Majorana qubit decoherence by quasiparticle poisoning

By Diego Rainis, Daniel Loss. 2012

213 citations recorded by the source corpus.

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 nonequilibrium 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.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/3db9a89bf54678ae7a0be34b71c712aac14b6e58

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In Atomic and Molecular Physics, and Optics

In Condensed Matter Physics

Citations in the corpus

Milestones toward Majorana-based quantum computing (2015, background): “[92] Diego Rainis and Daniel Loss, “Majorana qubit deco-”
Resolving catastrophic error bursts from cosmic rays in large arrays of superconducting qubits (2021, background): “Our findings are also relevant for other solid-state quantum systems, such as spin qubits that would be sensitive to the induced charges [26], and Majorana fermion devices that would be sensitive to induced quasiparticle population [27, 28].”
Parity lifetime of bound states in a proximitized semiconductor nanowire (2015, background): “Theoretical estimates [8] suggest an inverse relationship between τ p and the number of available quasiparticles, with a proportionality that depends on system details.”