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Feb2313 08:38 AM
ZapperZ

1 
34,274 
(1,a^2,a^2,a^2)) from the action; \mathcal{S}_{D} = \int d^4 x \det(e^{\alpha}_{\mu}) \left
I can show that,...

Mar2313 01:19 PM
pleasehelpmeno

6 
803 
In quantum mechanics what quantities are actually measured? Measurements of voltage and current are macroscopic...

Mar2313 08:00 AM
friend

4 
726 
Hi, I've been curious about his subject for quite a while now, and I figure I need to ask here in these forums to get...

Mar2213 06:34 PM
jlefevre76

0 
559 
Hi there,
This should be very simple...
If I have a state <1AB2> where A and B are Hermitian operators, can I...

Mar2213 05:51 PM
raymo39

6 
695 
So I definitely believe that the continuity of the Dirac equation holds, there is one thing that annoys me, which is...

Mar2213 10:14 AM
andrien

1 
578 
Is there some mathematical prove that for ground state in QM problems wave function doesn't have any zeros?

Mar2213 09:04 AM
DrDu

15 
953 
Do you believe that "conscious" observation has anything to do with "collapsing" superimposed quantum states, or do...

Mar2213 05:51 AM
HomogenousCow

7 
983 
I was talking with a friend earlier today about the idea that at absolute zero, particles essentially stop moving. I...

Mar2213 03:26 AM
DrDu

5 
2,013 
Hi,
I've seen quite a few textbooks and lectures start by saying something like "to solve a quantum system of N...

Mar2213 03:07 AM
cgk

8 
1,159 
Hello, all,
I have a question about the wave functions of H atom: for p orbital, wave functions from the...

Mar2213 03:03 AM
DrDu

11 
1,091 
ψ(x,t)2 is the probability density.
Probabilities are dimensionless.
What would the SI units of ψ(x,t) be,...

Mar2113 06:09 PM
Jazzdude

5 
988 
Let's say if general relativity is wrong. What is then the problem of unifying gravity with quantum mechanics? Is...

Mar2113 03:56 PM
Fredrik

16 
1,385 
Can anyone give me a brief introduction?
Thanks!

Mar2113 03:12 PM
fzero

1 
356 
How should I think about symmetry currents?... in particular, when there are no fields to "carry the charge", eg in a...

Mar2113 01:17 PM
Tarti

3 
586 
This may be a basic question, but it's something I'm having a hard time understanding. The Wikipedia article I am...

Mar2113 12:44 PM
Bill_K

18 
1,338 
In problem of infinite potential well particle can't be in a region where ##V=\infty##. How we know that in case of...

Mar2113 09:25 AM
mfb

9 
880 
In a Griffith's book (page 1516) an author derives a momentum operator. In the derivation he states that he used a...

Mar2113 05:07 AM
DimReg

10 
1,270 
I'm currently working on a paper dealing with aspects of FranckHertz experiment, and encountered some puzzling...

Mar2113 03:14 AM
bentzy

8 
604 
I was told that the pauli exclusion principle states that no two electrons in an atom can have the same quantum...

Mar2013 02:30 PM
Marioeden

4 
628 
So (a><a)† = a><a

Mar2013 12:46 PM
NegativeDept

2 
699 
Ok so I'm currently revising my quantum theory course from this year and I've reached the section on the postulates...

Mar2013 09:06 AM
QuantumMoose

4 
659 
When solving the three dimensional Schrödinger equation, we obtain a probability distribution on θ. But it seems like...

Mar2013 08:39 AM
tinytim

5 
803 
Suppose I'm considering particles of mass \mu_i, 1 \leq i \leq 3, located at positions r_i. Suppose I ignore the...

Mar2013 01:42 AM
tom.stoer

1 
481 
good afternoon i want to learn the following topics in the lucid way:
eigen value,eigen function and related problems...

Mar2013 01:31 AM
NegativeDept

7 
1,040 
Hi
This is help from lectures on quantum computing that I missed due to illness and now my professor is away.
...

Mar2013 12:58 AM
NegativeDept

1 
519 
Hello I am a second year student and i am starting to learn about quantum world. I am in biochem programm so quantum...

Mar1913 11:08 PM
Fredrik

1 
494 
Just to clarify in the dirac equation (i\gamma^{\mu}\partial_{\mu} m)\psi=0
Is it equal to ...

Mar1913 01:14 PM
Bill_K

1 
479 
Hi I tried to post this before but it got messed up. hopefully it doesn't post twice. I'm new to this forum and signed...

Mar1913 11:40 AM
berkeman

3 
650 
Contrary to a classical vacuum, particles tend to pop into and out of existence in a quantum vacuum. When analyzing a...

Mar1813 11:59 PM
NATURE.M

2 
523 
I am working through the Griffiths QM text and I am getting caught up on some the process he uses to derive the wave...

Mar1813 06:56 PM
klawlor419

2 
458 
I am new to this area, so pardon me if the below question might seem.....
1. What area/subject/subtopic of physics...

Mar1813 05:00 PM
Maui

9 
1,063 
If electron waves weren't standing waves in Bohr's circular orbit, why and how would the waves interfere ?

Mar1813 11:11 AM
vanhees71

1 
444 
I have noticed that while we study the case where, E>Vo, and we write the wave functions in both regions, we don't...

Mar1813 10:59 AM
LagrangeEuler

1 
869 
Imagine that an excited hydrogen atom in the symmetric 2s state emits a photon.
We use a birefringent crystal to...

Mar1813 06:52 AM
johne1618

5 
686 
(ignore original title, in fact id appreciate if a mod would change it. It was not my intention to have a conversation...

Mar1813 05:39 AM
DaleSpam

16 
470 
I have a basic understanding of what particle spin is, but I'm not clear on how how integer spins are different than...

Mar1713 05:53 PM
Simon Bridge

5 
725 
In a resonant matter wave box using λ=h/p i want to teleport to a point. do i put said point at a node or antinode?

Mar1713 02:03 PM
sprice37

0 
503 
Void

Mar1713 01:08 PM
thatoneguy123

0 
357 
Firstly my knowledge of science is armchair tv level so any overly complicated explanations will be lost on me.
...

Mar1713 11:14 AM
Nugatory

3 
695 
"The Heisenberg picture does not distinguish time from space, so it is better for relativistic theories than the...

Mar1713 09:05 AM
A. Neumaier

20 
2,167 