Nitsche, Thomas, Geib, Tobias, Stahl, Christoph, Lorz, Lennart, Cedzich, Christopher, Barkhofen, Sonja, Werner, Reinhard F. and Silberhorn, Christine (2019). Eigenvalue measurement of topologically protected edge states in split-step quantum walks. New J. Phys., 21. BRISTOL: IOP PUBLISHING LTD. ISSN 1367-2630
Full text not available from this repository.Abstract
We study topological phenomena of quantum walks by implementing a novel protocol that extends the range of accessible properties to the eigenvalues of the walk operator. To this end, we experimentally realise for the first time a split-step quantum walk with decoupling, which allows for investigating the effect of a bulk-boundary while realising only a single bulk configuration. The experimental platform is implemented with the well-established time-multiplexing architecture based on fibre-loops and coherent input states. The symmetry protected edge states are approximated with high similarities and we read-out the phase relative to a reference for all modes. In this way we observe eigenvalues which are distinguished by the presence or absence of sign flips between steps. Furthermore, the results show that investigating a bulk-boundary with a single bulk is experimentally feasible when decoupling the walk beforehand.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
| Creators: |
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| URN: | urn:nbn:de:hbz:38-150721 | ||||||||||||||||||||||||||||||||||||
| DOI: | 10.1088/1367-2630/ab12fa | ||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | New J. Phys. | ||||||||||||||||||||||||||||||||||||
| Volume: | 21 | ||||||||||||||||||||||||||||||||||||
| Date: | 2019 | ||||||||||||||||||||||||||||||||||||
| Publisher: | IOP PUBLISHING LTD | ||||||||||||||||||||||||||||||||||||
| Place of Publication: | BRISTOL | ||||||||||||||||||||||||||||||||||||
| ISSN: | 1367-2630 | ||||||||||||||||||||||||||||||||||||
| Language: | English | ||||||||||||||||||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||||||||||||||||||
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| Refereed: | Yes | ||||||||||||||||||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/15072 |
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