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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2015

Kerr coefficients of plasma resonances in Josephson junction chains

Résumé

We present an experimental and theoretical analysis of the self- and cross-Kerr effect of extended plasma resonances in Josephson junction chains. We calculate the Kerr coefficients by deriving and diagonalizing the Hamiltonian of a linear circuit model for the chain and then adding the Josephson non-linearity as a perturbation. The calculated Kerr-coefficients are compared with the measurement data of a chain of 200 junctions. The Kerr effect manifests itself as a frequency shift that depends linearly on the number of photons in a resonant mode. By changing the input power on a low signal level, we are able to measure this shift. The photon number is calibrated using the self-Kerr shift calculated from the sample parameters. We then compare the measured cross-Kerr shift with the theoretical prediction, using the calibrated photon number.

Dates et versions

hal-01355896 , version 1 (24-08-2016)

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Thomas Weissl, Bruno Küng, Etienne Dumur, Alexey K. Feofanov, Iulian Matei, et al.. Kerr coefficients of plasma resonances in Josephson junction chains. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (10), pp.104508. ⟨10.1103/PhysRevB.92.104508⟩. ⟨hal-01355896⟩
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