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Condensed Matter Quantum Computing Lab
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The lab studies electron correlations in quasicrystals and quantum algorithms.
AboutAbout the lab
Linking the electrons of aperiodic crystals with quantum computation
The Condensed Matter Quantum Computing Lab studies electron correlations in quasicrystals, as well as the development and use of quantum algorithms from a condensed matter perspective.
A quasicrystal is an aperiodic crystal that lacks translational symmetry and has unconventional point-group symmetry, such as five-fold rotational symmetry.
A quantum algorithm is an algorithm designed for quantum computers.
A quantum computer is a new type of computer that performs computation using the principles of quantum mechanics.
Key terms
- Quasicrystal
- A crystal that lacks translational symmetry and has unconventional point-group symmetry, such as five-fold rotational symmetry. Also called an aperiodic crystal.
- Translational symmetry
- The property of a crystal whereby, when shifted in position, it overlaps with itself in the same arrangement.
- Reduced density matrix
- A matrix that represents information about a small number of particles, extracted from the state of a quantum many-body system. Abbreviated as RDM.
NewsLab news
A student received the School of Science Award
Associate Professor Nayuta Ueda was selected for JPCM's “Emerging Leaders 2024/25”
The Condensed Matter Quantum Computing Lab was launched
ResearchResearch themes
The lab works on electron correlations in quasicrystals and on the development and use of quantum algorithms from a condensed matter perspective. It theoretically investigates electron correlations in crystals without translational symmetry, and also studies how to handle condensed matter physics problems on quantum computers.
*Illustrative imageElectron Correlations in Quasicrystals
To treat correlation effects in quasicrystals, which lack translational symmetry, the lab proposed and applied real-space dynamical mean-field theory. In superconducting quasicrystals, it has found that Cooper pairs with finite center-of-mass momentum appear.
*Illustrative imageQuantum Algorithms for Condensed Matter Physics
The lab works on improving the evaluation of reduced density matrices (RDMs), which are important in quantum many-body systems, and has proposed a method that efficiently reconstructs higher-order RDMs using the fermionic shadow method. It also applies methods from condensed matter physics to quantum chemistry.
MembersFaculty
The members of the Condensed Matter Quantum Computing Lab consist of faculty, students in the doctoral program, master's program, and undergraduate program, interns, and secretaries.As of 2026
- Associate ProfessorNayuta Ueda
- Project Assistant ProfessorRyu Takakura
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: “Quasicrystal1” J.W. Evans, The Ames Laboratory, US Department of Energy / Public domain (cropped)
- Electron Correlations in Quasicrystals: “Ho-Mg-ZnQuasicrystal” AMES lab., US Department of Energy / Public domain (cropped)
- Quantum Algorithms for Condensed Matter Physics: “Atomic nucleus simulated on a quantum computer” OLCF / CC BY 2.0 (cropped)
- Related lab (Nuclear Matter Subgroup (Experimental Nuclear Physics) Lab): “PRIME lab Van de Graaff accelerator” Patrick Finnegan / CC BY 2.0 (cropped)
- Related lab (Nuclear Experiment, Nuclear Matter Subgroup (Fukuda) Lab): “VEP-1 collider” Eto shorcy / CC BY-SA 3.0 (cropped)
- Related lab (Asano Lab): “Wafer with Pentium chips” Naotake Murayama from Los Altos, CA, USA / CC BY 2.0 (cropped)
- Related lab (Kuroki Lab): “Α-Samarium crystal structure” Forbes72 / CC BY-SA 4.0 (cropped)
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