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Composite pulses, which produce ultrabroadband, ultranarrowband and ultrapassband -, -) rotations by on the Bloch-Poincaré sphere, are presented. The first class plays a role for design of achromatic polarisation retarders, when the second class corresponds to chromatic polarisation filters. The third class is an assortment of the above two classes. Besides, composite pulses, which produce ultrabroadband -) rotations by on the same sphere, are presented. These phasal pulses coincide with achromatic polarisation rotators. On the quantum-classical analogy, we obtain ultrarobust, ultrasensitive and ultrasquare quantum control of a gate and ultrarobust quantum control of a gate.

生成讲解博客的中文版本

生成AI智能校验的中文版本