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Fundamental Theory of Condensed Matter: Quantum Information Lab
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A theory lab that creates new kinds of information processing using the strange properties of quantum physics.
AboutAbout the lab
Turning quantum strangeness into the power of information processing.
Fundamental Theory of Condensed Matter: Quantum Information (the Morimae Lab) studies the theory of quantum information, which uses strange properties of quantum theory, such as superposition and the uncertainty principle, to realize forms of information processing never possible before.
Its main themes are quantum computational complexity theory, which investigates the boundaries and limits between quantum and classical computation, and new quantum cryptography that makes use of quantum properties.
Key terms
- Quantum cryptography
- Research on building cryptographic mechanisms, such as communication that cannot be eavesdropped on, by using quantum properties
- One-way function
- A function that is easy to compute but extremely hard to invert from its output. A foundation of cryptography
- Quantum supremacy
- The ability of a quantum computer to perform computations that classical computers cannot efficiently simulate
ResearchResearch themes
The lab studies quantum information, which makes clever use of the strange phenomena of quantum theory to achieve high-performance information processing never possible before. It works on quantum computational complexity theory, quantum cryptography, and quantum algorithms.
*Illustrative imageLimits of Quantum Computation and Quantum Supremacy
From the viewpoint of computational complexity theory, the lab studies the boundary between quantum and classical computation and the limits of quantum computation. It works on the theory of quantum supremacy, which holds that even restricted, weak models of quantum computation cannot be efficiently simulated by classical computers.
*Illustrative imageQuantum Cryptographic Protocols
The lab designs quantum cryptographic protocols with new cryptographic functions that classical information processing alone cannot provide. It has studied blind quantum computation, verification of quantum computation, quantum zero-knowledge proofs, and more.
*Illustrative imageQuantum Cryptography Without One-Way Functions
In classical cryptography, one-way functions are the most fundamental primitive, but in the quantum world this classification changes significantly. Focusing on pseudorandom quantum states, the lab has shown the possibility of constructing commitments and digital signatures even without one-way functions.
MembersFaculty
- ProfessorTomoyuki Morimae
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: “SpheredeBloch” Cf nmr / CC BY-SA 3.0 (cropped)
- Limits of Quantum Computation and Quantum Supremacy: “IBM Quantum System One” OJB Quantum / CC BY 4.0 (cropped)
- Quantum Cryptographic Protocols: “Three stage quantum cryptography protocol” Gauntman1 / CC BY-SA 3.0 (cropped)
- Quantum Cryptography Without One-Way Functions: “Quantum position-verification spacetime setting” Alexmay28 / CC0 (cropped)
- Related lab (Condensed Matter Physics Lab): “FQHE Hall” Jakubtr / CC BY-SA 3.0 (cropped)
- Related lab (Statistical Dynamics Lab): “Angleofrepose” Captain Sprite at English Wikipedia / CC BY-SA 2.5 (cropped)
- Related lab (Actuarial Science Division): “Skyscrapers in Marunouchi, Tokyo” DXR / CC BY-SA 4.0 (cropped)
- Related lab (Particle Theory Lab (Yukawa Institute for Theoretical Physics)): “AdSE like hyp” Anton Sel / CC BY-SA 4.0 (cropped)
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