at Quantum Summer School 2026
A paper co-authored with Cai Lab was published in Journal of the Physical Society of Japan
A paper co-authored with Cai Lab was published in Nature Communications
A paper by Prof. Yoshihara and colleagues was published in Physical Review A
ResearchResearch themes
In the microscopic world at the atomic level, states unique to quantum mechanics, such as superposition and entanglement, appear that are far removed from the common sense of classical physics. Superconducting electrical circuits likewise show states unique to quantum mechanics when placed in an extremely low-temperature, ultralow-noise environment, and Yoshihara Lab aims to freely control the states on these superconducting quantum circuits.
*Illustrative imageMacroscopic quantum systems
In an extremely low-temperature, ultralow-noise environment, a superconducting qubit enters a superposition of clockwise and counterclockwise current. It is more than 10,000 times larger than a hydrogen atom. Superconducting quantum circuits are called macroscopic quantum systems and are the main research subject of the lab.
*Illustrative imageRealizing a superconducting quantum computer
The ultimate goal is to realize a superconducting quantum computer using superconducting quantum circuits. Realizing it requires research and development on many elemental technologies, and the lab works hard to produce results that can grow into core technologies.
*Illustrative imageThe research workflow from design to measurement
The lab designs circuits by combining superconducting qubits and other elements, fabricates them in a cleanroom, and cools them to extremely low temperatures with a dilution refrigerator. It controls and reads out quantum states with microwave signals and handles everything through data analysis.
MembersFaculty
The members of Yoshihara Lab are faculty members, doctoral students, master's students, and undergraduate students.As of 2026
- ProfessorFumiki Yoshihara
VoicesStudent voices
Ratings and reviews reflect the experiences of individual current or former students, not the lab's official views. Whether a lab has reviews, or how many, says nothing about the lab itself.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
Student ratings (0 students)
--
--
--
--
--
--
Student voices answer questions like these
- What's great about this lab?
- What did you learn after joining?
- What's the vibe, and what is the professor like?
- Who is this lab for?
- Where do graduates go?
Your experience can help younger students choose their lab. Your name won't be shown.
Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Yoshihara Lab
Nikuni LabFaculty of Science Division I, Department of PhysicsAtomic and molecular physics, quantum electronics
Sanaka LabFaculty of Science Division I, Department of PhysicsAtomic and molecular physics, quantum electronics
Nagata LabFaculty of Science Division II, Department of PhysicsAtomic and molecular physics, quantum electronicsThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Floor Standing Cryostat with DR Insert” OJB Quantum / CC BY 4.0 (cropped)
- Macroscopic quantum systems: “Superconducting Quantum Chip with Dispersive Background 2” OJB Quantum / CC BY 4.0 (cropped)
- Realizing a superconducting quantum computer: “Wire Bonded Superconducting Quantum Chip with 6 Transmons 002” OJB Quantum / CC BY 4.0 (cropped)
- The research workflow from design to measurement: “Gold Cryostat 8K-4” Onri Jay Benally / CC BY-SA 2.0 (cropped)
- Related lab (二国研究室): “Bose-Einstein Condensate (BEC) ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (佐中研究室): “Laser 01” Vislupus / CC BY-SA 4.0 (cropped)
- Related lab (永田研究室): “CERN Antimatter factory - Alpha experiment” Suaudeau / CC BY-SA 4.0 (cropped)
About LabLog
LabLog is a lab review app for students only. Student members at each university interview students in labs and publish what they say. Student voices can only be read by students who sign up with a university email address. Operated by bestiee Inc.
Learn more about LabLog ↗Search engines and AI may reference the basic lab info and rating summaries on this page and the description of LabLog. Student voices are for student members only. Automated collection by programs (scraping, or input to or training of AI) is prohibited under Article 8 of the Terms of Service. If you need data for research or analysis, please contact us.