diff --git a/3b_bound.jl b/3b_bound.jl
new file mode 100644
index 0000000..8e40647
--- /dev/null
+++ b/3b_bound.jl
@@ -0,0 +1,19 @@
+include("Hamiltonian.jl")
+mode = cpu_tensor
+T = Float32
+
+V_gauss(r2) = -2 * exp(-r2 / 4)
+
+d = 3
+n = 3
+N = 20
+L = 15
+n_imag = 1
+ϕ = 0
+
+s = system{T}(d, n, N, L)
+H = Hamiltonian{T}(s, V_gauss, ϕ, n_imag, mode)
+@time evals, _, info = eig(H, 5)
+
+print(info.numops, " operations")
+display(evals)