A geometrical description of the universal $$1 \rightarrow 2$$ asymmetric quantum cloning region
نویسندگان
چکیده
We consider the problem of determining achievable region parameters for universal $1 \to 2$ asymmetric quantum cloning. Measuring cloning performance with figure merit singlet fraction, we show that physical is a union ellipses in plane. Equivalently, characterize parameter state compatibility two possibly different isotropic states, considering, first time, negative fractions.
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ژورنال
عنوان ژورنال: Quantum Information Processing
سال: 2021
ISSN: ['1573-1332', '1570-0755']
DOI: https://doi.org/10.1007/s11128-021-03258-y