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Efficient spectral computation of the stationary states of rotating Bose-Einstein condensates by the preconditioned nonlinear conjugate gradient method

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Academic year: 2021

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Figure 1: Update rule with the projected gradient, with the λ term (red) and with the unprojected gradient, without the λ term (blue).
Figure 2: Example 6.1. Number of iterations to converge for different methods and different stepsizes, with different values of the discretization parameter h.
Figure 3: Example 6.2. Number of iterations of PG ν and PCG ν (ν = ∆, V, C,C 1 ,C 2 ) to converge, for different nonlinear strengths η.
Figure 4: Example 6.3. Number of iterations to converge for BE ν , PG ν and PCG ν for ν = I, V,∆, C, vs
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