Detecting photon-photon interactions in a superconducting circuit

Abstract : A local interaction between photons can be engineered by coupling a nonlinear system to a transmission line. The required transmission line can be conveniently formed from a chain of Josephson junctions. The nonlinearity is generated by side-coupling this chain to a Cooper pair box. We propose to probe the resulting photon-photon interactions via their effect on the current-voltage characteristic of a voltage-biased Josephson junction connected to the transmission line. Considering the Cooper pair box to be in the weakly anharmonic regime, we find that the dc current through the probe junction yields features around the voltages 2eV = n (h) over bar omega(s), where omega(s) is the plasma frequency of the superconducting circuit. The features at n >= 2 are a direct signature of the photon-photon interaction in the system.
Keywords : Single-Cooper-Pair
Type de document :
Article dans une revue
Physical Review B, 2015, 92 (13), pp.134503. 〈10.1103/PhysRevB.92.134503〉
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Contributeur : Jérôme Planès <>
Soumis le : jeudi 5 octobre 2017 - 16:07:26
Dernière modification le : vendredi 9 mars 2018 - 16:36:02

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Li-Jing Jin, Manuel Houzet, Julia S. Meyer, Harold U. Baranger, Frank. W. J. Hekking. Detecting photon-photon interactions in a superconducting circuit. Physical Review B, 2015, 92 (13), pp.134503. 〈10.1103/PhysRevB.92.134503〉. 〈hal-01611289〉



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