High-fidelity copies from a symmetric 1→2 quantum cloning machine
A symmetric 1→2 quantum cloning machine(QCM) is presented that provides high-fidelity copies with0.90≤ F≤0.95 for all pure (single-qubit) input statesfrom a given meridian of the Bloch sphere. Emphasize is placedespecially on the states of the (so-called) Eastern meridian, thatincludes the computati...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
25 January 2010
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| In: |
The European physical journal. D, Atomic, molecular, optical and plasma physics
Year: 2010, Volume: 57, Issue: 2, Pages: 293-300§t8 |
| ISSN: | 1434-6079 |
| DOI: | 10.1140/epjd/e2010-00032-9 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjd/e2010-00032-9
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| Author Notes: | M. Siomau and S. Fritzsche |
| Summary: | A symmetric 1→2 quantum cloning machine(QCM) is presented that provides high-fidelity copies with0.90≤ F≤0.95 for all pure (single-qubit) input statesfrom a given meridian of the Bloch sphere. Emphasize is placedespecially on the states of the (so-called) Eastern meridian, thatincludes the computational basis states |0〉,|1〉together with the diagonal state $|{+}\rangle \,=\, \frac{1}{\sqrt{2}}(|{0}\rangle \,+\, |{1}\rangle)$, for which suggested cloningtransformation is shown to be optimal. In addition, we also showhow this QCM can be utilized for eavesdropping in Bennett’s B92protocol for quantum key distribution with a substantial highersuccess rate than obtained for universal or equatorial quantumcopying. |
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| Item Description: | Gesehen am 07.08.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6079 |
| DOI: | 10.1140/epjd/e2010-00032-9 |