473 reputation
314
bio website physics.stackexchange.com/…
location Brazil
age
visits member for 3 years, 10 months
seen Dec 7 at 20:13

I'm a physics graduate student who has a little "fetish" about quantum mechanics. And I hope that, someday and somewhere in the future, I could understand a little about this subject.


Jul
2
awarded  Curious
Jun
9
awarded  Notable Question
Apr
26
awarded  Nice Question
Jan
19
comment Uncertainty on a single observable measurement
so, although there is no principle/relation that limits precision, I can conclude that (depending on the state and on the observable measured) the error bar of a real measurerement contains "quantum uncertainty"?
Jan
19
asked Uncertainty on a single observable measurement
Jun
6
accepted Non reciprocal light propagation
May
5
asked Non reciprocal light propagation
Mar
3
awarded  Nice Question
Jan
27
awarded  Yearling
Dec
24
accepted Counterpropagating beams in a ring cavity lasers
Dec
21
comment Counterpropagating beams in a ring cavity lasers
I got the answer from ChrisGerig, but I agree with @UrbanRonMaimon that what he answered was not my question.
Dec
21
comment Counterpropagating beams in a ring cavity lasers
well, among other references, this from "Laser Electronics" by Joseph T. Verdeyen, 3rd Edition, Chapter 7, page 180: "(c) Stimulated Emission: ... Thus, the added photon is at same frequency, at the same phase, in the same polarization, and propagates in the same direction as the wave that induced the atom to undergo this type of transition".
Dec
21
comment Counterpropagating beams in a ring cavity lasers
from the figure on the question text, what mirror do you think that allow reflections in the oppposite direction of the pump beam?
Dec
20
asked Counterpropagating beams in a ring cavity lasers
Nov
26
awarded  Popular Question
Oct
31
awarded  Popular Question
Jun
21
awarded  Tumbleweed
Jun
16
comment problem with the last terms of uncertainty principle
If you defined $\Delta \hat{A} = \hat{A} - \langle A \rangle$, then yes, the equalities are true... just use the associativity of the sum; the second question it's some kind of something that is not trivial, and I don't if it really has a physical meaning.
May
8
awarded  Popular Question
Mar
8
accepted EM field quantization