6,326 reputation
21235
bio website
location
age
visits member for 3 years, 3 months
seen 4 hours ago

I once got busy in a Burger King bathroom.


Mar
26
awarded  Electorate
Mar
19
comment The physics community's take on noncommutative geometry
clap clap clap!
Mar
18
comment BICEP2 and string theory
anecdata: The string theorists I know are delighted about this result.
Mar
18
comment Picture of supports
I don't want to discourage you, but you have misunderstood what $f$ and $g$ mean in this context. The OP is asking about the smeared operator $\phi(f) = \int f(x) \phi(x) dx$.
Mar
18
answered Picture of supports
Mar
15
answered Effect of linear terms on a QFT
Mar
8
comment From representations to field theories
@PedroLauridsenRibeiro: My comment was directed at Julio. I'm not arguing that representations determine a Lagrangian. This fails even for the 2d chiral boson.
Mar
7
answered Are “confinement” and “asymptotic freedom” two sides of the same coin?
Mar
7
comment From representations to field theories
You can make a much stronger statement: The representations do not uniquely determine a Lagrangian. You have to add other assumptions to get dynamical laws.
Mar
7
comment From representations to field theories
Seems worth mentioning that Brunetti et al only construct free fields, as it's not clear if the OP thinks that the representations uniquely determine the dynamics.
Mar
4
comment Do gamma matrices form a basis?
What is the dimension of the space of matrices?
Mar
3
comment Is it possible to restart formal higher education in physics at a later age?
Also, Ed Witten didn't turn his attention to physics until after finishing his undergrad degree and working for a year in politics.
Mar
1
comment Dirac equation in QFT vs relativistic QM
Specifically which problem are you asking about? This question is quite vague.
Feb
25
comment What does “mathematically well defined” quantum field theory mean?
physics.stackexchange.com/q/77143
Feb
21
answered Physics history book with some math
Feb
15
awarded  Good Answer
Feb
5
comment Local and Global Symmetries
@Friedrich: For brevity, I'll explain in classical physics. If you have a group $G$ acting on the space $H$ of histories, to 'gauge' $G$ means to consider a different classical system whose space of histories is the quotient $H/G$.
Feb
4
reviewed Approve suggested edit on Formula for critical mass? Critical mass of polonium?
Feb
4
answered Quantum Field Theory and antiparticles vs particles
Feb
3
comment interaction of mathematical structures (rephrased)
One question per post please.