53 lines
1.5 KiB
Julia
53 lines
1.5 KiB
Julia
using Plots
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include("3body_resonance.jl")
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current_E = 5.9673 - 0.0006im
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training_c = 2.0 : -0.2 : 1.2
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extrapolating_c = 1.05 .- [0.0 : 0.1 : 0.4; 0.45 : 0.05 : 0.60]
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@time "H0" H0 = T1 + T2
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@time "V" V = V1 + V2
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# free memory
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Es = n1s = l1s = n2s = l2s = mask1 = mask2 = T1 = T2 = V1_cache = V_relative_cache = V1 = V_relative = U = V2 = nothing
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GC.gc()
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exact = ComplexF64[]
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training = ComplexF64[]
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extrapolated = ComplexF64[]
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training_vecs = Vector{ComplexF64}[]
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for c in training_c
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println("Training for c = $c")
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H = H0 + c .* V
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evals, evecs = eigs(H, nev=3, ncv=24, which=:LI, maxiter=5000, tol=1e-5, ritzvec=true, check=1)
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global current_E = nearest(evals, current_E)
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push!(training, current_E)
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push!(training_vecs, evecs[:, nearestIndex(evals, current_E)])
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end
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EC_basis = hcat(training_vecs...)
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N_EC = transpose(EC_basis) * EC_basis
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H0_EC = transpose(EC_basis) * H0 * EC_basis
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V_EC = transpose(EC_basis) * V * EC_basis
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for c in extrapolating_c
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println("Extrapolating for c = $c")
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H = H0 + c .* V
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evals, evecs = eigs(H, nev=3, ncv=24, which=:LI, maxiter=5000, tol=1e-5, ritzvec=true, check=1)
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global current_E = nearest(evals, current_E)
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push!(exact, current_E)
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# extrapolation
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H_EC = H0_EC + c .* V_EC
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evals = eigvals(H_EC, N_EC)
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push!(extrapolated, nearest(evals, current_E))
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end
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scatter(real.(training),imag.(training), label="training")
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scatter!(real.(exact),imag.(exact), label="exact")
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scatter!(real.(extrapolated),imag.(extrapolated), label="extrapolated")
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savefig("temp/NCSM.pdf") |