Abstract
We propose a cavity QED scheme for implementing the 1 → 2 probabilistic quantum cloning (PQC) of two single-atom states. In our scheme, after the to-be-cloned atom and the assistant atom passing through the first cavity, a measurement is carried out on the assistant atom. Based on the measurement outcome we can judge whether the PQC should be continued. If the cloning fails, the other operations are omitted. This makes our scheme economical. If the PQC is continued (with the optimal probability) according to the measurement outcome, two more cavities and some unitary operations are used for achieving the PQC in a deterministic way. Our scheme is insensitive to the decays of the cavities and the atoms.
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This work is supported by the National Science Foundation of Anhui province (1508085SMA206, 1508085MF136).
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Rui, PS., Liu, DJ. Probabilistic Cloning of two Single-Atom States via Thermal Cavity. Int J Theor Phys 55, 5055–5061 (2016). https://doi.org/10.1007/s10773-016-3126-4
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DOI: https://doi.org/10.1007/s10773-016-3126-4