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nervxxx
  • Member for 11 years, 4 months
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51 votes

First and second order phase transitions

19 votes
Accepted

What is the Lagrangian from which the Klein-Gordon equation is derived in QFT?

15 votes
Accepted

Product of exponential of operators

14 votes

Gravity in other than 3 spatial dimensions and stable orbits

11 votes
Accepted

Interpretation of the 1D transverve field Ising model vacuum state in a spin-language

9 votes
Accepted

Scalar two loop diagram in $\varphi^4$ theory

9 votes

Does the mass point move?

8 votes

Iterative projection into ground state

7 votes
Accepted

Kinetic energy of a photon and Schwarzschild radius

6 votes
Accepted

Lorentz invariance of the wave equation

5 votes

Linearized equations

5 votes
Accepted

What is the Riemann curvature tensor contracted with the metric tensor?

5 votes

Deriving the Lagrangian for a free particle

5 votes
Accepted

Suppose a hollow metal sphere filled with helium is dropped in a body of water

5 votes
Accepted

Is it possible for an object to stop sinking after a while?

4 votes
Accepted

block slides on smooth triangular wedge kept on smooth floor.Find velocity of wedge when block reaches bottom

4 votes
Accepted

where did I lose the negative sign when spring is in compression in a mass-spring problem?

4 votes
Accepted

How do we know that $\psi$ is the eigenfunction of an operator $\hat{H}$ with eigenvalue $W$?

4 votes

Angular momentum conservation while internal frictional torque is present

4 votes
Accepted

A very elementary question regarding force of friction

4 votes
Accepted

Deriving the conservation of mass in a perfect fluid

4 votes

Notational techniques for dealing with creation operators on Fock space

4 votes

Where does this derivation of the equation of motion for a simple pendulum go wrong?

3 votes
Accepted

Raising indices in Killing equation or not?

3 votes
Accepted

Spinor inner products

3 votes
Accepted

Deriving a QM expectation value for a square of momentum $\langle p^2 \rangle$

3 votes
Accepted

One-loop $\phi^4$ theory in $d = 3$

3 votes

Quantum Chemistry Kronecker Delta formality

3 votes
Accepted

Gravitational redshift derivation

3 votes

Contact force betweeen 2 objects