Nonlocal conductance spectroscopy in three-terminal topological superconductor hybrid setups has been proposed as a way to conclusively detect topological phase transitions involving Majorana zero modes. Topological entanglement entropy is yet another way to gauge nonlocality in connection with the bulk-boundary correspondence of a topological phase. We show that while both the entanglement entropy and the nonlocal conductance exhibit a clear topological phase-transition signature for long enough pristine nanowires, nonlocal conductance fails to signal a topological phase transition for shorter disordered wires. While recent experiments have indeed shown premature gap-closing signatures in the nonlocal conductance spectra, we demonstrate that the entanglement entropy can indeed signal a genuine transition, regardless of the constituent nonidealities in an experimental situation.

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• Majorana bound states
• Topological superconductors
• Topological materials
• Nonequilibrium Green's function