97 reputation
5
bio website thenestofheliopolis.blogspot.…
location Glasgow, United Kingdom
age 27
visits member for 3 years, 5 months
seen Jul 9 '13 at 9:58

Jul
8
awarded  Scholar
Jul
8
comment Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
This is exactly what I was looking for! Thank you!
Jul
8
accepted Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
Jul
7
comment Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
One such reference may be the book of Bogoliubov et al., General Principles of Quantum Field Theory, specifically the discussion that follows Proposition 8.1.
Jul
7
comment What is the Lagrangian for a relativistic charge that includes the self-force?
Potential energy enters into the Lagrangian...
Jul
6
answered What is the Lagrangian for a relativistic charge that includes the self-force?
Jul
6
comment If you view the Earth from far enough away can you observe its past?
Mirrors are a good idea, but unfortunately any actual mirror can't reflect 100% of the incoming radiation. But as far as a theoretical speculation goes, we can also consider gravitational lensing...
Jul
5
awarded  Student
Jul
4
comment Understanding Heat
Still I don't get what you mean by "frequency" in this context. Can you explain please?
Jul
3
comment Understanding Heat
I'm sorry but I don't really get your comment. What do you mean by "sufficient frequency"? Also I don't get the asteroid example. If the asteroid is travelling at constant speed w.r.t the remote stars than there must be a frame of reference where the asteroid is not moving...
Jul
3
comment Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
Yes I'm considering the Fock representation of the local field algebras. As I have said in the question, it is known that when $O$ is bounded the field algebra $\mathfrak F(O)$ in the Fock representation is not irreducible, but I fail to see this.
Jul
3
comment Understanding Heat
What I was trying to say is that you have to hit a rod of steel with a hammer to produce an audible sound, and this is way more than just a few eV. In this regime you can surely apply classical mechanics.
Jul
2
awarded  Teacher
Jul
2
awarded  Supporter
Jul
2
answered Understanding Heat
Jul
2
answered Objects in Physics as a mathematician would see them
Jul
2
asked Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
Jul
2
awarded  Autobiographer