2,886 reputation
717
bio website about.me/danieldf
location Providence, RI
age 37
visits member for 3 years, 5 months
seen Feb 22 '13 at 21:12

Mar
10
answered Time as a Hermitian operator in QM?
Mar
10
awarded  Nice Answer
Mar
9
answered Gravity theories with the equivalence principle but different from GR
Mar
9
awarded  Quorum
Mar
9
answered Rigor in quantum field theory
Mar
8
revised Explaining Arrow of Time with Entropy
added 169 characters in body
Mar
7
comment An alternative, algebraic way to introduce interactions. Are there other ways out there?
@Peter: can you expand a bit your comments about the Buchholz-Lechner-Summers? I'm not sure whether we're both make the same reading of that paper.
Mar
7
answered Explaining Arrow of Time with Entropy
Mar
7
answered Is there an accepted analogy/conceptual aid for the Higgs field?
Mar
7
awarded  Citizen Patrol
Mar
7
answered Why does dilation invariance often imply proper conformal invariance?
Mar
3
comment How does gravity escape a black hole?
Sure, you're probably right. But, i'd rather not use any more than i have to (in terms of assumptions or extra estructure): if you can answer with some sort of 'minimum' set of assumptions, why 'complicate' the problem — and have to deal with the consequences of said 'complications' later? ;-)
Feb
15
comment How does gravity escape a black hole?
@Daniel Grumiller: In more general grounds, you don't need to agree with nor anyone else. But, in this particular case, the reason is pretty straightforward: because it's possible to answer the original question without having to talk about a possible quantization of GR. To appropriately and scientifically answer the original question, taking gravitons into account, sooner or later one would have to compute the scattering of light by gravitons (and vice-versa), which would immensely complicate an otherwise simpler answer.
Feb
12
awarded  Nice Answer
Feb
11
awarded  Nice Answer
Feb
3
awarded  Announcer
Feb
3
answered Haag's theorem and practical QFT computations
Feb
2
answered twistor-spacetime correspondence
Feb
2
comment How could spacetime become discretised at the Planck scale?
@qftme: i didn't mean to bury you in refs, sorry if i gave that impression. But your questions were so 'open ended' that i didn't know a better way to address them (but to point you towards more comprehensive papers).
Feb
2
answered Your favorite Physics/Astrophysics blogs?