Souto, R. S., Baran, V. V., Nitsch, M., Maffi, L., Paaske, J., Leijnse, M., & Burrello, M. (2024). Majorana modes in quantum dots coupled via a floating superconducting island. arXiv preprint arXiv:2411.07068v1.
This theoretical study investigates the low-energy properties of a system comprising two quantum dots coupled via a floating superconducting island, focusing on the impact of the island's charging energy on the emergence of Majorana modes.
The researchers employed a two-pronged approach: a simplified, analytical model based on spin-polarized quantum dots with effective coupling parameters and a more comprehensive microscopic model incorporating electron spin, fermionic degrees of freedom in the island, and Coulomb interactions. They analyzed the Majorana polarization and energy level splitting to identify Majorana sweet spots and their characteristics.
The research demonstrates the theoretical feasibility of engineering Majorana modes in quantum dot systems coupled through a floating superconducting island, highlighting the importance of the island's charging energy. This finding opens up new avenues for exploring Majorana physics and developing novel quantum computing architectures based on controllable Majorana modes.
This study contributes significantly to the field of topological quantum computing by providing a theoretical framework for realizing Majorana modes in a more controllable and potentially scalable platform. The findings could pave the way for developing novel quantum devices, such as Majorana-based qubits and Majorana-mediated teleportation devices.
The study primarily focuses on a theoretical analysis. Experimental validation of the proposed system and its predicted properties is crucial for further development. Additionally, exploring the impact of decoherence and disorder on the stability of Majorana modes in this system is essential for practical applications.
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by R. Seoane So... at arxiv.org 11-12-2024
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