From 0c3fb156ae615459f20c26e0ef589413f7f99d77 Mon Sep 17 00:00:00 2001
From: ysyapa <ysyapa@ncsu.edu>
Date: Sun, 9 Apr 2023 20:08:00 -0400
Subject: [PATCH] 3-body resonance calculation

---
 calculations.ipynb | 69 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 calculations.ipynb

diff --git a/calculations.ipynb b/calculations.ipynb
new file mode 100644
index 0000000..4d4fe45
--- /dev/null
+++ b/calculations.ipynb
@@ -0,0 +1,69 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# 10.1007/s00601-020-01550-8\n",
+    "# Fig. 7\n",
+    "# E_R = 4.18(8)\n",
+    "\n",
+    "#./En.run -d 3 -n 3 -N 16 -c pot=v_shifted_gauss,v0=2.0,r=1.5,a=3.0 -c n_eig=20 -c which=li -c tol=1e-6 -L 16 -c phi=0.3 -v\n",
+    "\n",
+    "include(\"Hamiltonian.jl\")\n",
+    "mode = gpu_cutensor\n",
+    "T = Float32 # single-precision mode\n",
+    "\n",
+    "using Plots\n",
+    "\n",
+    "V_gauss(r2) =\n",
+    "    2 * exp(-((sqrt(r2) - 3) / 1.5) ^ 2)\n",
+    "\n",
+    "d = 3\n",
+    "n = 3\n",
+    "N = 14\n",
+    "L::T = 16\n",
+    "μ::T = 0.5\n",
+    "n_imag = 0\n",
+    "\n",
+    "for ϕ::T in 0.2:0.05:0.4\n",
+    "    CUDA.reclaim()\n",
+    "    GC.gc(true)\n",
+    "    H = Hamiltonian{T}(V_gauss, d, n, N, L, ϕ, μ, n_imag, mode)\n",
+    "    @time evals, _, info = eig(H, 20)\n",
+    "    H = nothing\n",
+    "    CUDA.reclaim()\n",
+    "    GC.gc(true)\n",
+    "    \n",
+    "    print(info.numops, \" operations\")\n",
+    "    display(evals)\n",
+    "\n",
+    "    scatter(real.(evals), imag.(evals); legend=false)\n",
+    "    xlabel!(\"Re E\")\n",
+    "    ylabel!(\"Im E\")\n",
+    "    xlims!(0, 6)\n",
+    "    ylims!(-0.6, 0)\n",
+    "    savefig(\"temp/phi$(Int(round(ϕ * 100))).png\")\n",
+    "end"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Julia 1.8.5",
+   "language": "julia",
+   "name": "julia-1.8"
+  },
+  "language_info": {
+   "file_extension": ".jl",
+   "mimetype": "application/julia",
+   "name": "julia",
+   "version": "1.8.5"
+  },
+  "orig_nbformat": 4
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}