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seen May 31 '11 at 18:04

Aerospace Engineer


Sep
24
awarded  Autobiographer
Feb
18
comment Are virtual photons affected by effective gravity in non-linear quantum electrodynamics?
@Marek: please, forgive my engineer's practical mind. Look also at my second comment in the linked question to the right of the screen. Are you aware of experiments supporting the Cherenkov radiation argument in the answer?
Feb
17
revised Are virtual photons affected by effective gravity in non-linear quantum electrodynamics?
Added a sentence to clarify the question motivation.
Feb
16
comment Are virtual photons affected by effective gravity in non-linear quantum electrodynamics?
No, it isn't the same question since the last one about fermions relied on the assumption of a positive answer for the present one. Not having obtained a satisfactory answer to the former, I get back to the first principles. Respectfully, I am looking for smart answers rather than smart comments.
Feb
16
asked Are virtual photons affected by effective gravity in non-linear quantum electrodynamics?
Feb
10
awarded  Editor
Feb
10
revised Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
deleted 1 characters in body
Feb
10
comment Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
To my knowledge, experiments have been proposed for detecting nonlinear quantum electrodynamics effects, one of them being Cherenkov radiation produced by charged fermions travelling outside the "effective" light cone. So far no results have been reported, so either these experiments were not yet performed or they did not succeed.
Feb
10
awarded  Supporter
Feb
9
comment Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
@QGR:if virtual photons are also affected, then some unbalanced self-forces in semi-classical extended fermion models should be expected. The particles would then accelerate under the effective gravity field, too. I doń't know what would be the result in the quantum field theory context.
Feb
9
comment Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
The answer seems to be a little off-topic regarding the main question. Charged or neutral fermions can indeed travel faster than the electromagnetic waves in the presence of a background electromagnetic field, provided they are not subjected to the "effective" spacetime curvature.
Feb
9
comment Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
The term "effective gravity" stands for the spacetime curvature effects on photons in vacuum, due to the optical "effective metric" of Non-Linear Electrodynamics. The standard viewpoint is that neutral fermions are not affected by the optical metric. Rephrasing the main question, why should it be so, if as widely accepted, their mass is partially of electromagnetic origin? It seems the standard viewpoint cannot be conciliated with Einstein Equivalence Principle, since different non-charged particles "fall" with different accelerations.
Feb
8
comment Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?
Effective gravity is in addition to classical electromagnetic interaction!
Feb
8
awarded  Student
Feb
8
asked Why can't fermions be affected by effective gravity in non-linear quantum electrodynamics?