Majorana qubit decoherence by quasiparticle poisoning

Abstract

We consider the problem of quasiparticle poisoning in a nanowire-based realization of a Majorana qubit, where a spin-orbit-coupled semiconducting wire is placed on top of a (bulk) superconductor. By making use of recent experimental data exhibiting evidence of a low-temperature residual non-equilibrium quasiparticle population in superconductors, we show by means of analytical and numerical calculations that the dephasing time due to the tunneling of quasiparticles into the nanowire may be problematically short to allow for qubit manipulation.

10 pages, 7 figures

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Cited by in corpus (220)

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• Topology by dissipation
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• A Short Introduction to Topological Quantum Computation
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• Resolving catastrophic error bursts from cosmic rays in large arrays of superconducting qubits
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• Evidence of a nonequilibrium distribution of quasiparticles in the microwave response of a superconducting aluminium resonator
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• Readout of Majorana parity states using a quantum dot
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• Electron-Tunneling-Assisted Non-Abelian Braiding of Rotating Majorana Bound States
• Demonstrating Entanglement by Testing Bell's Theorem in Majorana Wires
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