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Jan
29
comment Why does choosing a time break covariance?
Some simple example would be greatly appreciated, I think that would trigger my understanding. Thank you for your answer by the way.
Jan
29
comment Why does choosing a time break covariance?
That is exactly my question, in which point of defining canonical momentum or legendre transforming the lagrangian do you fix a time? Couldn't you just define the momentum to be $\partial\mathcal L/\partial\dot\phi$, with the dot representing any parametrization of time in minkowsky space?
Jan
24
revised Electric dipolar moment of a half wave antenna
deleted 26 characters in body
Jan
24
comment Electric dipolar moment of a half wave antenna
@Georg never mind, the name is irrelevant. It's a wire with that current.
Jan
24
asked Why does choosing a time break covariance?
Jan
24
comment Electric dipolar moment of a half wave antenna
@Georg Sorry, half wave
Jan
24
revised Electric dipolar moment of a half wave antenna
added 17 characters in body
Jan
24
asked Electric dipolar moment of a half wave antenna
Jan
22
asked Charge movement in a rotating EM field (relativistic)
Jan
8
awarded  Yearling
Dec
17
revised Constant quantity associated to symmetry
added 233 characters in body
Dec
9
comment Constant quantity associated to symmetry
@bechira I am uncomfortable with stating that as some kind of theorem. I'd expect some kind of relevant content, plus I know how Noether conserved charges come out from symmetries, and I was expecting to see a connection.
Dec
9
asked Constant quantity associated to symmetry
Sep
29
awarded  Popular Question
Jul
24
awarded  Popular Question
Jul
2
awarded  Curious
Jun
18
awarded  Popular Question
May
17
awarded  Autobiographer
Apr
23
revised Mirror symmetry in spin
added 460 characters in body
Apr
23
revised Mirror symmetry in spin
edited body