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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: |
17 Mar 2004 | | Journal: | Phys. Rev. Lett. 93, 037001 (2004) DOI: 10.1103/PhysRevLett.93.037001 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Superconductivity | cond-mat.mes-hall cond-mat.supr-con | | 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: | arXiv, cond-mat/0403425 | | Other source: | [GID 839217] pmid15323856 | | Services: | Forum | Review | PDF | Favorites | |
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