A blow‐up result for the travelling waves of the pseudo‐relativistic Hartree equation with small velocity
A blow‐up result for the travelling waves of the pseudo‐relativistic Hartree equation with small velocity
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DOI:
10.1002/mma.7416
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发表时间:
2021-04
影响因子:
2.9
通讯作者:
Qingxuan Wang
中科院分区:
文献类型:
--
作者:
Qingxuan Wang
In this paper, we consider the pseudo‐relativistic Hartree equation i∂tψ=−△+m2ψ−1|x|∗|ψ|2ψonℝ3 and study travelling solitary waves of the form ψ(t, x) = eitμφ(x − v t) , where v∈ℝ3 denotes travelling velocity. Fröhlich, Jonsson and Lenzmann in [Comm. Math. Phys. 2007, 274:1‐30] proved that for |v|<1 there exists a critical constant Nc(v), such that the travelling waves exist if and only if 0 < N < Nc(v), where N denotes particle number. In this paper, we consider v=(β,0,0) with 0 < β < 1, and let Nc(β)=Nc(v)|v=(β,0,0) . We find that Nc(β) is Lipschitz continuity with respect to β. Based on this fact, we then prove that the boosted ground states φβ with ‖φβ‖L22=(1−β)Nc(β) satisfy limβ→0+‖φβ‖H1/2→+∞ . The explicit blow‐up profile and rate will be computed.