Expressing the Minkowski Field Tensor for Circular Currents

In summary, Pete explains that the Minkowski field tensor is the flat space-time metric, and that if you introduce charge, the space-time will become curved.
  • #1
Norman Albers
21
0
How do we express the Minkowski field tensor for circular currents?
 
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  • #2
Albers, though you're now banned, I'll take this opportunity to explain to you why your question doesn't even make sense.

The Minkowski 'field tensor' (which in itself of dubious terminology) is the flat space-time metric. While you can pick various coordinates to express this in, such as the diag(-1,1,1,1) cartesian form or the spherical form (or infinitely many others), they are all the same thing, flat space-time.

If you then introduce charge carrying objects (and thus some notion of energy) to the system, the space-time will become curved in some way. As such, the space-time metric will no longer be Minkowski but something else. Now if someone were wondering what the space-time metric was, they'd ask "What is the space-time metric for such a system?", or to more closely resemble your question, "What is the Lorentzian space-time metric?" Minkowski is, by it's very name, flat and empty (if you're working in GR).Anything in the space-time will disturb this.

This is why your question isn't particularly well phrased and as pointed out to you in a previous thread, it's somewhat of a sign you are attempting to jump in head first to a subject you know little about. As I told you many weeks ago, it's no skin off my nose if you don't bother to learn any kind of relativity or applied differential geometry, but it would VASTLY aid your understanding and abilities in doing whatever it is you're attempting to do if you did learn some.

Besides, if you're so confident about your amazing ability in relativity, why can't you solve the Einstein Field Equations for a circular current of some kind in the energy-momentum tensor? Or are you not sure how to write a metric in cylindrical coordinates ;)
 
  • #3
AlphaNumeric said:
Albers, though you're now banned, I'll take this opportunity to explain to you why your question doesn't even make sense.
Why? Wouldn't it be better just to ignore him rather than give him the feeling that he'll get a response from someone whenever he posts non-sensical questions?

Pete
 
  • #4
I'm a hopeless care for hoping he'll see the light and realize he'd advance so much faster if he actually opened a book and learned rather than trying to reinvent the wheel.
 
  • #5
don quixote, the patron saint of teachers.
 

1. How is the Minkowski field tensor expressed for circular currents?

The Minkowski field tensor, also known as the electromagnetic stress-energy tensor, can be expressed for circular currents using the following equation: Tμν = μ0i(FμiFνi - 1/4ημνFαβFαβ), where μ0 is the permeability of free space, ημν is the Minkowski metric, and Fμν is the electromagnetic field tensor.

2. What is the significance of expressing the Minkowski field tensor for circular currents?

Expressing the Minkowski field tensor for circular currents allows us to understand the distribution of electromagnetic energy and momentum in a circular current system. It also helps in the analysis and calculation of electromagnetic fields in various applications, such as in electromagnetism and general relativity.

3. Can the Minkowski field tensor be expressed for non-circular currents?

Yes, the Minkowski field tensor can be expressed for non-circular currents as well. The equation used to express it remains the same, but the values and components may differ depending on the shape and geometry of the current system.

4. What are the applications of the Minkowski field tensor for circular currents?

The Minkowski field tensor for circular currents has various applications in the fields of physics and engineering. It is used in the analysis of electromagnetic radiation, in calculating the energy-momentum density of electromagnetic fields, and in understanding the dynamics of charged particles in circular motion.

5. Are there any limitations to using the Minkowski field tensor for circular currents?

While the Minkowski field tensor is a useful tool for analyzing circular current systems, it does have its limitations. It cannot be used for systems with time-varying fields or in situations where general relativity effects are significant. In such cases, more complex equations and models may be required to accurately describe the system.

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