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2016 ; 6
(ä): 21964
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Strong vacuum squeezing from bichromatically driven Kerrlike cavities: from
optomechanics to superconducting circuits
#MMPMID26916946
Garcés R
; de Valcárcel GJ
Sci Rep
2016[Feb]; 6
(ä): 21964
PMID26916946
show ga
Squeezed light, displaying less fluctuation than vacuum in some observable, is
key in the flourishing field of quantum technologies. Optical or microwave
cavities containing a Kerr nonlinearity are known to potentially yield large
levels of squeezing, which have been recently observed in optomechanics and
nonlinear superconducting circuit platforms. Such Kerr-cavity squeezing however
suffers from two fundamental drawbacks. First, optimal squeezing requires working
close to turning points of a bistable cycle, which are highly unstable against
noise thus rendering optimal squeezing inaccessible. Second, the light field has
a macroscopic coherent component corresponding to the pump, making it less
versatile than the so-called squeezed vacuum, characterised by a null mean field.
Here we prove analytically and numerically that the bichromatic pumping of
optomechanical and superconducting circuit cavities removes both limitations.
This finding should boost the development of a new generation of robust vacuum
squeezers in the microwave and optical domains with current technology.