AI 中文总结
介绍CosmoLattice 2.0重大升级，拓宽物理范围与计算能力，引入新场的晶格实现及生成初始条件程序，纳入多种新特性如积分器等，支持GPU加速并提供详细文档。
AI 中文摘要
本文介绍了CosmoLattice v2.0，这是一次重大升级，极大地拓宽了代码的物理范围和计算能力。它引入了通过\(\phi^2R\)与引力非最小耦合的标量场以及与阿贝尔规范场耦合的类轴子场\(\phi F_{\mu\nu}\widetilde F^{\mu\nu}\)的晶格实现。还提供了生成特殊初始条件的新程序，包括宇宙缺陷的缩放网络等。该版本纳入了非辛系统的低存储龙格 - 库塔积分器等，有标量场模拟等新特性，支持GPU加速，且提供了代码使用的详细文档。
英文摘要
This paper introduces $\tt {\mathcal C}osmo{\mathcal L}attice$ $\tt v2.0$, a major upgrade that substantially broadens the physical scope and computational capabilities of the code. It introduces lattice implementations of scalar fields non-minimally coupled to gravity through $ϕ^2R$, as well as axion-like fields coupled to Abelian gauge sectors as $ϕF_{μν}\widetilde F^{μν}$. It also provides new procedures for generating specialized initial conditions, including scaling networks of cosmic defects ($\it e.g.$ strings and domain walls), and fields with arbitrary power spectra. The release also incorporates low-storage Runge-Kutta integrators for non-symplectic systems (suitable $\it e.g.$ for non-minimal scalar kinetic terms as $\mathcal{G}_{ab}\partial_μϕ^a\partial^μϕ^b$), scalar-field simulations on reduced $(1+1)$- and $(2+1)$-dimensional lattices, new optimized gravitational-wave evolution, more flexible field and energy-density outputs, and GPU support that can accelerate simulations by a factor $\mathcal{O}(10)$ relative to CPU execution. Extensive documentation on the use of the code is provided on https://www.cosmolattice.com
Comments20 pages + references, 1 figure. v2: minor changes, references added
