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Experimental realization of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn mathvariant="bold">1</mml:mn><mml:mo mathvariant="bold">โ</mml:mo><mml:mn mathvariant="bold">2</mml:mn></mml:mrow></mml:math>asymmetric phase-covariant quantum cloning
While exact cloning of an unknown quantum state is prohibited by the linearity of quantum mechanics, approximate cloning is possible and has been used, e.g., to derive limits on the security of quantum communication protocols. In the case of asymmetric cloning, the information from the input state is distributed asymmetrically โฆ