Protocol for detecting the nonlocality of the multi-Majorana Systems

• URL: http://arxiv.org/abs/2506.17003v1
• Date: Fri, 20 Jun 2025 13:56:24 GMT
• Title: Protocol for detecting the nonlocality of the multi-Majorana Systems
• Authors: Bai-Ting Liu, Peng Qian, Zhan Cao, Dong E. Liu,
• Abstract summary: Majorana zero modes (MZMs) are non-Abelian quasiparticles with the potential to serve as topological qubits for fault-tolerant quantum computing.<n>We propose a protocol using an entanglement witness based solely on parity measurements to distinguish the nonlocal characteristics of MZM systems.
• Score: 9.905704602340402
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Majorana zero modes (MZMs) are non-Abelian quasiparticles with the potential to serve as topological qubits for fault-tolerant quantum computing due to their ability to encode quantum information nonlocally. In multi-Majorana systems configured into two separated subsystems, nontrivial quantum correlations persist, but the presence of trivial Andreev bound states (ABSs) can obscure this nonlocality if MZM preparation fails. To address this, we propose a protocol using an entanglement witness based solely on parity measurements to distinguish the nonlocal characteristics of MZM systems. Our framework, which is experimentally implementable, achieves a detection probability of approximately 18% in a 6-site system and demonstrates robustness under environmental noise, albeit with a reduced detection rate in the resence of quasiparticle contamination.

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