Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 11: Majorana Physics

TT 11.10: Talk

Monday, April 1, 2019, 17:45–18:00, H4

Simulating topological tensor networks with Majorana qubits — •Carolin Wille¹, Reinhold Egger², Jens Eisert¹, and Alexander Altland³ — ¹FU Berlin — ²Heinrich-Heine-Universität Düsseldorf — ³Universität zu Köln

The realization of topological quantum phases of matter remains a key challenge to condensed matter physics and quantum information science. In this work, we demonstrate that progress in this direction can be made by combining concepts of tensor network theory with Majorana device technology. Considering the topological double semion string-net phase as an example, we exploit the fact that the representation of topological phases by tensor networks can be significantly simpler than their description by lattice Hamiltonians. The building blocks defining the tensor network are tailored to realization via simple units of capacitively coupled Majorana bound states. In the case under consideration, this defines a remarkably simple blueprint of a synthetic double semion string-net, and one may be optimistic that the required device technology will be available soon. Our results indicate that the implementation of tensor network structures via mesoscopic quantum devices may define a powerful novel avenue to the realization of synthetic topological quantum matter in general.