Generating large disordered stealthy hyperuniform systems with ultra-high accuracy to determine their physical properties

Abstract

Hyperuniform many-particle systems are characterized by a structure factor $S(\mathbf{k})$ that is precisely zero as $|\mathbf{k}|\to 0$; and stealthy hyperuniform systems have $S(\mathbf{k})=0$ for the finite range $0<|\mathbf{k}|\le K$, called the "exclusion region." Through a process of collective-coordinate optimization, energy-minimizing disordered stealthy hyperuniform systems of moderate size have been made to high accuracy, and their novel physical properties have shown great promise. However, minimizing $S(\mathbf{k})$ in the exclusion region is computationally intensive as the system size becomes large. In this Letter, we present an improved methodology to generate such states using double-double precision calculations on GPUs that reduces the deviations from zero within the exclusion region by a factor of approximately $10^{30}$ for systems sizes more than an order of magnitude larger. We further show that this ultra-high accuracy is required to draw conclusions about their corresponding characteristics, such as the nature of the associated energy landscape and the presence or absence of Anderson localization, which might be masked, even when deviations are relatively small.

arXiv comment7 pages, 3 figures

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