# American Institute of Mathematical Sciences

October  2011, 29(4): 1443-1461. doi: 10.3934/dcds.2011.29.1443

## Asymptotic analysis of a diffuse interface relaxation to a nonlocal optimal partition problem

 1 Department of Mathematics, Pennsylvania State University, University Park, PA 16802 2 Department of Mathematics, Pennsylvania Sate University, University Park, PA 16802, United States

Received  November 2009 Revised  July 2010 Published  December 2010

We present some asymptotic analysis of a diffuse interface relaxation to a nonlocal optimal domain partition problem and the associated nonlocal interfacial motion when the interfacial width is approaching to zero. Motivated by careful numerical calculations, we first discuss several assumptions on the steady state solutions of the coupled system of differential equations which are supported by numerical results. These assumptions allow us to construct a suitable ansatz to the solutions which not only captures the leading order behavior but also provides sufficient estimates on the next order behavior so that more accurate estimates can be shown for interesting physical quantities such as energies and eigenvalues. When adopted to the gradient flow system, the ansatz gives an estimate of the asymptotic convergence rate in time to the equilibrium partitions.
Citation: Qiang Du, Jingyan Zhang. Asymptotic analysis of a diffuse interface relaxation to a nonlocal optimal partition problem. Discrete & Continuous Dynamical Systems - A, 2011, 29 (4) : 1443-1461. doi: 10.3934/dcds.2011.29.1443
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##### References:
 [1] W. Bao, Ground states and dynamics of multi-component Bose-Einstein condensates,, SIAM Multiscale Model. Simulat., 2 (2004), 210.  doi: 10.1137/030600209.  Google Scholar [2] W. Bao and Q. Du, Comuputing the ground state solution of Bose-Einstein condensates by a normalized gradient flow,, SIAM J. Sci. Comput., 25 (2004), 1674.  doi: 10.1137/S1064827503422956.  Google Scholar [3] H. Berestycki, T. C. Lin, J. Wei and C. Zhao, On phase-separation model: Asymptotics and qualitative properties,, preprint, (2010).   Google Scholar [4] V. Bonnaillie-Noel, B. Helffer and G. Vial, Numerical simulations for nodal domains and spectral minimal partitions,, ESAIM: COCV, 16 (2010), 221.  doi: 10.1051/cocv:2008074.  Google Scholar [5] L. A. Cafferelli and F. H. Lin, An optimal partition problem for eigenvalues,, Journal of Scientific Computing, 31 (2007), 5.  doi: 10.1007/s10915-006-9114-8.  Google Scholar [6] L. A. Cafferelli and F. H. Lin, Singularly perturbed elliptic systems and multi-valued harmonic functions with free boundaries,, J. Amer. Math. Soc., 21 (2008), 847.  doi: 10.1090/S0894-0347-08-00593-6.  Google Scholar [7] L. A. Cafferrelli and F. H. Lin, Nonlocal heat flows preserving the $L^2$ energy,, Discrete and Continuous Dynamical Systems A, 23 (2009), 49.   Google Scholar [8] S.-M. Chang, C.-S. Lin, T.-C. Lin and W.-W. Lin, Segregated nodal domains of two dimensional multispecies Bose-Einstein condensates,, Phys. D, 196 (2004), 341.  doi: 10.1016/j.physd.2004.06.002.  Google Scholar [9] S.-M. Chang, W.-W. Lin and S.-F. Shieh, Gauss-Seidel-type methods for energy states of a multi-component Bose-Einstein condensate,, J. of Computational Physics, 202 (2005), 367.  doi: 10.1016/j.jcp.2004.07.012.  Google Scholar [10] M. Conti, S. Terracini and G. Verzini, Nehari's problem and competing species systems,, Ann. Inst. H. Poincaré Anal. Non Linéaire, 19 (2002), 871.  doi: 10.1016/S0294-1449(02)00104-X.  Google Scholar [11] M. Conti, S. Terracini and G. Verzini, A variational problem for the spatial segregation of reaction-diffusion systems,, Indiana Univ. Math. J., 54 (2005), 779.  doi: 10.1512/iumj.2005.54.2506.  Google Scholar [12] M. Conti, S. Terracini and G. Verzini, Asymptotic estimates for the spatial segregation of competitive systems,, Adv. Math., 195 (2005), 524.  doi: 10.1016/j.aim.2004.08.006.  Google Scholar [13] Q. Du and F.-H. Lin, Numerical approximations of a norm preserving nonlinear gradient flow and applications to an optimal partition problem,, Nonlinearity, 22 (2009), 67.  doi: 10.1088/0951-7715/22/1/005.  Google Scholar [14] T.-C. Lin and J. Wei, Ground state of n coupled nonlinear schrodinger equations in $R^n$, $n\leq 3$,, Comm. Math. Phys., 255 (2005), 629.  doi: 10.1007/s00220-005-1313-x.  Google Scholar [15] J. Wei and T. Weth, Asymptotic behaviour of solutions of planar elliptic systems with strong competition,, Nonlinearity, 21 (2008), 305.  doi: 10.1088/0951-7715/21/2/006.  Google Scholar
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