meta user
network profile
| bio | website | motls.blogspot.com |
|---|---|---|
| location | Czech Republic | |
| age | 39 | |
| visits | member for | 2 years, 4 months |
| seen | 6 hours ago | |
| stats | profile views | 24,148 |
Hi, I am a string theorist and a publicist.
|
Feb 16 |
answered | Are neutrinos Majorana particles? |
|
Feb 16 |
answered | de sitter cosmologic limit |
|
Feb 16 |
answered | Black Hole Singularity and String Theory |
|
Feb 16 |
revised |
Covariant Quantisation and the Time Operator in String Theory added 156 characters in body |
|
Feb 16 |
revised |
Covariant Quantisation and the Time Operator in String Theory added 192 characters in body |
|
Feb 16 |
answered | Covariant Quantisation and the Time Operator in String Theory |
|
Feb 16 |
answered | Why doesn't the existence of proper-time $\tau$ imply a preferred reference frame? |
|
Feb 16 |
revised |
Energy levels in disordered organic semiconductors? added 133 characters in body |
|
Feb 16 |
revised |
Energy levels in disordered organic semiconductors? added 320 characters in body; added 97 characters in body |
|
Feb 16 |
comment |
Resistance between two points on a conducting surface Moreover, the logarithm could also be a constant, and one or both answers could also be strictly infinite because of the singular point endpoints (requiring an infinite current density around it). |
|
Feb 16 |
comment |
Resistance between two points on a conducting surface Dear @genneth, just to be sure, I am not too sure about my scalings, either. The dimensional analysis depends on figuring out which place is the most characteristic one to get the right conductance or resistance. The vicinity of the two endpoints themselves seem to be giving the biggest resistance - a lot of current per a very small area - while the space in between where there's enough room seem to dominate the conductance. Now, who wins? ;-) I would prefer to follow or do the full calculation. Is someone doing it in the answers? |
|
Feb 16 |
revised |
Time evolution in quantum mechanics edited body |
|
Feb 16 |
revised |
What restricts the value of weak hypercharge from being 5/3? added 164 characters in body |
|
Feb 16 |
comment |
Number of dimensions in string theory and possible link with number theory Dear @arivero, most things that you write down are numerology, but this particular thing is just an innocent identity, and it's conceivable that it's important in an important construction, although it's probably not as important as the very similar identity involving the number 70. In this case, one would deal with a highly indefinite, mixed-signature space... |
|
Feb 16 |
revised |
What restricts the value of weak hypercharge from being 5/3? added 343 characters in body; added 73 characters in body |
|
Feb 16 |
answered | What restricts the value of weak hypercharge from being 5/3? |
|
Feb 16 |
answered | Why String theory introduced in cosmological models to study nature of universe? |
|
Feb 16 |
answered | Energy levels in disordered organic semiconductors? |
|
Feb 16 |
comment |
Time evolution in quantum mechanics Yes, we can. However, even though this solution may look very explicit, it may be hard to evaluate - exponentials of operators on an infinite-dimensional space - in the interesting examples, so we often have to use different methods than the "most straightforward" evaluation, anyway. I have added the $i/\hbar$ factor before the commutator. |
|
Feb 16 |
revised |
Time evolution in quantum mechanics added 59 characters in body |
