30 lines
685 B
Julia
30 lines
685 B
Julia
using Arpack, SparseArrays
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include("ho_basis.jl")
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E_max = 30
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μω_gen = 0.2
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Λ = 0
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m = 1.0
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Va = -2
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Ra = 2
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μ1 = m * 1/2
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println("No of threads = ", Threads.nthreads())
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Es, n1s, l1s = get_sp_basis(E_max)
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println("Basis size = ", length(Es))
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println("Constructing KE matrices")
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@time "T1" T1 = sp_T_matrix(n1s, l1s; μω_gen=μω_gen, μ=μ1)
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println("Constructing PE matrices")
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V1_elem(l, n1, n2) = Va * V_Gaussian(Ra, l, n1, n2; μω_gen=μω_gen)
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@time "V1" V1 = sp_V_matrix(V1_elem, n1s, l1s)
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println("Calculating spectrum")
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@time "H" H = T1 + V1
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@time "Eigenvalues" evals, _ = eigs(H, nev=3, ncv=30, which=:SR, maxiter=5000, tol=1e-5, ritzvec=false, check=1)
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display(evals) |