Bandgap-assisted quantum control of topological edge states in a cavity

2019/06/30 by Wei Nie, Yu-xi Liu
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Parity (physics) #Quantum #Quantum Information and Cryptography #Qubit #Symmetry protected topological order #Topological Materials and Phenomena #Topological degeneracy #Topological entropy in physics #Topological order #Topology (electrical circuits) #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevresearch.2.012076

published as Phys. Rev. Research 2, 012076 (2020) · 7+15 pages, 5+11 figures, will appear in Physical Review Research

openalex created_date 2019/07/12 · arxiv created 2020/03/02 · openalex publication_date 2020/03/24 · arxiv updated 2020/03/26 · openalex updated_date 2026/08/05

Abstract

In this work, the authors study interactions between light and topological quantum matter, by exploring strong nonlinearity due to topological bandgap. Based on parity properties of edge states and bulk states in a topological qubit array, a cavity spectroscopy method is proposed in circuit QED system, where qubit-qubit and qubit-cavity couplings are tunable, to detect topological phase transition and Rabi splittings of edge states. The bandgap-enabled coupling between edge states provides a way for quantum control in topological systems

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