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The resonant frequencies of three-dimensional microwave cavities are explicitly dependent on the dielectric constant of the material filling the cavity, making them an ideal system for probing material properties. In particular, dielectric constant m
Externí odkaz:
http://arxiv.org/abs/2207.08852
Superfluid $^4$He (He-II) is a widely studied model system for exploring finite-size effects in strongly confined geometries. Here, we study He-II confined in mm-scale channels of 25 and 50 nm height at high pressures using a nanofluidic Helmholtz re
Externí odkaz:
http://arxiv.org/abs/2202.11725
Publikováno v:
Phys. Rev. X 11, 031053 (2021)
Dynamical backaction resulting from radiation pressure forces in optomechanical systems has proven to be a versatile tool for manipulating mechanical vibrations. Notably, dynamical backaction has resulted in the cooling of a mechanical resonator to i
Externí odkaz:
http://arxiv.org/abs/2104.11218
Publikováno v:
EPJ Web of Conferences, Vol 67, p 02124 (2014)
The article presents results obtained based on numerical simulation of two-dimensional vortex points and inertial tracer particles in two-component counterflowing superfluid He-II. In the low temperature limit (no normal fluid, no friction) our model
Externí odkaz:
https://doaj.org/article/f125ac8d1e79478a947c3a8f47219652
Publikováno v:
Phys. Rev. Lett. 125, 025301 (2020)
Turbulent flow restricted to two dimensions can spontaneously develop order on large scales, defying entropy expectations and in sharp contrast with turbulence in three dimensions where nonlinear turbulent processes act to destroy large-scale order.
Externí odkaz:
http://arxiv.org/abs/2003.01079
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We report preliminary results of the complementary experimental and numerical studies on spatiotemporal tangle development and streamwise vortex line density (VLD) distribution in counterflowing $^4$He. The experiment is set up in a long square chann
Externí odkaz:
http://arxiv.org/abs/1609.01960
Publikováno v:
Phys. Rev. B 94, 174504 (2016)
We report complementary experimental, numerical and theoretical study of turbulent coflow, counterflow and pure superflow of superfluid He-4 in a channel, resulting in a physically transparent and relatively simple model of decaying quantum turbulenc
Externí odkaz:
http://arxiv.org/abs/1509.03765
We report computer simulations of the interaction of seeding particles with quantized vortices and with the normal fluid flow in thermal counterflow of superfluid $^4$He. We show that if the particle concentration is too large, the vortex tangle is s
Externí odkaz:
http://arxiv.org/abs/1505.04081