RIKEN Center for Emergent Matter Science Quantum Many-Body Dynamics Research Unit

Unit Leader: Takeshi Fukuhara (Ph.D.)

Japanese Page

Research Summary

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.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).

Recent Research Results

Sep. 25, 2015
Entangled atoms

Lab Members

Principal investigator

Takeshi Fukuhara: Unit Leader

Core members

Ippei Nakamura: Postdoctoral Researcher
Ryuta Yamamoto: Special Postdoctoral Researcher
Hideki Ozawa: Special Postdoctoral Researcher
David Can Nak: Student Trainee

Careers

Position	Deadline
Seeking a Postdoctoral Researcher (W19302)	Open until filled

Contact Information

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