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Correlated quantum noise can surprisingly generate long-lived entanglement in qubit systems, controllable by temperature and driving. This noise can also suppress unwanted qubit crosstalk, offering new quantum computing strategies.

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Area of Science:

  • Quantum Computing
  • Quantum Information Science
  • Condensed Matter Physics

Background:

  • Correlated noise across multiple qubits is a major obstacle for scalable quantum processors.
  • Understanding noise's role in qubit dynamics is crucial but remains challenging.
  • Existing research quantifies noise but lacks comprehensive understanding of its impact.

Purpose of the Study:

  • To analytically investigate driven qubit dynamics under spatially correlated noise (Markovian and non-Markovian).
  • To explore the potential of correlated noise as a resource for entanglement generation and crosstalk suppression.
  • To reveal the influence of spatio-temporally correlated 1/f noise on decoherence and entanglement.

Main Methods:

  • Analytical study of driven qubit dynamics.
  • Modeling of Markovian and non-Markovian correlated noise.
  • Investigation of temperature-dependent effects on qubit interactions.
  • Analysis of spatio-temporally correlated 1/f noise impact.

Main Results:

  • Low temperatures enable generation of long-lived, controllable qubit entanglement via correlated quantum noise.
  • Higher operating temperatures unexpectedly suppress qubit crosstalk induced by correlated noise.
  • Spatio-temporally correlated 1/f noise affects decoherence, with temporal correlations restoring entanglement.
  • Correlated noise can be leveraged as a resource for controlled entanglement generation.

Conclusions:

  • Correlated noise presents opportunities for controlled entanglement generation in quantum systems.
  • Temperature control is key to either generating entanglement or suppressing crosstalk.
  • Understanding noise dynamics is vital for advancing fault-tolerant quantum computing.
  • This work offers insights into managing and utilizing quantum noise effectively.