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RIKEN Center for Quantum Computing Quantum Many-Body Dynamics Research Team

Team Leader: Takeshi Fukuhara (D.Sc.)

Research Summary

Takeshi  Fukuhara(Ph.D.)

Modern technology has been progressed based on understanding of quantum many-body systems. In addition to the conventional study of equilibrium states, non-equilibrium dynamics plays an important role in developing further intriguing materials and advancing quantum information processing technology. In this research team, we investigate non-equilibrium dynamics of quantum many-body systems using ultracold atomic gases. Advantages of ultracold-atom experiments are simplicity and excellent controllability of the parameters, including dimensions, of the systems. Especially, a quantum gas loaded into periodic potential generated by a laser (optical lattice) can mimic fundamental models in the strongly correlated physics, and it can be used as a platform for quantum information processing. Utilizing such systems, we investigate real-time and real-space dynamics, and also control the many-body dynamics.

Main Research Fields

  • Interdisciplinary Science & Engineering

Related Research Fields

  • Engineering

Keywords

  • Quantum information
  • Quantum simulation
  • Quantum dynamics
  • Cold atoms
  • Optical lattice

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. Ozawa, H., Yamamoto, R., and Fukuhara T.:
    "Observation of chiral-mode domains in a frustrated XY model on optical triangular lattices"
    Physical Review Research 5, L042026 (2023).
  • 2. Yamamoto, R., Ozawa, H., Nak, D. C., Nakamura, I., and Fukuhara, T.:
    "Single-site-resolved imaging of ultracold atoms in a triangular optical lattice"
    New Journal of Physics 22, 123028 (2020).
  • 3. Schäfer, F., Fukuhara, T., Sugawa, S., Takasu, Y., and Takahashi, Y.:
    "Tools for quantum simulation with ultracold atoms in optical lattices"
    Nature Reviews Physics 2, 411-425 (2020).
  • 4. Yamamoto, D., Fukuhara, T., and Danshita, I.:
    "Frustrated quantum magnetism with Bose gases in triangular optical lattices at negative absolute temperatures"
    Communications Physics 3, 56 (2020).
  • 5. Nakamura, I., Kanemura, A., Nakaso, T., Yamamoto, R., and Fukuhara, T.:
    "Non-standard trajectories found by machine learning for evaporative cooling of 87Rb atoms"
    Optics Express 27, 20435-20443 (2019).
  • 6. Fukuhara, T., Hild, S., Zeiher J., Schauβ, P., Bloch, I., Endres, M., and Gross, C.:
    "Spatially Resolved Detection of a Spin-Entanglement Wave in a Bose-Hubbard Chain"
    Physical Review Letters 115, 035302 (2015)
  • 7. *Fukuhara, T., Schauß, P., Endres M., Hild, S., Cheneau, M., Bloch, I., and Gross, C.:
    "Microscopic observation of magnon bound states and their dynamics"
    Nature 502, 76-79 (2013).
  • 8. *Fukuhara, T., Kantian, A., Endres, M., Cheneau, M., Schauß, P., Hild, S., Bellem, D., Schollwöck, U., Giamarchi, T., Gross, C., Bloch, I., and Kuhr, S.:
    "Quantum dynamics of a mobile spin impurity"
    Nature Physics 9, 235-241 (2013).
  • 9. *Weitenberg, C., Endres M., Sherson, J. F., Cheneau, M., Schauß, P., Fukuhara, T., Bloch, I., and Kuhr, S.:
    "Single-Spin Addressing in an Atomic Mott Insulator"
    Nature 471, 319-324 (2011).
  • 10. *Fukuhara, T., Takasu, Y., Kumakura, M., and Takahashi, Y.:
    "Degenerate Fermi Gases of Ytterbium"
    Physical Review Letters 98, 030401 (2007).

Recent Research Results

Related Links

Lab Members

Principal investigator

Takeshi Fukuhara
Team Leader

Core members

Ryuta Yamamoto
Research Scientist
Yoichiro Otsuka
Technical Staff I
Hideki Ozawa
Visiting Scientist
Daisuke Yamamoto
Visiting Scientist

Careers

Position Deadline
Seeking a few Research Scientists or Postdoctoral Researchers (W24217) Open until filled
Seeking a few Research Scientists or Postdoctoral Researchers (W24216) Open until filled

Contact Information

Laser Science Laboratory, 2-1 Hirosawa, Wako, Saitama
351-0198, Japan
Email: takeshi.fukuhara@riken.jp

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