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Figure 5 | EPJ Quantum Technology

Figure 5

From: Hybrid optimization schemes for quantum control

Figure 5

Convergence of optimization towards a geometric phase gate. Value of the final-time optimization functional \(J_{T}^{\mathrm {geo}}\), respectively \(J_{T}^{\mathrm {sm}}\), over the number of iterations using Krotov’s method. Each iteration requires two full propagations; the number of propagations are proportional to the required CPU time. The direct optimization starts from an arbitrary guess pulse, see Section 3.2 for details. In the pre-optimized case, the guess pulse was the result of a simplex optimization, see Section 4.2 for details.

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