Topological phase transitions induced by varying topology and boundaries in the toric code

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Jamadagni, A.; Bhattacharyya, A.: Topological phase transitions induced by varying topology and boundaries in the toric code. In: New journal of physics : the open-access journal for physics 23 (2021), 103001. DOI: https://doi.org/10.1088/1367-2630/ac27e3

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/11770

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Sum total of downloads: 87




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Abstract: 
One of the important characteristics of topological phases of matter is the topology of the underlying manifold on which they are defined. In this paper, we present the sensitivity of such phases of matter to the underlying topology, by studying the phase transitions induced due to the change in the boundary conditions. We claim that these phase transitions are accompanied by broken symmetries in the excitation space and to gain further insight we analyze various signatures like the ground state degeneracy, topological entanglement entropy while introducing the open-loop operator whose expectation value effectively captures the phase transition. Further, we extend the analysis to an open quantum setup by defining effective collapse operators, the dynamics of which cool the system to distinct steady states both of which are topologically ordered. We show that the phase transition between such steady states is effectively captured by the expectation value of the open-loop operator.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2021
Appears in Collections:Fakultät für Mathematik und Physik

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1 image of flag of Germany Germany 46 52.87%
2 image of flag of United States United States 14 16.09%
3 image of flag of Nepal Nepal 5 5.75%
4 image of flag of France France 4 4.60%
5 image of flag of China China 4 4.60%
6 image of flag of Ireland Ireland 2 2.30%
7 image of flag of Canada Canada 2 2.30%
8 image of flag of No geo information available No geo information available 1 1.15%
9 image of flag of Taiwan Taiwan 1 1.15%
10 image of flag of United Arab Emirates United Arab Emirates 1 1.15%
    other countries 7 8.05%

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