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词汇 Source field
分类 英语词汇 英语翻译词典
释义

Source field

英语百科

Source field

In theoretical physics, a source field is a field J whose multiple

appears in the action, multiplied by the original field \Phi. Consequently, the source field appears on the right-hand side of the equations of motion (usually second-order partial differential equations) for \Phi. When the field \Phi 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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