Sharp universal rate for stable blow-up of corotational wave maps

Abstract

We consider the energy-critical (corotational) 1-equivariant wave maps into the two-sphere. By the seminal work [53] of Raphaël and Rodnianski, there is an open set of initial data whose forward-in-time development blows up in finite time with the blow-up rate $\lambda (t)=(T-t)e^{-\sqrt{|\log (T-t)|}+O(1)}$. In this paper, we show that this $e^{O(1)}$-factor in fact converges to the universal constant $2e^{-1}$, and hence these solutions contract at the universal rate $\lambda (t)=2e^{-1}(T-t)e^{-\sqrt{|\log (T-t)|}}(1+o_{t\to T}(1))$. Our proof is inspired by recent works on type-II blow-up dynamics for parabolic equations. The key improvement is in the construction of an explicit invariant subspace decomposition for the linearized operator perturbed by the scaling generator in the dispersive case, from which we obtain a more precise ODE system determining $\lambda (t)$.

66 pages

References in corpus (3)

• Scattering below critical energy for the radial 4D Yang-Mills equation and for the 2D corotational wave map system
• Soliton resolution for critical co-rotational wave maps and radial cubic wave equation
• Universality of blow up profile for small blow up solutions to the energy critical wave map equation

Cited by in corpus (1)

• Quantized slow blow-up dynamics for the energy-critical corotational wave maps problem