Entanglement dynamics in superconducting qubits affected by local bistable impurities

Giuseppe Compagno, Rosario Lo Franco, D'Arrigo, D'Arrigo, Lo Franco, Paladino, Paladino, Falci, Rosario Lo Franco

Risultato della ricerca: Articlepeer review

52 Citazioni (Scopus)

Abstract

We study the entanglement dynamics for two independent superconducting qubits, each affected by a bistable impurity generating random telegraph noise (RTN) at pure dephasing. The relevant parameter is the ratio g between the qubit–RTN coupling strength and the RTN switching rate, which captures the physics of the crossover between Markovian and non-Markovian features of the dynamics. For identical qubit–RTN subsystems, a threshold value gth of the crossover parameter separates exponential decay and the onset of revivals; different qualitative behaviors also show up by changing the initial conditions of the RTN. We also show that, for different qubit–RTN subsystems, when both qubits are very strongly coupled to the RTN, an increase of entanglement revival amplitude may occur during the dynamics.
Lingua originaleEnglish
pagine (da-a)014019-
Numero di pagine4
RivistaPhysica Scripta
Volume2012
Stato di pubblicazionePublished - 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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