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Multiphoton transitions in a macroscopic quantum two-state system | | S Saito
; M Thorwart
; H Tanaka
; M Ueda
; H Nakano
; K Semba
; H Takayanagi
; | | Date: |
16 Jul 2004 | | Journal: | Phys Rev Lett, 93 (3), 037001 | | Abstract: | We have observed multiphoton transitions between two macroscopic quantum-mechanical superposition states formed by two opposite circulating currents in a superconducting loop with three Josephson junctions. Resonant peaks and dips of up to three-photon transitions were observed in spectroscopic measurements when the system was irradiated with a strong rf-photon field. The widths of the multiphoton absorption dips are shown to scale with the Bessel functions in agreement with theoretical predictions derived from the Bloch equation or from a spin-boson model. | | Source: | PubMed, pmid15323856 | | Other source: | [GID 839217] cond-mat/0403425 | | Services: | Forum | Review | Favorites | |
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