Song, W.-L., You, J.-B., Xu, J. K., Yang, W. L., & An, J.-H. (2020). Floquet Engineering of Two Weakly Coupled Superconducting Flux Qubits. Physical Review Applied, 14(5). doi:10.1103/physrevapplied.14.054049
We explore the periodically driven dynamics of two weakly coupled flux qubits and propose a scheme to generate a maximally entangled state based on Floquet engineering. The periodic driving modifies the quasienergy spectrum of the system and induces crossing of quasienergies, and the weak coupling between them lifts the degeneracy of quasienergies. It is found that the phenomena of entanglement resonance of Floquet state appear at certain values of the driving parameters, which could be demonstrated by virtue of the Rabi-frequency spectrum and average concurrence during one driving period. Our scheme relaxes the experimental difficulty in adjusting the static parameters of the system to establish entanglement, and may open interesting perspectives for devising active decoherence-immune quantum-information devices.
This research / project is supported by the National Research Foundation Singapore - NRF-NSFC 2nd Joint Grant Call
Grant Reference no. : NRF2017-NRF-NSFC002-015
This research / project is supported by the A*STAR SERC - Quantum Technology Engineering
Grant Reference no. : A1685b0005
Youth Innovation Promotion Association (CAS No. 2016299)