Topological Josephson bifurcation amplifier: Semiclassical theory

Amplifiers based on Josephson junctions allow for a fast and noninvasive readout of superconducting qubits. Motivated by the ongoing progress toward the realization of fault-tolerant qubits based on Majorana bound states, we investigate the topological counterpart of the Josephson bifurcation amplifier. We predict that the bifurcation dynamics of a topological Josephson junction driven in the appropriate parameter regime may be used as an additional tool to detect the emergence of Majorana bound states.

Automated summary

Amplifiers based on Josephson junctions offer a fast and noninvasive method for reading superconducting qubits. Researchers predict that the bifurcation dynamics of a topological Josephson junction in the appropriate parameter regime can serve as an additional tool for detecting the emergence of Majorana bound states, as progress continues towards realizing fault-tolerant qubits based on these states.