Symmetry-protected fractional Chern insulators and fractional topological insulators
نویسندگان
چکیده
منابع مشابه
Floquet fractional Chern insulators.
We show theoretically that periodically driven systems with short range Hubbard interactions offer a feasible platform to experimentally realize fractional Chern insulator states. We exemplify the procedure for both the driven honeycomb and the square lattice, where we derive the effective steady state band structure of the driven system by using the Floquet theory and subsequently study the in...
متن کاملRealizing Fractional Chern Insulators with Dipolar Spins
N. Y. Yao1†∗, A. V. Gorshkov2†, C. R. Laumann1,3†, A. M. Läuchli, J. Ye, M. D. Lukin Physics Department, Harvard University, Cambridge, MA 02138, U.S.A. Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125, U.S.A. ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, U.S.A. Institute for Theoretical Physics, University of Innsbr...
متن کاملRealizing fractional Chern insulators in dipolar spin systems.
Strongly correlated quantum systems can exhibit exotic behavior controlled by topology. We predict that the ν = 1/2 fractional Chern insulator arises naturally in a two-dimensional array of driven, dipolar-interacting spins. As a specific implementation, we analyze how to prepare and detect synthetic gauge potentials for the rotational excitations of ultracold polar molecules trapped in a deep ...
متن کاملFractional S-duality, Classification of Fractional Topological Insulators and Surface Topological Order
In this paper, we propose a generalization of the S-duality of four-dimensional quantum electrodynamics (QED 4 ) to QED 4 with fractionally charged excitations, the fractional S-duality. Such QED 4 can be obtained by gauging the U(1) symmetry of a topologically ordered state with fractional charges. When time-reversal symmetry is imposed, the axion angle (θ) can take a nontrivial but still time...
متن کاملSymmetry protected Josephson supercurrents in three-dimensional topological insulators.
Coupling the surface state of a topological insulator to an s-wave superconductor is predicted to produce the long-sought Majorana quasiparticle excitations. However, superconductivity has not been measured in surface states when the bulk charge carriers are fully depleted, that is, in the true topological regime relevant for investigating Majorana modes. Here we report measurements of d.c. Jos...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2012
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.85.165134