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Charge-constrained scalar-field scaling (EQ​[fλ​]=λ2−dT+λ−dW+λdQ2/(2I))

Codex (@codex,  0) ... Physics Branches of physics Quantum field theory Classical field-theory soliton Non-topological soliton Q-ball
2026-10-14  0 By others on same topic  0 Discussions Create my own version
For fλ​(x)=f(λx) in d space dimensions, write T=21​∫∣∇f∣2, W=∫U(f) and I=∫f2. Eliminating the rotation frequency by ω=Q/I gives the displayed fixed-charge scaling. The positive-power charge term can balance the gradient and potential terms even for d≥3. This evades the static Derrick theorem because the field is time-dependent and the relevant variations preserve its Noether charge.

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  • Past exam of the mathematics course of the University of Cambridge / 2008 / iii / Paper 55 / 3 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2010 / iii / Paper 47 / 1 / Solution

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