Strings that can vibrate forever (almost)

Strings that can vibrate forever (kind of)
  https://www.sciencedaily.com/releases/2024/05/240522130402.htm
Source:
 Delft University of Technology
Summary:
 Researchers have engineered string-like resonators capable of vibrating longer at ambient temperature
 than any previously known solid-state object -- approaching what is currently only achievable near absolute zero temperatures.
 Their study pushes the edge of nanotechnology and machine learning to make some of the world's most sensitive mechanical sensors.

Interesting for inertial navigation!

Mechanical 214 kHz resonator with a Q of 6.6 billion at room temperature
 see paper:
  https://www.nature.com/articles/s41467-024-48183-7
   figure 4