Universal Optimal Cloning of Arbitrary Quantum States : From Qubits to Quantum Registers

@inproceedings{Buek1998UniversalOC,
  title={Universal Optimal Cloning of Arbitrary Quantum States : From Qubits to Quantum Registers},
  author={Vladimı́r Bu{\vz}ek and Mark Hillery},
  year={1998}
}
We present the universal cloning transformation of states in arbitrary-dimensional Hilbert spaces. This unitary transformation attains the optimal fidelity of cloning as specified by Werner [Phys. Rev. A 58, 1827 (1998)]. With this cloning transformation, pure as well as impure states can be optimally copied, and the quality of the copies does not depend on the state being copied. We discuss the properties of quantum clones. In particular, we show that in the limit of high dimension the… CONTINUE READING

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