User Edward Hughes

64 votes

2 answers

7k views

Why do we expect our theories to be independent of cutoffs?

asked Aug 6, 2013 at 22:00

29 votes

5 answers

15k views

The Lagrangian in Scalar Field Theory

asked Oct 17, 2012 at 21:22

28 votes

2 answers

6k views

Why does the classical Noether charge become the quantum symmetry generator?

asked Aug 21, 2013 at 9:09

25 votes

1 answer

4k views

If renormalization scale is arbitrary, why do we care about running couplings?

asked Oct 16, 2013 at 15:55

23 votes

1 answer

2k views

The Origins of Instantons from Path Integrals

asked Oct 28, 2013 at 19:43

23 votes

2 answers

1k views

When are there enough Casimirs?

asked May 17, 2013 at 13:25

20 votes

1 answer

10k views

Local and Global Symmetries

asked Jan 2, 2013 at 22:21

18 votes

3 answers

8k views

PhD Research Areas in String Theory [closed]

asked Jul 25, 2012 at 10:03

17 votes

2 answers

5k views

Is the effective Lagrangian the bare Lagrangian?

asked Sep 30, 2013 at 14:17

16 votes

1 answer

3k views

Is Conformal Symmetry Local or Global?

asked Dec 27, 2013 at 23:21

15 votes

1 answer

3k views

Diffeomorphisms, Isometries And General Relativity

asked Dec 22, 2012 at 17:15

12 votes

3 answers

818 views

Etymology of "Renormalisation"

asked Jul 21, 2013 at 13:09

12 votes

1 answer

667 views

Can you take the cutoff to infinity at a conformal fixed point?

asked May 12, 2015 at 14:48

11 votes

1 answer

2k views

Representations of Lorentz Group

asked Dec 21, 2012 at 17:00

10 votes

1 answer

3k views

Charge Renormalization and Photon Propagator

asked Aug 3, 2013 at 10:09

10 votes

3 answers

3k views

Intuition for Path Integrals and How to Evaluate Them

asked Jan 5, 2013 at 15:50

10 votes

3 answers

6k views

Canonical Commutation Relations

asked Dec 6, 2012 at 17:51

8 votes

4 answers

7k views

Fermi's Golden Rule and Density of States

asked Dec 17, 2012 at 14:26

8 votes

2 answers

2k views

Number of Components of a Spinor

asked Dec 21, 2012 at 15:07

8 votes

1 answer

323 views

Are group representations possible when the solution space is not a vector space?

asked Feb 9, 2013 at 14:17

8 votes

1 answer

3k views

Scattering Processes in Scalar Yukawa Theory

asked Jan 2, 2013 at 13:42

8 votes

4 answers

729 views

What does "carry a representation" mean (in SUSY algebra)?

asked Sep 5, 2013 at 12:20

6 votes

2 answers

595 views

Quantum Anomalies in Non-Gauge Theories?

asked Aug 20, 2013 at 9:25

6 votes

2 answers

1k views

Why Goldstone Bosons? (A Question about VEVs)

asked Oct 22, 2013 at 22:20

6 votes

1 answer

2k views

Integral in Peskin and Schroeder

asked Jan 4, 2013 at 17:46

5 votes

1 answer

709 views

Equivalent Representations of Clifford Algebra

asked Dec 24, 2012 at 11:45

5 votes

1 answer

385 views

Why Must Conserved Currents of Lorentz Symmetry Satisfy the Lorentz Algebra?

asked Nov 19, 2012 at 22:27

5 votes

1 answer

597 views

Open String Coupling

asked Sep 3, 2012 at 8:51

5 votes

0 answers

221 views

What does $\text{VAC}$ mean in Weinberg's QFT?

asked Oct 17, 2013 at 18:03

4 votes

0 answers

115 views

Stability of D-Branes and Coupling to Fields

asked Aug 1, 2014 at 11:36

Stack Exchange Network

52 Questions

Why do we expect our theories to be independent of cutoffs?

The Lagrangian in Scalar Field Theory

Why does the classical Noether charge become the quantum symmetry generator?

If renormalization scale is arbitrary, why do we care about running couplings?

The Origins of Instantons from Path Integrals

When are there enough Casimirs?

Local and Global Symmetries

PhD Research Areas in String Theory [closed]

Is the effective Lagrangian the bare Lagrangian?

Is Conformal Symmetry Local or Global?

Diffeomorphisms, Isometries And General Relativity

Etymology of "Renormalisation"

Can you take the cutoff to infinity at a conformal fixed point?

Representations of Lorentz Group

Charge Renormalization and Photon Propagator

Intuition for Path Integrals and How to Evaluate Them

Canonical Commutation Relations

Fermi's Golden Rule and Density of States

Number of Components of a Spinor

Are group representations possible when the solution space is not a vector space?

Scattering Processes in Scalar Yukawa Theory

What does "carry a representation" mean (in SUSY algebra)?

Quantum Anomalies in Non-Gauge Theories?

Why Goldstone Bosons? (A Question about VEVs)

Integral in Peskin and Schroeder

Equivalent Representations of Clifford Algebra

Why Must Conserved Currents of Lorentz Symmetry Satisfy the Lorentz Algebra?

Open String Coupling

What does $\text{VAC}$ mean in Weinberg's QFT?

Stability of D-Branes and Coupling to Fields