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Two non-orthogonal states can be cloned by a unitary-reduction process

LU-Ming Duan, Guang-Can Guo, A probabilistic cloning machine for replicating two non-orthogonal states, Phys · 1997 · quant-ph · arXiv quant-ph/9704020

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abstract

We show that, there are physical means for cloning two non-orthogonal pure states which are secretly chosen from a certain set $% \$={ | \Psi_0 > , | \Psi_1 > }$. The states are cloned through a unitary evolution together with a measurement. The cloning efficiency can not attain 100%. With some negative measurement results, the cloning fails.

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quant-ph 1

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2026 1

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UNVERDICTED 1

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No-cloning with unitary scaling

quant-ph · 2026-04-24 · unverdicted · novelty 4.0 · 2 refs

It is impossible to produce a U-copy of an arbitrary unknown quantum pure state using unitary evolution.

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  • No-cloning with unitary scaling quant-ph · 2026-04-24 · unverdicted · none · ref 3 · 2 links · internal anchor

    It is impossible to produce a U-copy of an arbitrary unknown quantum pure state using unitary evolution.