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Takeda Lab
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The lab develops optical quantum computers that harness the quantum properties of light.
AboutAbout the lab
Building computers with quanta of light.
The Takeda Lab studies optical quantum computers and their applications.
By exploiting properties unique to quanta of light, it is possible to realize quantum computers that operate at room temperature and in ambient air, with a high clock rate.
The lab is advancing the development of optical quantum computers through its own original approach, and is also exploring practical applications that use this technology.
Using quanta of light also opens up possibilities for communication and measurement that go beyond conventional technologies.
Key terms
- Optical quantum computer
- A quantum computer that computes using the quantum properties of light. It can operate at room temperature and in ambient air.
- Quantum information processing
- Technology that uses quantum properties such as superposition to handle information for computation, communication, measurement, and more.
- Optical circuit
- A system that combines components such as mirrors and beam splitters to determine the paths of light and how it is manipulated.
NewsLab news
Paper proposing and demonstrating a programmable quantum light source published on arXiv
A doctoral student received the Student Outstanding Presentation Award from the Physical Society of Japan
Paper on a method for canceling loss-induced decoherence published on arXiv
The 2026 lab introduction video has been released on a limited basis for interested students
Associate Professor Takeda received the 13th Yamato Science Award
ResearchResearch themes
The lab aims to realize quantum computers, which are attracting attention as next-generation computers, using quanta of light. While advancing the development of optical quantum computers through its own original approach, it explores practical applications that use this technology.
*Illustrative imageHybrid Optical Quantum Information Processing
Light has two aspects: a particle-like aspect, in which it can be counted as discrete units, and a wave-like aspect, in which it has amplitude and phase. By actively exploiting both in a hybrid approach, the lab pursues quantum information processing unlike anything that has existed before.
*Illustrative imageLoop-Based Optical Quantum Computers
The lab has independently devised a type of optical quantum computer with a loop structure. It can perform large-scale and diverse computations with an optical circuit of minimal size, and the lab aims for it to serve as the foundation for all kinds of optical quantum information processing.
*Illustrative imageExploring Applications of Optical Quantum Technology
Building on the original technologies it has developed, the lab is exploring ways to put technologies that exploit the quantum nature of light to use in the real world, such as simulators for quantum many-body systems, high-capacity optical communication, and ultra-high-precision sensors.
MembersFaculty
The members of the Takeda Lab consist of faculty, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorShuntaro TakedaPublications ↗
VoicesStudent voices
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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: “Laser Beam Splitter” melissa.meister from Atlanta, USA / CC BY-SA 2.0 (cropped)
- Hybrid Optical Quantum Information Processing: “Beam splitting prisms with blue laser” Nikk / CC BY 2.0 (cropped)
- Loop-Based Optical Quantum Computers: “Bobine Fibres optiques” photography taken by Christophe.Finot / CC BY-SA 3.0 (cropped)
- Exploring Applications of Optical Quantum Technology: “Closing in” Simon Whitehead from Australia / CC BY 2.0 (cropped)
- Related lab (香取・牛島研究室): “Sr-lattice-optical-atomi-clock opt” The Ye group and Brad Baxley, JILA / Public domain (cropped)
- Related lab (古澤研究室): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Related lab (塚崎研究室): “Tetrahedral amorphous carbon thin film” Daniel Schwen / CC BY-SA 3.0 (cropped)
- Related lab (山本研究室): “Dilution Fridge with Quantum Processors Enclosed 008 8K” OJB Quantum / CC BY 4.0 (cropped)
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