Phase-slip oscillator: few-photon non-linearities

Details Phase-slip oscillator: few-photon non-linearities Phase-slip oscillator: few-photon non-linearities

2009-12-18

arxiv.org/abs/0912.3699v1

Phys. Rev. Lett. 106, 077004 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.106.077004

Non-linear effects on driven oscillations are important in many fields of physics, ranging from applied mechanics to optics. They are instrumental for quantum applications. A limitation is that the non-linearities known up to now are featureless functions of the number of photons N in the oscillator. Here we show that the non-linearities found in an oscillator where superconducting inductance is subject to coherent phase-slips, are more interesting. They oscillate as a function of number of photons N with a period of the order of square root of N, which is the spread of the coherent state. We prove that such non-linearities result in multiple metastable states encompassing few photons and study oscillatory dependence of various responses of the resonator. The experimental realization of our proposal can deliver an unambiguous verification of coherent quantum phase-slips.

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