User Olaf

33 votes

Good reading on the Keldysh formalism

answered Aug 26, 2011 at 19:10

27 votes

Online QFT video lectures

quantum-field-theory resource-recommendations

answered May 18, 2011 at 18:21

25 votes

Accepted

Evolution operator for time-dependent Hamiltonian

quantum-mechanics operators harmonic-oscillator hamiltonian time-evolution

answered Nov 29, 2012 at 18:45

22 votes

Quantum mechanics on a manifold

quantum-mechanics mathematical-physics differential-geometry topology

answered Feb 24, 2011 at 12:09

21 votes

Since radioactive material decays how is it possible that there is any left after 4.5 billion years?

radioactivity

answered Mar 18, 2011 at 16:24

18 votes

What would happen if you put your hand in front of the 7 TeV beam at LHC?

particle-physics biophysics estimation large-hadron-collider

answered Jan 21, 2011 at 9:48

13 votes

Accepted

Applications of the Feynman-Vernon Influence Functional

quantum-field-theory research-level path-integral feynman-diagrams non-equilibrium

answered Sep 22, 2011 at 12:53

12 votes

Reading list in topological QFT

quantum-field-theory mathematical-physics resource-recommendations topological-field-theory chern-simons-theory

answered Oct 24, 2012 at 11:13

12 votes

Accepted

Uses of the 'Golden Ratio' in Physics

soft-question

answered Mar 15, 2011 at 11:06

10 votes

Accepted

Equation of motion for the reduced density matrix

quantum-mechanics many-body time-evolution

answered Nov 14, 2011 at 13:49

10 votes

Other processes than formal power series expansions in quantum field theory calculations

quantum-field-theory mathematical-physics research-level regularization

answered Oct 11, 2011 at 16:39

10 votes

Reconciling topological insulators and topological order

condensed-matter topological-order topological-insulators

answered Jul 11, 2013 at 16:15

8 votes

Accepted

What are the uses of Hopf algebras in physics?

mathematical-physics renormalization hopf-algebra

answered Feb 23, 2011 at 16:41

7 votes

Accepted

Nomenclature of hadronic resonances

nuclear-physics terminology

answered Mar 21, 2011 at 22:15

7 votes

Impressions of Topological field theories in mathematics

quantum-field-theory mathematical-physics

answered Jan 14, 2011 at 14:07

7 votes

Accepted

U(1) Charged Fields

symmetry field-theory group-theory

answered May 15, 2012 at 20:42

7 votes

Accepted

First class and second class constraints

gauge-theory field-theory hamiltonian-formalism constrained-dynamics

answered Aug 13, 2012 at 18:59

5 votes

Accepted

Expectation value of time-dependent Hamiltonian

quantum-mechanics harmonic-oscillator hamiltonian perturbation-theory time-evolution

answered Dec 9, 2012 at 17:28

4 votes

Supersymmetry in Quantum Field Theory

supersymmetry resource-recommendations

answered Jun 19, 2012 at 13:17

3 votes

RG of the Gaussian Model: Finding the scaling factor

statistical-mechanics renormalization

answered Nov 25, 2011 at 18:20

3 votes

Can the Heisenberg interpretation or path integrals apply to open quantum systems?

quantum-mechanics quantum-interpretations

answered Dec 15, 2011 at 17:35

3 votes

Results for the path integral formalism for a system with known start and end configuration?

path-integral

answered Feb 9, 2012 at 17:21

3 votes

Accepted

How do derive this result in stat-mech style

statistical-mechanics statistics

answered Nov 15, 2011 at 16:22

2 votes

Temperature of a System of molecules

statistical-mechanics temperature

answered Jan 22, 2011 at 10:48

2 votes

Accepted

Isn't it incorrect for the minimal gauge coupling and related calculations in Prof. Ezawa's book on quantum Hall effect?

quantum-mechanics quantum-hall-effect

answered Nov 23, 2012 at 15:44

2 votes

Accepted

Inverse of a sum of two easy matrices

operators eigenvalue

answered Jun 8, 2012 at 15:48

1 vote

Symmetries of a Free Massless Scalar in Two Dimensions

symmetry conformal-field-theory

answered Jan 2, 2013 at 11:01

1 vote

An integral related to QFT

homework-and-exercises quantum-field-theory fourier-transform integration

answered Nov 22, 2011 at 17:54

0 votes

Special relativity version of Feynman's "Space-Time Approach to Non-Relativistic Quantum Mechanics"

quantum-mechanics quantum-field-theory special-relativity

answered Jan 21, 2011 at 19:43

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29 Answers

Good reading on the Keldysh formalism

Online QFT video lectures

Evolution operator for time-dependent Hamiltonian

Quantum mechanics on a manifold

Since radioactive material decays how is it possible that there is any left after 4.5 billion years?

What would happen if you put your hand in front of the 7 TeV beam at LHC?

Applications of the Feynman-Vernon Influence Functional

Reading list in topological QFT

Uses of the 'Golden Ratio' in Physics

Equation of motion for the reduced density matrix

Other processes than formal power series expansions in quantum field theory calculations

Reconciling topological insulators and topological order

What are the uses of Hopf algebras in physics?

Nomenclature of hadronic resonances

Impressions of Topological field theories in mathematics

U(1) Charged Fields

First class and second class constraints

Expectation value of time-dependent Hamiltonian

Supersymmetry in Quantum Field Theory

RG of the Gaussian Model: Finding the scaling factor

Can the Heisenberg interpretation or path integrals apply to open quantum systems?

Results for the path integral formalism for a system with known start and end configuration?

How do derive this result in stat-mech style

Temperature of a System of molecules

Isn't it incorrect for the minimal gauge coupling and related calculations in Prof. Ezawa's book on quantum Hall effect?

Inverse of a sum of two easy matrices

Symmetries of a Free Massless Scalar in Two Dimensions

An integral related to QFT

Special relativity version of Feynman's "Space-Time Approach to Non-Relativistic Quantum Mechanics"