2007/07/31 by F. F. Fanchini, Reginaldo de Jesus Napolitano, R. d. J. Napolitano · 2 citations
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Boson #Dephasing #Dissipation #Master equation #Mathematics #Phase qubit #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Qubit #State (computer science) #Statistical physics #Uncorrelated #quant-ph
paper · pdf · doi:10.1103/physreva.76.062306
published as Physical Review A 76, 062306 (2007)
arxiv created 2007/10/22 · openalex publication_date 2007/12/13 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that a simple arrangement of external fields, consisting of a static component and an orthogonal rotating component, can continuously decouple a two-qubit entangled state from uncorrelated dephasing, bit flipping, and dissipation at finite temperature. We consider a situation where an entangled state shared between two noninteracting qubits is initially prepared and left to evolve under environmental perturbations and the protection of external fields. To illustrate the protection of the entanglement, we solve numerically a master equation in the Born approximation, considering independent boson fields at the same temperature coupled to the different error agents of each qubit.