6533b838fe1ef96bd12a3dd9
RESEARCH PRODUCT
Entanglement degradation in the solid state: Interplay of adiabatic and quantum noise
Giuseppe CompagnoBruno BellomoAntonio D'arrigoGiuseppe FalciR. Lo FrancoElisabetta Paladinosubject
PhysicsQuantum PhysicsQuantum decoherenceCondensed Matter - Mesoscale and Nanoscale PhysicsQuantum noiseFOS: Physical sciencesQuantum entanglementQuantum PhysicsSquashed entanglementSettore FIS/03 - Fisica Della MateriaAtomic and Molecular Physics and OpticsQuantum electrodynamicsQuantum mechanicsQubitMesoscale and Nanoscale Physics (cond-mat.mes-hall)Coincidence countingSuperconducting qubit entanglement open quantum systemsW stateAdiabatic processQuantum Physics (quant-ph)description
We study entanglement degradation of two non-interacting qubits subject to independent baths with broadband spectra typical of solid state nanodevices. We obtain the analytic form of the concurrence in the presence of adiabatic noise for classes of entangled initial states presently achievable in experiments. We find that adiabatic (low frequency) noise affects entanglement reduction analogously to pure dephasing noise. Due to quantum (high frequency) noise, entanglement is totally lost in a state-dependent finite time. The possibility to implement on-chip both local and entangling operations is briefly discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-01-27 |