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arXiv · 2511.02085

Current cross-correlation spectroscopy of Majorana bound states

Michael Ridley·Eliahu Cohen·Christian Flindt·Riku Tuovinen
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Abstract

The clock speed of topological quantum computers based on Majorana zero mode (MZM)-supporting nanoscale devices is limited by the time taken for electrons to traverse the device. We employ the time-dependent Landauer-B{\"u}ttiker transport theory for current cross-lead correlations in a superconducting nanowire junction hosting MZMs. From the time-dependent quantum noise, we are able to extract traversal times for electrons crossing the system. After demonstrating a linear scaling of traversal times with nanowire length, we present a heuristic formula for the traversal times which accurately captures their behaviour. We then connect our framework to a proposed experimental verification of this discriminant between spurious and genuine MZMs utilizing time-resolved transport measurements.

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Michael Ridley, Eliahu Cohen, Christian Flindt, Riku Tuovinen. 2025-11-03. Current cross-correlation spectroscopy of Majorana bound states. https://doi.org/10.1103/vyq4-xc1j

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