Zobrazeno 1 - 10
of 245
pro vyhledávání: '"Carlo F. Barenghi"'
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033201 (2023)
Multiply quantized vortices (MQVs) within single-component Bose-Einstein condensates are unstable and decay rapidly. We show that MQVs can be stabilized by adding a small number of atoms of a second species to the vortex cores, and that these atoms r
Externí odkaz:
https://doaj.org/article/d6cc1ff5c924491caec2886463639789
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043104 (2022)
We show that the dynamical instability of quantum vortices with more than a single unit of circulation results from a superradiant bound state inside the vortex core. We then reveal a striking behavior of the system in the nonlinear regime. Counter t
Externí odkaz:
https://doaj.org/article/6176bdeea05242479fc2b9b68ebab04f
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033117 (2022)
Vortices and black holes set the scene for many interesting dynamical processes in physics. Here, we study the dynamical instability of quantized vortices and rotational superradiance around rotating black holes, illustrating in the process that the
Externí odkaz:
https://doaj.org/article/c6e11f8d0e7b4fad853f57a79f21c0aa
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023099 (2022)
We investigate wave-vortex interaction emerging from an expanding compact vortex cluster in a two-dimensional Bose-Einstein condensate. We adapt techniques developed for compact gravitational objects to derive the characteristic modes of the wave-vor
Externí odkaz:
https://doaj.org/article/e7d1655cfc6041799046d9d0b3d10c12
Autor:
Simone Serafini, Luca Galantucci, Elena Iseni, Tom Bienaimé, Russell N. Bisset, Carlo F. Barenghi, Franco Dalfovo, Giacomo Lamporesi, Gabriele Ferrari
Publikováno v:
Physical Review X, Vol 7, Iss 2, p 021031 (2017)
Reconnections and interactions of filamentary coherent structures play a fundamental role in the dynamics of fluids, redistributing energy and helicity among the length scales and inducing fine-scale turbulent mixing. Unlike ordinary fluids, where vo
Externí odkaz:
https://doaj.org/article/be6e934b845d4555a3cbda3db32a077e
Publikováno v:
Physical Review Fluids. 8
When the intensity of turbulence is increased (by increasing the Reynolds number, e.g. by reducing the viscosity of the fluid), the rate of the dissipation of kinetic energy decreases but does not tend asymptotically to zero: it levels off to a non-z
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b04845b7cc84e625b5ea1309571e3bf7
https://doi.org/10.1103/physrevfluids.8.034605
https://doi.org/10.1103/physrevfluids.8.034605
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 499:161-170
Pulsar glitches offer an insight into the dynamics of superfluids in the high density interior of a neutron star. To model these phenomena, however, one needs to have an understanding of the dynamics of a turbulent array of superfluid vortices moving
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e05ee21b57faeef04eaaf3c85a91d10e
https://doi.org/10.1093/mnras/staa2678
https://doi.org/10.1093/mnras/staa2678
Experiments in the early 1980s have shown that a compact bundle of quantum vortex rings in superfluid helium remains coherent and travels a significant distance compared to its size. This is surprising because a single vortex ring, under the effect o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0b8f1961fd730d207188e02d741fcb3
https://hal.sorbonne-universite.fr/hal-03443329
https://hal.sorbonne-universite.fr/hal-03443329
Autor:
Carlo F. Barenghi, Ladislav Skrbek
Publikováno v:
Europhysics News. 52:25-27
Quantum turbulence, which manifests itself via a tangle of quantized vortices, occurs in quantum fluids, whose properties depend on quantum physics rather than classical physics. Here we report on two limiting forms of quantum turbulence which have b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8845acbda6308333ab77528fe761481
https://doi.org/10.1051/epn/2021305
https://doi.org/10.1051/epn/2021305
Publikováno v:
Proceedings of the National Academy of Sciences. 116:12204-12211
Reconnections of coherent filamentary structures play a key role in the dynamics of fluids, redistributing energy and helicity among the length scales, triggering dissipative effects and inducing fine-scale mixing. Unlike ordinary (classical) fluids
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b0b36f661018eefa0652ee17f756e2a
https://doi.org/10.1073/pnas.1818668116
https://doi.org/10.1073/pnas.1818668116