6533b7d4fe1ef96bd12631eb
RESEARCH PRODUCT
Robustness of quantum memories based on Majorana zero modes
J. I. CiracMikhail D. LukinLeonardo MazzaLeonardo MazzaMatteo RizziMatteo Rizzisubject
PhysicsQuantum PhysicsDephasingFOS: Physical sciencesParity (physics)Condensed Matter Physics01 natural sciences010305 fluids & plasmasElectronic Optical and Magnetic MaterialsMAJORANAQuadratic equationRobustness (computer science)Quantum mechanics0103 physical sciencesQuantum informationQuantum Physics (quant-ph)010306 general physicsQuantumQuantum computerdescription
We analyze the rate at which quantum information encoded in zero-energy Majorana modes is lost in the presence of perturbations. We show that information can survive for times that scale exponentially with the size of the chain both in the presence of quenching and time-dependent quadratic dephasing perturbations, even when the latter have spectral components above the system's energy gap. The origin of the robust storage, namely the fact that a sudden quench affects in the same way both parity sectors of the original spectrum, is discussed, together with the memory performance at finite temperatures and in the presence of particle exchange with a bath.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-12-19 | Physical Review B |