Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of the Physical Society of Japan

Supersolid State of Ultracold Fermions in Optical Lattice(Condensed matter: structure and mechanical and thermal properties)

Akihisa Koga, Takuji Higashiyama, Kensuke Inaba, Sei-ichiro Suga, Norio Kawakami

Published Jul 15, 2008• 0 citations
OpenAlex

Related papers

Supersolid state of ultracold fermions in optical lattice

Masahisa Koga, Akihisa Koga

•Jan 1, 2008•0 citations

Intrinsic thermalization of the honeycomb optical lattice

A. D. Barr, W. A. Furman, Max D. Porter +1 more

Ultracold atoms confined to optical lattices provide a platform for simulation of phenomena not readily accessible in condensed matter and chemical systems. One area of growing interest is the mechanism by which isolated condensed matter systems can thermalize. The mechanism for thermalization of quantum systems has been directly linked to a transition to chaos in their classical counterpart. Here we show that the broken spatial symmetries of the honeycomb optical lattice leads to a transition to chaos in the single-particle dynamics which, in turn, causes mixing of the energy bands of the quantum honeycomb lattice. For systems with single-particle chaos, "soft" interactions between atoms can cause the system to thermalize (achieve a Fermi-Dirac distribution for fermions or a Bose-Einstein distribution for bosons).

Physical review. E•Apr 24, 2023•2 citations

Superfluid properties of ultracold fermionic atoms in two-dimensional optical lattices

Masahisa Koga, Akihisa Koga

•Jan 1, 2010•0 citations

Supersolid State of Ultracold Fermions in Optical Lattice

Akihisa Koga, Takuji Higashiyama, Kensuke Inaba +2 more

We study ultracold fermionic atoms trapped in an optical lattice with harmonic confinement by means of the dynamical mean-field approximation. It is demonstrated that a supersolid state, where an s-wave superfluid coexists with a density-wave state with a checkerboard pattern, is stabilized by attractive onsite interactions on a square lattice. Our new finding here is that a confining potential plays an invaluable role in stabilizing the supersolid state. We establish a rich phase diagram at low temperatures, which clearly shows how the insulator, the density wave and the superfluid compete with each other to produce an intriguing domain structure. Our results shed light on the possibility of the supersolid state in fermionic optical lattice systems.

arXiv:0804.1547•Journal of the Physical Society of Japan•Jun 26, 2008•39 citations

Superfluid-Mott Insulator Transition of Spin-1 Bosons in Optical Lattice under Magnetic Field(Condensed matter: structure and mechanical and thermal properties)

T. Kimura, Shunji Tsuchiya, Makoto Yamashita +1 more

Journal of the Physical Society of Japan•Jul 15, 2006•0 citations

Superfluidity of Ultracold Fermions in an Optical Lattice

J. K. Chin, David E. Miller, Yingmei Liu +5 more

•Jul 3, 2006•2 citations
Ultracold atoms confined to optical lattices provide a platform for simulation of phenomena not readily accessible in condensed matter and chemical systems. One area of growing interest is the mechanism by which isolated condensed matter systems can thermalize. The mechanism for thermalization of quantum systems has been directly linked to a transition to chaos in their classical counterpart. Here we show that the broken spatial symmetries of the honeycomb optical lattice leads to a transition to chaos in the single-particle dynamics which, in turn, causes mixing of the energy bands of the quantum honeycomb lattice. For systems with single-particle chaos, "soft" interactions between atoms can cause the system to thermalize (achieve a Fermi-Dirac distribution for fermions or a Bose-Einstein distribution for bosons).
We study ultracold fermionic atoms trapped in an optical lattice with harmonic confinement by means of the dynamical mean-field approximation. It is demonstrated that a supersolid state, where an s-wave superfluid coexists with a density-wave state with a checkerboard pattern, is stabilized by attractive onsite interactions on a square lattice. Our new finding here is that a confining potential plays an invaluable role in stabilizing the supersolid state. We establish a rich phase diagram at low temperatures, which clearly shows how the insulator, the density wave and the superfluid compete with each other to produce an intriguing domain structure. Our results shed light on the possibility of the supersolid state in fermionic optical lattice systems.