Physics Questions, Problems & Solutions : TransWikia.com ~ Page 148

How to solve differential equation involving commutator and anti-commutator?

In one of my exercise, I got following differential equation for density matrix $rho$,$$frac{drho}{dt}=-i[H_1,rho]+{H_2,rho}$$where $H_1$ and $H_2$ are the Hermitian Hamiltonian, and...

Asked on 07/30/2021

1 answer

About the Lagrange equation involving Coulomb interaction

In the book by Prof Nagaosa, the Lagrange density was given by Eq. (1) (1) Then, according...

Asked on 07/30/2021

1 answer

Einstein's lightening-hit-train thought experiment

In Einstein's version the onboard observer sees the flash from the forward strike first because while the light from the strike was propagating he and the train moved forward toward...

Asked on 07/30/2021 by P. Martin

3 answer

Uncertainty of the past

If the future today can be described as a complex set of probabilistic wave functions which collapse to form our reality, is it possible that the past history of the...

Asked on 07/30/2021 by Joseph Hirsch

2 answer

Audible frequency of an air vent increases with distance: what's going on?

I was just standing near a loud air vent that was roughly at eye level and pointing downward. I noticed something strange about the noise it was making. The further...

Asked on 07/30/2021

1 answer

On Einstein inertial systems - Can you tell if you go upwards or downwards in a vertically "shot" elevator?

if we look at an elevator which is shot into the air - it is clear to me that e.g. two particles don't stay where they are (relative to one...

Asked on 07/30/2021

3 answer

Quantum mechanical analysis of kinetic isotope effect

The melting temperature $T_m$ and the boiling temperature of a substance $T_b$ of a substance and it's isotope are not the same. For example, if we consider water...

Asked on 07/30/2021

0 answer

Many worlds interpretation and probabilities

How is the many worlds interpretation (MWI) of QM consistent with the probabilistic interpretation of the wave function (given by Born's interpretation)? For example, say a particle has a 90%...

Asked on 07/30/2021

2 answer

Potential energy of a charge in a magnetic quadrupole field

I have a charged particle of charge $q$ that moves with velocity $vec{V}$ from a position $vec{r}$, inside a magnetic quadrupole field of the form: $$vec{B}=B_{0}(x,y,...

Asked on 07/30/2021 by Maxim s

1 answer

Finding roll/pitch/yaw for rotating local vector to another vector

Although I looked into similar questions regarding this subject, I could not make the link to my situation so correct me if the answer is already on StackExchange... My starting...

Asked on 07/30/2021 by Jeroen Boschma

0 answer

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