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

Unit Leader: Takeshi Fukuhara (D.Sci.)

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 unit, 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. 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).
  • 2. 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).
  • 3. 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).
  • 4. 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).
  • 5. 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)
  • 6. *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).
  • 7. *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).
  • 8. *Endres M., Cheneau, M., Fukuhara, T., Weitenberg, C., Schauß, P., Gross, C., Mazza, L., Bañuls, M. C., Pollet, L., Bloch, I., and Kuhr, S.:
    "Observation of Correlated Particle-Hole Pairs and String Order in Low-Dimensional Mott Insulators"
    Science 334, 200-203 (2011).
  • 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
Unit Leader

Core members

Ryuta Yamamoto
Research Scientist
Hideki Ozawa
Special Postdoctoral Researcher
Yutaro Tanaka
Student Trainee

Careers

Position Deadline
Seeking a Research Scientist or Postdoctoral Researcher (W21038) Open until filled

Contact Information

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

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