Quantum gravity

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Pythagoras0 (토론 | 기여)님의 2020년 12월 27일 (일) 23:52 판 (→‎메타데이터: 새 문단)
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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?

 

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