Push-pull optimization of quantum controls

Optimization of quantum controls to achieve a target process is centered around an objective function comparing the realized process with the target. We propose an objective function that incorporates not only the target operator but also a set of its orthogonal operators whose combined influence le...

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التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Priya Batra, V. R. Krithika, T. S. Mahesh
التنسيق: مقال
اللغة:English
منشور في: American Physical Society 2020-03-01
سلاسل:Physical Review Research
الوصول للمادة أونلاين:http://doi.org/10.1103/PhysRevResearch.2.013314
الوصف
الملخص:Optimization of quantum controls to achieve a target process is centered around an objective function comparing the realized process with the target. We propose an objective function that incorporates not only the target operator but also a set of its orthogonal operators whose combined influence leads to an efficient exploration of the parameter space, faster convergence, and extraction of superior solutions. The push-pull optimization, as we call it, can be adopted in various quantum control scenarios. We describe adopting it for gradient based and variational-principle based approaches. Numerical analysis of quantum registers with up to seven qubits reveals significant benefits of the push-pull optimization. We describe applying the push-pull optimization to prepare a long-lived singlet order in a two-qubit system using NMR techniques.
تدمد:2643-1564