Quantum Vortices resonate via whole number integars and replicate black hole energy

 “These structures have some interesting acoustic properties: they have acoustic resonances that depend on their rotation, so they sort of sing information about themselves,” said Alperin. “Mathematically, it’s quite analogous to the way that rotating black holes radiate information about their own properties.”

https://scitechdaily.com/giant-quantum-twisters-may-form-in-liquid-light-remarkable-similarities-with-black-holes/ 

  Now physicists have theoretically shown that in one-dimensional quantum fluids not one, but two types of sound waves can propagate. Both types of waves move at approximately the same speed, but are combinations of density waves and temperature waves.

 https://phys.org/news/2018-07-unusual-quantum-liquids.html

 Unlike classical fluids, superfluid helium supports two types of sound waves—a density wave and a temperature wave—which propagate at different velocities.

instead of one sound wave being a density wave and the other sound wave being a temperature wave, the two sound waves each combine characteristics of both density and temperature waves. This hybrid nature of sound waves in one-dimensional quantum liquids is different than the nature of sound waves in any other fluid, including liquid helium. In addition, the scientists showed that the two hybrid sound waves propagate at nearly equal speeds, with the difference in speed depending on the temperature.