Zobrazeno 1 - 10
of 1 798
pro vyhledávání: '"Barenghi A"'
Autor:
Stasiak, Piotr Z., Xing, Yiming, Alihosseini, Yousef, Barenghi, Carlo F., Baggaley, Andrew, Guo, Wei, Galantucci, Luca, Krstulovic, Giorgio
The minimum separation between reconnecting vortices in fluids and superfluids obeys a universal scaling law with respect to time. The pre-reconnection and the post-reconnection prefactors of this scaling law are different, a property related to irre
Externí odkaz:
http://arxiv.org/abs/2411.08942
We simulate the dynamics of about 600 quantum vortices in a spinning-down cylindrical container using a Gross--Pitaevskii model. For the first time, we find convincing spatial-temporal evidence of avalanching behaviour resulting from vortex depinning
Externí odkaz:
http://arxiv.org/abs/2410.16878
Providing closed form estimates of the decoding failure rate of iterative decoder for low- and moderate-density parity check codes has attracted significant interest in the research community over the years. This interest has raised recently due to t
Externí odkaz:
http://arxiv.org/abs/2401.16919
We employ the Gross--Pitaevskii theory to model a quantized vortex depinning from a small obstacle in a two-dimensional superfluid due to an imposed background superfluid flow. We find that, when the flow's velocity exceeds a critical value, the vort
Externí odkaz:
http://arxiv.org/abs/2311.06664
Autor:
Stasiak, Piotr Z., Baggaley, Andrew W., Krstulovic, Giorgio, Barenghi, Carlo F., Galantucci, Luca
The reciprocal energy and enstrophy transfers between normal fluid and superfluid components dictate the overall dynamics of superfluid $^4$He including the generation, evolution and coupling of coherent structures, the distribution of energy among l
Externí odkaz:
http://arxiv.org/abs/2310.05826
Autor:
Švančara, Patrik, Smaniotto, Pietro, Solidoro, Leonardo, MacDonald, James F., Patrick, Sam, Gregory, Ruth, Barenghi, Carlo F., Weinfurtner, Silke
Gravity simulators are laboratory systems where small excitations like sound or surface waves behave as fields propagating on a curved spacetime geometry. The analogy between gravity and fluids requires vanishing viscosity, a feature naturally realis
Externí odkaz:
http://arxiv.org/abs/2308.10773
Multiply quantised vortices (MQVs) within single component Bose-Einstein condensates are unstable and decay rapidly. We show that MQVs can be stabilised by adding a small number of atoms of a second species to the vortex cores, and that these atoms r
Externí odkaz:
http://arxiv.org/abs/2304.11638
We collect and describe the observed geometrical and dynamical properties of turbulence in quantum fluids, particularly superfluid helium and atomic condensates for which more information about turbulence is available. Considering the spectral featur
Externí odkaz:
http://arxiv.org/abs/2302.05221
Drain vortices are among the most common vortices observed in everyday life, yet their physics is complex due to the competition of vorticity's transport and diffusion, and the presence of viscous layers and a free surface. Recently, it has become po
Externí odkaz:
http://arxiv.org/abs/2211.09589
Autor:
Barenghi, Carlo F.
Near absolute zero, superfluid liquid helium displays quantum properties at macroscopic length scales. One property, superfluidity, means flow with zero viscosity. Another property, the existence of a complex wavefunction, constrains the rotation to
Externí odkaz:
http://arxiv.org/abs/2207.04260