Observation of Topologically Protected Bound States in Photonic Quantum Walks

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Observation of Topologically Protected Bound States in Photonic Quantum Walks

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dc.contributor.author Kitagawa, Takuya
dc.contributor.author Broome, Matthew A.
dc.contributor.author Fedrizzi, Alessandro
dc.contributor.author Rudner, Mark S.
dc.contributor.author Berg, Erez
dc.contributor.author Kassal, Ivan
dc.contributor.author Aspuru-Guzik, Alan
dc.contributor.author Demler, Eugene A.
dc.contributor.author White, Andrew G.
dc.date.accessioned 2012-06-13T14:00:36Z
dash.embargo.terms 2012-12-07
dc.date.issued 2012
dc.identifier.citation Kitagawa, Takuya, Matthew A. Broome, Alessandro Fedrizzi, Mark S. Rudner, Erez Berg, Ivan Kassal, Alán Aspuru-Guzik, Eugene Demler and Andrew G. White. 2012. Observation of topologically protected bound states in photonic quantum walks. Nature Communications 3(6): 882. en_US
dc.identifier.issn 2041-1723 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8873146
dc.description.abstract Topological phases exhibit some of the most striking phenomena in modern physics. Much of the rich behaviour of quantum Hall systems, topological insulators, and topological superconductors can be traced to the existence of robust bound states at interfaces between different topological phases. This robustness has applications in metrology and holds promise for future uses in quantum computing. Engineered quantum systems—notably in photonics, where wavefunctions can be observed directly—provide versatile platforms for creating and probing a variety of topological phases. Here we use photonic quantum walks to observe bound states between systems with different bulk topological properties and demonstrate their robustness to perturbations—a signature of topological protection. Although such bound states are usually discussed for static (time-independent) systems, here we demonstrate their existence in an explicitly time-dependent situation. Moreover, we discover a new phenomenon: a topologically protected pair of bound states unique to periodically driven systems. en_US
dc.description.sponsorship Chemistry and Chemical Biology en_US
dc.description.sponsorship Physics en_US
dc.language.iso en_US en_US
dc.publisher Nature Publishing Group en_US
dc.relation.isversionof doi:10.1038/ncomms1872 en_US
dc.relation.hasversion http://arxiv.org/abs/1105.5334 en_US
dc.relation.hasversion http://cmt.harvard.edu/demler/PUBLICATIONS/ref149.pdf en_US
dash.license LAA
dc.subject physical sciences en_US
dc.subject optical physics en_US
dc.subject theoretical physics en_US
dc.title Observation of Topologically Protected Bound States in Photonic Quantum Walks en_US
dc.type Journal Article en_US
dc.description.version Author's Original en_US
dc.relation.journal Nature Communications en_US
dash.depositing.author Aspuru-Guzik, Alan
dash.waiver 2012-04-22
dc.date.available 2012-12-07T08:30:29Z

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  • FAS Scholarly Articles [6463]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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