User rainman

3 votes

Introduction to string theory

answered Jun 17, 2014 at 8:51

3 votes

How do I evalute $\langle n|x^2 |n\rangle$ using the annihilation and creation operators?

answered Apr 19, 2018 at 2:46

2 votes

Parity and the Dipole Operator for a Two-Level System

answered May 12, 2020 at 7:21

1 vote

$m$ in Klein-Gordon Equation

answered Feb 18, 2019 at 10:57

1 vote

Informal book on Classical Mechanics

answered Jun 19, 2014 at 16:43

1 vote

What is the third component of the isospin, $I_3$?

answered Jan 28, 2017 at 10:31

0 votes

Who is said to do Work, me or the body?

answered Feb 19, 2015 at 18:22

0 votes

Eigenkets in Interaction Picture

answered Feb 18, 2019 at 1:12

0 votes

Relation between Green’s functions and connected Green’s functions

answered Aug 30, 2020 at 4:54

0 votes

Delta Function Identity in Peskin & Schroeder

answered Oct 31, 2021 at 9:30

-1 votes

Relation between electric field and potential when we reverse $\vec{r}$

answered May 8, 2017 at 8:04

-2 votes

Relation between symmetry factors

answered Jun 14, 2013 at 14:34

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12 Answers

Introduction to string theory

How do I evalute $\langle n|x^2 |n\rangle$ using the annihilation and creation operators?

Parity and the Dipole Operator for a Two-Level System

$m$ in Klein-Gordon Equation

Informal book on Classical Mechanics

What is the third component of the isospin, $I_3$?

Who is said to do Work, me or the body?

Eigenkets in Interaction Picture

Relation between Green’s functions and connected Green’s functions

Delta Function Identity in Peskin & Schroeder

Relation between electric field and potential when we reverse $\vec{r}$

Relation between symmetry factors