Majorana qubit decoherence by quasiparticle poisoning
arXiv:1204.3326 · doi:10.1103/PhysRevB.85.174533
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
References in corpus (15)
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
- Non-Abelian quantum order in spin-orbit-coupled semiconductors: The search for topological Majorana particles in solid state systems
- Measurement of Rashba and Dresselhaus spin-orbit magnetic fields
- Non-Abelian Topological Orders and Majorana Fermions in Spin-Singlet Superconductors
- Interaction Effects in Topological Superconducting Wires Supporting Majorana Fermions
- Majorana edge states in interacting one-dimensional systems
- Number fluctuations of sparse quasiparticles in a superconductor
- Quasiparticle relaxation of superconducting qubits in the presence of flux
- Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits
- Quasiparticle decay rate of Josephson charge qubit oscillations
- Microsecond resolution of quasiparticle tunneling in the single-Cooper-pair-transistor
- Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor