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Entanglement dynamics in superconducting qubits affected by local bistable impurities

Physica Scripta, ISSN: 1402-4896, Vol: T147, Issue: T147
2012
  • 61
    Citations
  • 0
    Usage
  • 10
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    61
    • Citation Indexes
      61
  • Captures
    10

Article Description

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 g 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. © 2012 The Royal Swedish Academy of Sciences.

Bibliographic Details

Franco, Rosario Lo; Compagno, Giuseppe; Paladino, Elisabetta; Falci, Giuseppe; D'Arrigo, Antonio

IOP Publishing

Physics and Astronomy; Mathematics

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