Quantum gravity

Puzzles of (quantum) gravity

• The effective, semiclassical theory of gravity has raised lots of fascinating questions, some old and some new:
  
  • is gravity really just the dynamics of spacetime geometry?
  • why do we live in a huge universe?
  • what becomes of spacetime at shortest distances?
  • is there a statistical explanation of black-hole entropy?
  • is spacetime physics holographic?
  • what is the nature of dark matter and dark energy { is it exotic matter, exotic gravity, or perhaps a mixture of both?
  • in the end, do we modify gravity and relativity, or do we modify quantum mechanics, or perhaps both?

 

하위페이지

• quantum gravity
  
  • loop gravity