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arXiv · 1802.06563

Sharp bilinear estimates and its application to a system of quadratic derivative nonlinear Schr\"odinger equations

Hiroyuki Hirayama·Shinya Kinoshita
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Abstract

In the present paper, we consider the Cauchy problem of the system of quadratic derivative nonlinear Schr\"odinger equations for the spatial dimension $d=2$ and $3$. This system was introduced by M. Colin and T. Colin (2004). The first author obtained some well-posedness results in the Sobolev space $H^{s}$. But under some condition for the coefficient of Laplacian, this result is not optimal. We improve the bilinear estimate by using the nonlinear version of the classical Loomis-Whitney inequality, and prove the well-posedness in $H^s$ for $s\ge 1/2$ if $d=2$, and $s>1/2$ if $d=3$.

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Hiroyuki Hirayama, Shinya Kinoshita. 2018-02-19. Sharp bilinear estimates and its application to a system of quadratic derivative nonlinear Schr\"odinger equations. https://doi.org/10.1016/j.na.2018.07.013

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