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Updated: Apr 27, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Dissipation in a simple model of a topological Josephson junction
Paul Matthews1, Pedro Ribeiro2, Antonio M García-García3
1CIC nanoGUNE, Tolosa Hiribidea 76, 20018 Donostia-San Sebastian, Spain and University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Abstract:
The topological features of low-dimensional superconductors have created a lot of excitement recently because of their broad range of applications in quantum information and their potential to reveal novel phases of quantum matter. A potential problem for practical applications is the presence of phase slips that break phase coherence. Dissipation in nontopological superconductors suppresses phase slips and can restore long-range order. Here, we investigate the role of dissipation in a topological Josephson junction. We show that the combined effects of topology and dissipation keep phase and antiphase slips strongly correlated so that the device is superconducting even under conditions where a nontopological device would be resistive. The resistive transition occurs at a critical value of the dissipation that is 4 times smaller than that expected for a conventional Josephson junction. We propose that this difference could be employed as a robust experimental signature of topological superconductivity.
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