Topological Qubits with Majorana Fermions in Trapped Ions

TL;DR

This paper proposes a method to encode topologically-protected qubits using Majorana fermions in trapped-ion chains, enhancing decoherence protection and enabling efficient quantum interfaces for multiqubit photonic states.

Contribution

It introduces a novel approach to realize topologically protected qubits with Majorana fermions in trapped ions, and demonstrates potential for quantum memory and interfaces.

Findings

Protection against major sources of decoherence

Feasibility of local operations and measurements

Encoding of multiqubit photonic states into Majorana-fermion qubits

Abstract

We propose a method of encoding a topologically-protected qubit using Majorana fermions in a trapped-ion chain. This qubit is protected against major sources of decoherence, while local operations and measurements can be realized. Furthermore, we show that an efficient quantum interface and memory for arbitrary multiqubit photonic states can be built, encoding them into a set of entangled Majorana-fermion qubits inside cavities.