Failure of protection of Majorana based qubits against decoherence

TL;DR

This paper critically examines the presumed decoherence resistance of Majorana-based qubits, revealing that they are fundamentally as vulnerable to decoherence as other qubit types from an open quantum system perspective.

Contribution

It challenges the common belief that Majorana qubits are inherently protected against decoherence by providing a fundamental analysis of their susceptibility.

Findings

Majorana qubits are as susceptible to decoherence as other qubits.

Theoretical arguments for Majorana qubit protection are not supported by open quantum system analysis.

Protection claims do not hold under fundamental quantum considerations.

Abstract

Qubit realizations based on Majorana bound states have been considered promising candidates for quantum information processing which is inherently inert to decoherence. We put the underlying general arguments leading to this conjecture to the test from an open quantum system perspective. It turns out that, from a fundamental point of view, the Majorana qubit is as susceptible to decoherence as any local paradigm of a qubit.