Coupling energy dependence of spectral properties in weak superconducting contacts

The sensitivity to the type of dependence between the supercurrent and the quantum phase is investigated for the In(i) dependences of the zero-currents and current steps in the U–I curves of the Josephson point contacts on the amplitude of an external electromagnetic wave, i. Especially the discrepancies are considered between the calculated and the experimental data on the spectral properties of the Josephson contacts which rise, due to the use of a simple j(φ) ∼ sin φ function independently of the coupling energy in the weak superconducting contact. A possible technique for the construction of the j(φ) function by experimental In(i) curves is proposed. [Russian Text Ignored].

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