• Source: Analog models of gravity

Analog models of gravity are attempts to model various phenomena of general relativity (e.g., black holes or cosmological geometries) using other physical systems such as acoustics in a moving fluid, superfluid helium, or Bose–Einstein condensate; gravity waves in water; and propagation of electromagnetic waves in a dielectric medium. These analogs (or analogies) serve to provide new ways of looking at problems, permit ideas from other realms of science to be applied, and may create opportunities for practical experiments within the analog that can be applied back to the source phenomena.




History


Analog models of gravity have been used in hundreds of published articles in the last decade. The use of these analogs can be traced back to the very start of scientific theories for gravity, with Newton and Einstein.




Bose-Einstein condensates


It has been shown that Bose-Einstein condensates (BEC) are a good platform to study analog gravity. Kerr (rotating) black holes have been implemented in a BEC of exciton-polaritons (a quantum fluid of light).




Analog Gravity Models with Surface Gravity Waves


Surface gravity waves have been recognized as a promising system for studying analog gravity models. Recent experiments have demonstrated that these waves can effectively simulate phase space horizons, drawing parallels to black hole physics. Specifically, the use of surface gravity water waves has enabled the observation of logarithmic phase singularities and the onset of Fermi-Dirac distributions, phenomena typically associated with quantum systems and gravitational theories. This approach provides valuable insights into the analogies between classical wave systems and quantum mechanical behaviors, expanding the possibilities for exploring gravitational analogs in a controlled laboratory environment.




See also


Acoustic metric
Transformation optics
Optical metric#Analogue gravity
Optical black hole
Sonic black hole




References

Kata Kunci Pencarian:

• Stephen Hawking
• Korespondensi anti-de Sitter/teori medan konformal
• Analog models of gravity
• Sabine Hossenfelder
• Gravity wave
• Sonic black hole
• Hawking radiation
• Weinberg–Witten theorem
• Acoustic metric
• Analog computer
• Optical black hole
• Entropic gravity