Dynamics of Majorana-based qubits

Bela Bauer
Microsoft Station Q

We study the dynamics of Majorana-based qubits. In the first part, we study Majorana zero modes that are shuttled via local tuning of the electrochemical potential in a superconducting wire. By performing time-dependent simulations of microscopic lattice models, we show that diabatic corrections associated with the moving Majorana modes are quantitatively captured by a simple Landau-Zener description. We further simulate a Rabi-oscillation protocol in a specific qubit design with four Majorana zero modes in a single wire and quantify constraints on the timescales for performing qubit operations in this setup. We then discuss the effects of noise in the control parameters on a simple qubit design that can exhibit topological protection.

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