Entanglement is generated dynamically in two coupled superconducting qubits via Floquet-state hybridization under multiphoton resonance and can be coherently suppressed by tuning the drive amplitude.
Hidden time-nonlocal Floquet symmetries
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abstract
We investigate the Floquet spectrum of a detuned, driven two-level system and show that it exhibits exact quasienergy crossings when the detuning is an integer multiple of the energy quantum of the driving field. This behavior can be explained by a hidden time-nonlocal parity, which allows the Floquet modes to be classified as even or odd. Then a generic feature is the emergence of exact crossings between quasienergies of different parity. A constructive proof of the existence of the symmetry is based on a scalar recurrence relation. Moreover, we present a general scheme for its numerical computation, which can be applied to models beyond the two-level system. Analytical results are illustrated with numerical data.
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quant-ph 1years
2026 1verdicts
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Floquet Entanglement Generation in Parametrically Driven Coupled Superconducting Qubits
Entanglement is generated dynamically in two coupled superconducting qubits via Floquet-state hybridization under multiphoton resonance and can be coherently suppressed by tuning the drive amplitude.