3-body resonance calculation

calculations.ipynb

@@ -0,0 +1,69 @@
+{
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+  {
+   "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"
+   ]
+  }
+ ],
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