meta user
network profile
| bio | website | |
|---|---|---|
| location | Belgium | |
| age | ||
| visits | member for | 2 years, 7 months |
| seen | 10 hours ago | |
| stats | profile views | 601 |
"I would never die for my beliefs because I might be wrong."
-- Bertrand Russell
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Jun 3 |
answered | Why is the Big Bang the biggest explosion in the universe? |
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Jun 3 |
answered | Having a problem about entropy, thermodynamics |
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Jun 3 |
comment |
Density of states of a photon gas in volume V and temperature T Your formula also implies there are only two photons possible in your system. But the thing is photon systems can have an arbitrary number of them. Of course, taking into account quantization, for each frequency or momentum, only discrete multiples of the corresponding energy will be accessible. Also, you are making a computation for the microcanonical ensemble with fixed energy. They are asking for a canonical ensemble with fixed temperature. And since photon number is not fixed, it's even grand canonical. |
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Jun 3 |
comment |
Density of states of a photon gas in volume V and temperature T To begin with, if $p$ is momentum, why is there an $\hbar$ in your first formula? One should have $E^2-p^2c^2=0$ for photons. |
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May 26 |
awarded | Nice Answer |
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Jan 27 |
comment |
Is Dr Quantum's Double Slit Experiment video scientifically accurate? Maybe you could explain to me what the delayed choice quantum erasure changesto the problem? Because just saying it makes a difference doesn't quite cut it. |
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Jan 3 |
awarded | Nice Answer |
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Jan 1 |
comment |
Why is quantum entanglement so important? I'm sure you're right about what he had in mind. But that should not be for us to guess. |
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Dec 30 |
comment |
Why is quantum entanglement so important? Unfortunately, your example is not an example of entanglement. It's not even clear to me there are correlations involved. Antiparallel spins can be represented as: $|\uparrow\downarrow\rangle$. |
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Dec 9 |
awarded | Constituent |
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Nov 26 |
awarded | Caucus |
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Nov 12 |
awarded | Yearling |
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Oct 26 |
comment |
When and how do you represent a two body state as a tensor product? @Jim: Does this help? The tensor product $L^2(\mathbb{R}^3)\otimes L^2(\mathbb{R}^3)$ is isomorphic to $L^2(\mathbb{R}^3\times\mathbb{R}^3)$. And the cartesian product is $\mathbb{R}^3\times\mathbb{R}^3=\mathbb{R}^6$. |
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Oct 15 |
revised |
Schrödinger equation with complex potential deleted 7 characters in body |
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Oct 14 |
comment |
The equation of a ferrofluid under a magnetic field? You won't need the full Navier-Stokes equations since the problem is static. Neither will you need the full Maxwell equations. That should simplify the problem a lot. You'll also need equations describing the interaction between the ferrofluid and the field. |
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Sep 24 |
comment |
Can we have discontinuous wavefunctions in the Infinite Square well? It probably makes sense if you extend the meaning of the Schrödinger equation in terms of distributions. |
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Sep 15 |
awarded | Pundit |
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Sep 13 |
comment |
Calculation of Distance from measured Acceleration vs Time If you are only interested in vertical displacement, you only need vertical acceleration as well. Can you show us what you did? |
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Sep 4 |
comment |
3 inertial frames compared in STR No, $(x_1, t_1)=(x_2, t_2)=(x,t)$. |
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Sep 1 |
comment |
Would it be possible to develop special relativity without knowing about light? It's easy to imagine. A blind man can use a radio to communicate. But radios transmit signals using the electromagnetic spectrum. So even an observer who can only detect things via sound would eventually discover that the true "speed limit" is the speed of light. |
