Topological bands with a Chern numberC=2by dipolar exchange interactions
نویسندگان
چکیده
منابع مشابه
Topological flat bands from dipolar spin systems.
We propose and analyze a physical system that naturally admits two-dimensional topological nearly flat bands. Our approach utilizes an array of three-level dipoles (effective S=1 spins) driven by inhomogeneous electromagnetic fields. The dipolar interactions produce arbitrary uniform background gauge fields for an effective collection of conserved hard-core bosons, namely, the dressed spin flip...
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We present a class of states with both topological and conventional Landau order that arise out of strongly interacting spinless fermions in fractionally filled and topologically nontrivial bands with Chern number C=±1. These quantum states show the features of fractional Chern insulators, such as fractional Hall conductivity and interchange of ground-state levels upon insertion of a magnetic f...
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Stefan K. Baur,1 Monika H. Schleier-Smith,2,3,4 and Nigel R. Cooper1,3 1T.C.M. Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom 2Department of Physics, Stanford University, Stanford, California 94305, USA 3Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstrasse 4, 80799 München, Germany 4Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. ...
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A three-level atomicmedium can bemade transparent to a resonant probe field in the presence of a strong control field acting on an adjacent atomic transition to a long-lived state, which can be represented by a highly excited Rydberg state. The long-range interactions between theRydberg state atoms then translate into strong, non-local, dispersive or absorptive interactions between the probe ph...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2015
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.91.053617