Questions tagged [superconductivity]
Superconductivity is the transmission of current with no resistive losses, and is one of the most active areas of condensed matter physics research.
1,306
questions
-1
votes
2
answers
94
views
Will a computer itself consume any energy if placed under super-conducting conditions?
By definition, any electronic circuits placed under super-conducting conditions (very low temperatures) will not dissipate energy to the surroundings as the resistance is 0.
If a computer was placed ...
- 605
-1
votes
2
answers
396
views
Why don't perpetual motion machines with superconducting magnets work?
A superconducting magnet works by energizing a superconducting magnetic coil, then short circuiting it to make a closed loop. Would it be possible to transfer the current back and forth between two ...
- 11
-1
votes
1
answer
104
views
How can I can solution to BCS gap eq. around critical point $T_c$?
The BCS gap equation is $$1=gn\int_0^{\Delta\epsilon} d\epsilon \frac{1}{\sqrt{\epsilon^2+\Delta^2}}\tanh\frac{\sqrt{\epsilon^2+\Delta^2}}{2kT}.$$ At the critical point, we have $\Delta=0$, therefore ...
- 3
-1
votes
1
answer
623
views
Can electrons be isolated from atoms?
Can electrons be isolated from atoms? If its possible,why cant we isolate pile of electrons and put them in a vaccum container,if we can do this we can achieve super conductance because there are no ...
- 507
-1
votes
1
answer
950
views
What type of superconductors does Maglev train use and why? [closed]
I would like to find out what type of superconductors does the Maglev train use and why is this is this specific type? As I cannot find it anywhere on the net.
Thank you!
-1
votes
1
answer
58
views
Could someone explain this paragraph?
"Although Arnold Sommerfeld’s theories had used quantum mechanics, his focus had been on the probability of the electron distribution. The phases of the individual wavefunctions had been ignored. ...
-1
votes
1
answer
46
views
Significance of the phase of the condensate as compared to that of the regular Fermi sea in the Anderson-Higgs mechanism
I do not fully understand how the phase of the charged Cooper pair condensate is different from the phase of e.g. the Fermi liquid in a regular metal.
The state of the metal (any quantum state really) ...
- 21
-1
votes
1
answer
81
views
How much liquid nitrogen is required for Maglev trains?
I understand magnets require cooling to achieve supermagnetivity. How much of liquid nitrogen do Maglevs carry with them? How much is required to keep them cool? What is liquid nitrogen consumption ...
- 1
-1
votes
1
answer
343
views
Is Meissner effect really caused by expulsion of magnetic flux?
The Meissner effect is the expulsion of a magnetic field from a superconductor during its transition to the superconducting state.
This is the explanation by mainstream physics.
But the experiments ...
- 345
-1
votes
1
answer
150
views
Finding energy density current for free particles
I'm trying to find the energy current operator for a topological superconductor, using the continuity equation $\frac{d\mathcal{H}(x)}{dt} = -\partial_x J_E(x)$. First, however, I would like to get ...
- 11
-2
votes
1
answer
70
views
Destroying energy [closed]
The experiment is simple You make a capacitor using superconducting plates. You charge said capacitor. You then discharger capacitor through another superconductor. It would seem that you have ...
-2
votes
1
answer
84
views
What would be the nature of the plot of electrical conductivity of a metal with absolute temperature? [closed]
What should precisely be the equation of the curve of electrical conductivity of a metal and absolute temperature?
Will the conductivity approach infinity at zero kelvin?
-3
votes
1
answer
128
views
Why aren't more physicists trying to reproduce a surprising experiment about the relation between QM and gravitomagnetism?
In this article an experiment is described which shows an unusual behavior of gravitomagnetism around an accelerated spinning, superconducting ring. The gravitomagnetic field was many orders higher ...
-4
votes
1
answer
46
views
What material is superconductor at 394 K and 2 Mega Pascals? [closed]
What material is superconductor (high current) at 394 K and 2 Mega Pascals?
-5
votes
2
answers
253
views
Violation of Lorentz Invariance
Are there any physical systems that violate Lorentz invariance?
When I asked this question from an AI bot I got the following reply:
"Yes, there are physical systems in which Lorentz invariance ...
- 392
-5
votes
1
answer
136
views
Is superconductance restricted to an extremely low temperature? Or can it be effectively replicated using some other technique? [closed]
A type of electrical amplifier is proposed in which only magnetism and it’s analogous current exists for the most part. There is no voltage and no wattage (to speak of) in which electricity has to ...
- 1