Dynamical Casimir effect in superconducting microwave circuits
By J. Johansson, G. Johansson, C. Wilson, Franco Nori. 2010
166 citations recorded by the source corpus.
We theoretically investigate the dynamical Casimir effect (DCE) in electrical circuits based on superconducting microfabricated waveguides with tunable boundary conditions. We propose implementing a rapid modulation of the boundary conditions by tuning the applied magnetic flux through superconducting quantum-interference devices that are embedded in the waveguide circuits. We consider two circuits: (i) An open waveguide circuit that corresponds to a single mirror in free space, and (ii) a resonator coupled to a microfabricated waveguide, which corresponds to a single-sided cavity in free space. We analyze the properties of the DCE in these two setups by calculating the generated photon-flux densities, output-field correlation functions, and the quadrature squeezing spectra. We show that these properties of the output field exhibit signatures unique to the radiation due to the DCE, and could, therefore, be used for distinguishing the DCE from other types of radiation in these circuits. We also discuss the similarities and differences between the DCE, in the resonator setup, and the down-conversion of pump photons in parametric oscillators.
Subfields: Atomic and Molecular Physics, and Optics, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/e9fc66c6d01ee7835a06a29b49f9c450e59f0e88
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In Atomic and Molecular Physics, and Optics
- Franco Nori
- Sahel Ashhab
- I. Georgescu
- J. Johansson
- Paul D. Nation
- Miles P. Blencowe
- G. Paraoanu
- J. You
Citations in the corpus
- Dynamical Casimir effect in a Josephson metamaterial (2011, background): “We observe two-mode squeezed (TMS) photons and a characteristic double peak [21] in the squeezed output noise spectrum when the resonator is detuned from ωd/2.”
- Colloquium: Stimulating uncertainty: Amplifying the quantum vacuum with superconducting circuits (2011, methodology): “This correspondence between the dynamical Casimir effect in a single-mode cavity and parametric amplification has also been discussed in (Schützhold and Unruh, 2005); (Dezael and Lambrecht, 2010); (Johansson et al., 2010).”
- Quantum Simulation (2013, background): “such as the dynamical Casimir effect (Johansson et al., 2010; Lähteenmäki et al., 2013; Wilson et al., 2011).”