منابع مشابه
Characterization of reconnecting vortices in superfluid helium.
When two vortices cross, each of them breaks into two parts and exchanges part of itself for part of the other. This process, called vortex reconnection, occurs in classical and superfluids, and in magnetized plasmas and superconductors. We present the first experimental observations of reconnection between quantized vortices in superfluid helium. We do so by imaging micrometer-sized solid hydr...
متن کاملSuperfluid helium quantum interference devices
We present an overview of recent developments related to superfluid helium quantum interference devices (SHeQUIDs). We discuss the physics of two reservoirs of superfluid helium coupled together and describe the quantum oscillations that result from varying the coupling strength. We explain the principles behind SHeQUIDs that can be built based on these oscillations and review some techniques a...
متن کاملVortices in Nonlocal Condensate Models of Superfluid Helium
Helium Natalia G. Berloff and Paul H. Roberts Department of Mathematics University of California, Los Angeles, CA, 90095-1555 [email protected], [email protected], Abstract. Nonlocal nonlinear Schrödinger equations are considered as models of superfluid helium. The models contain a nonlocal interaction potential that leads to a phonon-roton-like dispersion relation. It is shown that fo...
متن کاملThe Effects of Cell Perturbations on Superfluid Helium Vortices
Helium is unique among the elements in that it does not freeze at low temperatures and pressures, remaining a liquid all the way down to absolute zero at standard pressure. It also has the lowest boiling point, 4.22 K[1], and is the only element to has a superfluid phase transition (2.17 K). While a solid phase does exist, it requires extreme pressure, around 25 atmospheres. A phase diagram for...
متن کاملSatellite magnetic resonances of a bound pair of half-quantum vortices in rotating superfluid 3He-A.
The transverse magnetic resonance satellite frequency and intensity associated with a bound pair of half quantum vortices in a thin slab of 'He-A, rotating about the slab normal and subject to a magnetic field applied at an angle 0 with the slab normal, is recalculated in a variational approach. This approach takes properly into account the azimuthal symmetry of the spin wave function and there...
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ژورنال
عنوان ژورنال: Physics
سال: 2016
ISSN: 1943-2879
DOI: 10.1103/physics.9.148