Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 110, Issue 17, Pages 6736-6741Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1300170110
Keywords
optical lattices; degenerate atomic gases; quantum Hall effects; chiral edge states
Categories
Funding
- Fonds de la Recherche Scientifique (FNRS Belgium)
- Agence Nationale de la Recherche (ANR) via the project AGAFON (Artificial gauge fields on neutral atoms)
- European Research Council (ERC) project Quantum Gauge Theories and Ultracold Atoms (QUAGATUA)
- Emergences program (Ville de Paris and Universite Pierre et Marie Curie)
- ERC
- integrated project AQUTE
- Austrian Science Fund through Spezialforschungsbereich (SFB) [F40 FOQUS]
- Defense Advanced Research Projects Agency (DARPA) Optical Lattice Emulator (OLE) program
- National Science Foundation (NSF) through the Physics Frontier Center at Joint Quantum Institute (JQI)
- Army Research Office (ARO)
- Atomtronics Multidisciplinary University Research Initiative (MURI)
- DARPA OLE Program
- Direct For Mathematical & Physical Scien
- Division Of Physics [822671] Funding Source: National Science Foundation
- ICREA Funding Source: Custom
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Detecting topological order in cold-atom experiments is an ongoing challenge, the resolution of which offers novel perspectives on topological matter. In material systems, unambiguous signatures of topological order exist for topological insulators and quantum Hall devices. In quantum Hall systems, the quantized conductivity and the associated robust propagating edge modes-guaranteed by the existence of nontrivial topological invariants-have been observed through transport and spectroscopy measurements. Here, we show that optical-lattice-based experiments can be tailored to directly visualize the propagation of topological edge modes. Our method is rooted in the unique capability for initially shaping the atomic gas and imaging its time evolution after suddenly removing the shaping potentials. Our scheme, applicable to an assortment of atomic topological phases, provides a method for imaging the dynamics of topological edge modes, directly revealing their angular velocity and spin structure.
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