Progress and challenges for topological qubits

William D. Oliver

Sairamakrishna BuchiReddy Karri, Fakhrun Jamal, Mohd Tajammul (communicating Author)

Topological qubits, especially Majorana zero modes based qubits, possess the intrinsic error correction and stability, and thus have the potential to revolutionize computation. Majorana based topological qubits are the focus of Microsoft's approach and they are different from traditional qubit technologies. In this study, we investigate the theoretical foundations of scalable, fault tolerant quantum computing, evaluate Microsoft's progress towards this goal and identify key challenges toward this challenging goal. A study based on a survey methodology is performed, studying awareness and perception about topological qubits. Theoretical advantages of topological qubits are evident, but realization of them through material fabrication and integration is difficult, as found. The results of the survey show the knowledge gaps of respondents as well as perceived benefit of topological quantum computing. There are more advances to be made in qubit control and scalability, but the Majorana ISing process proposed by Microsoft is promising. It is needed to bridge the gap between practicability and theory, for future research should be about the increase of material stability as well as experimental validation.

Anonymous

Mollie E. Schwartz, Cyrus F. Hirjibehedin

Murali Krishna Pasupuleti

Abstract: The rapid advancement of quantum computing is largely driven by innovations in quantum chip architectures, with superconducting and topological qubits emerging as the most promising candidates for scalable and fault-tolerant quantum processors. Superconducting qubits, built using Josephson junctions, have demonstrated significant progress in coherence time, gate fidelity, and quantum error correction, making them the backbone of leading quantum processors such as IBM’s Eagle and Google’s Sycamore. Meanwhile, topological qubits, based on Majorana zero modes (MZMs) and non-Abelian anyons, offer intrinsic error resistance, reducing the computational overhead required for fault-tolerant quantum operations. This chapter explores the fundamental principles, fabrication techniques, and scalability challenges associated with these next-generation quantum chips, highlighting key advancements in hybrid quantum architectures, quantum error mitigation, and cryogenic quantum-classical interfacing. Additionally, it examines the geopolitical and ethical considerations of quantum supremacy, along with the transformative impact of next-gen quantum chips on AI, cryptography, materials science, and optimization problems. As research accelerates, the path toward scalable, fault-tolerant quantum computing is becoming clearer, paving the way for a future where quantum processors outperform classical supercomputers in solving the world’s most complex challenges. Keywords: Quantum chips, superconducting qubits, topological qubits, Josephson junctions, Majorana zero modes, quantum error correction, hybrid quantum architectures, fault-tolerant quantum computing, cryogenic electronics, quantum-classical interfacing, scalable quantum processors, AI-driven quantum computing, quantum supremacy, post-quantum cryptography, nanofabrication, quantum hardware innovation

Chuck Easttom