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- W2777153635 abstract "We study the flight time fluctuations in an anisotropic medium inspired by a cosmic string with an effective fluctuating refractive index caused by fluctuating vacuum electric fields, which are analogous to the lightcone fluctuations due to fluctuating spacetime metric when gravity is quantized. The medium can be realized as a metamaterial that mimics a cosmic string in the sense of transformation optics. For a probe light close to the analogue string, the flight time variance is $nu$ times that in a normal homogeneous and isotropic medium, where $nu$ is a parameter characterizing the deficit angle of the spacetime of a cosmic string. The parameter $nu$, which is always greater than unity for a real cosmic string, is determined by the dielectric properties of the metamaterial for an analogue string. Therefore, the flight time fluctuations of a probe light can be manipulated by changing the electric permittivity and magnetic permeability of the analogue medium. We argue that it seems possible to fabricate a metamaterial that mimics a cosmic string with a large $nu$ in laboratory so that a currently observable flight time variance might be achieved." @default.
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- W2777153635 date "2018-02-01" @default.
- W2777153635 modified "2023-10-18" @default.
- W2777153635 title "Manipulating lightcone fluctuations in an analogue cosmic string" @default.
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- W2777153635 doi "https://doi.org/10.1016/j.physletb.2017.12.047" @default.
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