Centers & Labs

RIKEN Center for Emergent Matter Science

Quantum Many-Body Dynamics Research Unit

Unit Leader: Takeshi Fukuhara (Ph.D.)
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 Field

Interdisciplinary science and 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. Phuc, N. T., Momoi, T., Furukawa, S., Kawaguchi, Y., Fukuhara, T., and Ueda, M.:
    "Geometrically frustrated coarsening dynamics in spinor Bose-Fermi mixtures"
    Phys. Rev. A 95, 013620 (2017).
  2. 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"
    Phys. Rev. Lett. 115, 035302 (2015).
  3. *Schauβ, P., Zeiher J., Fukuhara, T., Hild, S., Cheneau, M., Macrì, T., Pohl, T., Bloch, I., and Gross, C.:
    "Crystallization in Ising quantum magnets"
    Science 347, 1455-1458 (2015).
  4. *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).
  5. *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 Phys. 9, 235-241 (2013).
  6. *Endres M., Fukuhara, T., Pekker, D., Cheneau, M., Schauß, P., Gross, C., Demler, E., Kuhr, S., and Bloch, I.:
    "The ‘Higgs’ Amplitude Mode at the Two-Dimensional Superfluid/Mott Insulator Transition"
    Nature 487, 454-458 (2012).
  7. *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).
  8. *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).
  9. *Fukuhara, T., Sugawa, S., Sugimoto, M., Taie, S., and Takahashi, Y.:
    "Mott insulator of ultracold alkaline-earth-metal-like atoms"
    Phys. Rev. A 79, 041604(R) (2009).
  10. *Fukuhara, T., Takasu, Y., Kumakura, M., and Takahashi, Y.:
    "Degenerate Fermi Gases of Ytterbium"
    Phys. Rev. Lett. 98, 030401 (2007).

Lab Members

Principal Investigator

Takeshi Fukuhara
Unit Leader

Core Members

Ippei Nakamura
Postdoctoral Researcher
Ryuta Yamamoto
Special Postdoctoral Researcher

Contact information

Laser Science Laboratory, 2-1 Hirosawa, Wako, Saitama
351-0198, Japan

Email: takeshi.fukuhara [at] riken.jp

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