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| {{Unreferenced stub|auto=yes|date=December 2009}}
| | The writer is called Irwin Wunder but it's not the most masucline name out there. Hiring is his occupation. To do aerobics is a factor that I'm totally addicted to. Her family members lives in Minnesota.<br><br>My web page - [http://wixothek.com/user/MBuckmast std home test] |
| In [[theoretical physics]], a '''source field''' is a field <math>J</math> whose multiple
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| :<math> S_{source} = J\Phi</math> | |
| appears in the action, multiplied by the original field <math>\Phi</math>. Consequently, the source field appears on the right-hand side of the equations of motion (usually second-order [[partial differential equation]]s) for <math>\Phi</math>. When the field <math>\Phi</math> is the [[electromagnetic potential]] or the [[metric tensor]], the source field is the [[electric current]] or the [[stress-energy tensor]], respectively.
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| All [[Green's function]]s (correlators) may be formally found via [[Taylor expansion]] of the [[partition sum]] considered as a function of the source fields. This method is commonly used in the [[path integral formulation]] of [[quantum field theory]]. The general method by which such source fields can be utilized to obtain propagators in both quantum, statistical-mechanics and other systems is outlined in the article on the [[partition function (mathematics)|partition function]].
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| {{DEFAULTSORT:Source Field}}
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| [[Category:Quantum field theory]]
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| {{Phys-stub}}
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Latest revision as of 17:51, 18 November 2014
The writer is called Irwin Wunder but it's not the most masucline name out there. Hiring is his occupation. To do aerobics is a factor that I'm totally addicted to. Her family members lives in Minnesota.
My web page - std home test