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TT: Fachverband Tiefe Temperaturen
TT 12: Quantum Transport and Quantum Hall Effects (joint session HL/TT)
TT 12.6: Vortrag
Montag, 17. März 2025, 18:00–18:15, H15
Designing a quantum sorter based on two-dimensional topological insulators — •Amanda Teodora Preda1,2, Iulia Ghiu2, Lucian Ion2, Andrei Manolescu3, and George Alexandru Nemnes1,2 — 1Horia Hulubei National Institute for Physics and Nuclear Engineering, Reactorului 30, Magurele- Ilfov, 077125, Romania — 2University of Bucharest, Faculty of Physics, Atomistilor 405, Magurele-Ilfov, 077125, Romania — 3Department of Engineering, Reykjavik University, Menntavegur 1, Reykjavik IS-102, Iceland
The idea of a quantum sorter emerged in quantum information, a field that aims to exploit quantum effects and manipulate qubits for information processing. In theory, it was proven that one can propose a universal quantum sorter for any arbitrary observable. To this point, suitable experimental schemes of implementation for this proposal were explored mainly in quantum optics. In our study, we introduce a solid-state version of a quantum sorter, based on a multi-terminal mesoscopic device with multiple output ports, that aims to separate the incoming states by both their spin and transversal mode. In order to maximize the state-separation efficiency of such a device, we chose to exploit the unique transport properties of topological insulators. Employing the tight-binding based simulation package Kwant, we modeled a device that meets the criteria of an irreversible quantum sorter, using the well-established BHZ Hamiltonian to simulate a multi-terminal quantum system made up of both trivial and topological materials.
Keywords: quantum sorter; topological insulator; quantum spin hall effect; quantum transport; quantum information