Delayed creation of entanglement in superconducting qubits interacting with a microwave field

TL;DR

This paper investigates how intrinsic decoherence affects the delayed creation of entanglement in superconducting charge qubits interacting with a microwave field, revealing that initial state information can be preserved despite decoherence.

Contribution

It demonstrates the phenomenon of delayed entanglement creation due to decoherence and analyzes its dynamics considering dissipation and initial state information in superconducting qubits.

Findings

Decoherence can induce delayed entanglement creation.

Initial state information can be retrieved via quasi-probability distributions.

Correlation between qubits and field is reduced by decoherence.

Abstract

We explore the role played by the intrinsic decoherence in superconducting charge qubits in the presence of a microwave field applied as a magnetic flux. We study how the delayed creation of entanglement, which is opposite to the sudden death of entanglement, can be induced. We compute the time evolution of the population inversion, total correlation and entanglement, taking into account the junction mixed state and dissipation of the cavity field. We show that although decoherence destroys the correlation of the junction and field, information of the initial state may be obtained via quasi-probability distribution functions.