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Physics : Recent Questions and Answers (Page 679)

Find answers to your questions about Physics or help others by answering their Physics questions.

Trying to solve 2D Toda Lattice Equation with Lax Pair Approach

I am working on this Hamiltonian:$$ H = frac{p_1^2 + p_2^2}{2m} + e^{q_2-q_1} + e^{q_2} + e^{-q_1} -3 $$Thank you for the hint that it is a modification...

Asked on 01/04/2021 by varantir

1 answer

Effective Hamiltonian for Transmission Coefficient

Suppose we have a ring resonator. For the m-th resonant mode, its wave vector along the waveguide $beta_{m}$ satisfies $left(beta_{m}-beta_{0}right) L=2 pi m$. where L is the circumference...

Asked on 01/04/2021 by Aubrey Sharansky

0 answer

How the wing creates lift? Why critical angle of attack is 16.5" for a supersonic jet and a kite?

I have seen many references on how the wings create lift, most of them overplaying effect of Bernoulli's rule.But nowhere has there been any consideration given to this important...

Asked on 01/04/2021

1 answer

For a radially symmetric wavefunction is $Psi$ allowed to blow up at $r=0$ provided that $|Psi|^2r^2$ doesn't?

For a spherically symmetric wavefunction the probability is proportional to $|Psi|^2r^2$, and if the wave function blows up at $r=0$ then at $r=0$ $|Psi|^2=infty$, and ...

Asked on 01/04/2021

2 answer

Angular Momentum Eigenfunction

Given that $hat{L}_z psi = bar{h}m psi$, how to compute $langle hat{p}_x rangle_{psi}$ ?...

Asked on 01/04/2021 by Kananart Kuwaranancharoen

0 answer

What is the analogue for symplectic structure in case of spin variables?

According to some (e.g. Haroche and Raimond in Exploring the quantum: atoms, cavities and photons), the quantum world consists (mainly) of spins and harmonic oscillators. For harmonic oscillators (i.e. bosons),...

Asked on 01/04/2021

2 answer

How to determine the direction of the induced current or direction of induced magnetic field in a coil from a permanent magnet?

So the inducing magnetic field points upwards since the field travel south to north in a magnet. The inducing magnetic...

Asked on 01/04/2021

1 answer

Is is true that if you could see and track every atom there is, you could see the entire history of the universe?

https://www.youtube.com/watch?v=yWO-cvGETRQ Is is true that if you could see and track every atom there is, you could see the entire history of the universe? I thought that...

Asked on 01/04/2021 by brochen

0 answer

Solutions to damped harmonic oscillator?

For the damped harmonic oscillator equation$$frac{d^2x}{dt^2}+frac{c}{m}frac{dx}{dt}+frac{k}{m}x=0$$we get that the general solution is$$x(t)=Ae^{-gamma t}e^{iomega_d t}+Be^{-gamma t}e^{-iomega_d t}$$where $gamma = frac{c}{2m}$ and $...

Asked on 01/04/2021

2 answer

Calculating the reduced density matrix of two separate experiments

Consider setting up two experiments $alpha $ and $beta$. In experimental setup $alpha$ we can prepare $n$ possible pure states ${| psi_1 rangle, | psi_2...

Asked on 01/04/2021

1 answer

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