2021/03/26 by V. O. Munyaev, M. V. Bastrakova · 10 citations
Computer Science · Physics and Astronomy · #Amplitude #Coupling (piping) #Dephasing #Dissipative system #Floquet theory #Flux qubit #Materials science #Nonlinear system #Phase qubit #Physics #Population #Population inversion #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum entanglement #Quantum mechanics #Qubit #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physreva.104.012613
published in Physical Review A 104(1) (American Physical Society) · 14 pages, 4 figures
arxiv created 2021/03/26 · openalex publication_date 2021/07/26 · arxiv updated 2021/08/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The quantum level population behavior of two coupled flux qubits depending on the external driving field characteristics is studied. Explicit expressions for the multiphoton transition probabilities at an arbitrary control field amplitude are obtained for the case of small tunnel splitting energies. We describe the controllable features of their formation and thereby the creation or destruction of entanglement on the direct interlevel transition and during the transition through intermediate states by system bias tuning. We found a feature of the qubit population inversion that results in the independence of the resonance positions from the qubit coupling strength. Using the Floquet-Markov equation, we numerically demonstrate that the positions of multiphoton resonances are stable to dissipative processes.