Decoherence of Majorana qubits caused by particle-hole conjugation asymmetry

TL;DR

This paper studies how particle-hole asymmetry impacts Majorana qubits, revealing that such asymmetry can induce decoherence through phase-shifts and bit-flips, but these effects are minimal in uniform systems with separated Majorana modes.

Contribution

It demonstrates the specific effects of particle-hole asymmetry on Majorana qubits and identifies conditions under which decoherence is negligible.

Findings

Particle-hole asymmetry shifts Majorana zero modes from zero energy.

Asymmetry causes phase-shifts and bit-flip decoherence in Majorana qubits.

Decoherence effects are negligible in uniform systems with separated Majorana modes.

Abstract

We investigate effects of the particle-hole asymmetry on the properties of Majorana qubtis. Particle-hole asymmetric pertrubation shifts Majorana zero mode from zero-energy. This type of asymmetry can act as a source of decoherence in Majorana qubits. We find that particle-hole asymmetric pertrubation causes phase-shifts and bit-flips decoherence processes in Majorana qubits. However, these sources of decoherence are negligible in uniform system with spatially separated Majorana zero modes.