Multiphoton excitations and inverse population in two-flux-qubit system
arXiv:0908.2728 · doi:10.1103/PhysRevB.81.012506
Abstract
We study spectroscopy of artificial solid-state four-level quantum system. This system is formed by two coupled superconducting flux qubits. When multiple driving frequency of the applied microwaves matches the energy difference between any two levels, the transition to the upper level is induced. We demonstrate two types of the multi-photon transitions: direct transitions between two levels and ladder-type transitions via an intermediate level. For the latter transitions, in particular, the inverse population of the excited state with respect to the ground one is realized. These processes can be useful for the control of the level population for the multilevel scalable quantum systems.
4 pages, 2 figures; v.2: minor changes
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Cited by in corpus (10)
- Landau-Zener-Stuckelberg interferometry
- Amplitude spectroscopy of two coupled qubits
- Multiphoton transitions in Josephson-junction qubits (Review Article)
- Non-Hermitian Hamiltonian approach to the microwave transmission through one- dimensional qubit chain
- Amplitude tuning of steady state entanglement in strongly driven coupled qubits
- Dissipative dynamics of a two-qubit system: Four-level lasing
- Parametric four-wave mixing toolbox for superconducting resonators
- Control of spectroscopic features of multiphoton transitions in two coupled qubits by driving fields
- Resonance at the Rabi frequency in a superconducting flux qubit
- Efficient steady state entanglement generation in strongly driven coupled qubits