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Andrea's user avatar
Andrea's user avatar
Andrea
  • Member for 8 years, 11 months
  • Last seen more than a month ago
  • London
23 votes
6 answers
3k views

Can we interpret the Einstein field equations to mean that stress-energy *is* the curvature of spacetime?

11 votes
2 answers
785 views

Thermal radiation contains no information?

4 votes
1 answer
146 views

Exterior derivative for the electrostatics of a wormhole

4 votes
0 answers
82 views

Will the new LHC data falsify some theories? [closed]

3 votes
4 answers
3k views

How can I use a magnet to lift a paperclip?

3 votes
1 answer
155 views

$\nabla^2 A$ in terms of forms?

3 votes
1 answer
1k views

Second order perturbation of a degenerate system with no first order correction

2 votes
1 answer
745 views

Utility of the time-ordered exponential

2 votes
0 answers
49 views

What light "with no apparent material source" is Feynman referring to at the start of his Nobel lecture?

2 votes
2 answers
587 views

How do we measure distances in the FLRW metric?