dorsal/arxiv
View SchemaPhase-Conjugated Inputs Quantum Cloning Machines
| Authors | N. J. Cerf, S. Iblisdir |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0102077 |
| URL | https://arxiv.org/abs/quant-ph/0102077 |
| DOI | 10.1103/PhysRevLett.87.247903 |
| Journal | Phys. Rev. Lett. 87, 247903 (2001) |
Abstract
A quantum cloning machine is introduced that yields $M$ identical optimal clones from $N$ replicas of a coherent state and $N'$ replicas of its phase conjugate. It also optimally produces $M'=M+N'-N$ phase-conjugated clones at no cost. For well chosen input asymmetries $N'/(N+N')$, this machine is shown to provide better cloning fidelities than the standard $(N+N') \to M$ cloner. The special cases of the optimal balanced cloner ($N=N'$) and the optimal measurement ($M=\infty$) are investigated.
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"abstract": "A quantum cloning machine is introduced that yields $M$ identical optimal\nclones from $N$ replicas of a coherent state and $N\u0027$ replicas of its phase\nconjugate. It also optimally produces $M\u0027=M+N\u0027-N$ phase-conjugated clones at no\ncost. For well chosen input asymmetries $N\u0027/(N+N\u0027)$, this machine is shown to\nprovide better cloning fidelities than the standard $(N+N\u0027) \\to M$ cloner. The\nspecial cases of the optimal balanced cloner ($N=N\u0027$) and the optimal\nmeasurement ($M=\\infty$) are investigated.",
"arxiv_id": "quant-ph/0102077",
"authors": [
"N. J. Cerf",
"S. Iblisdir"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.87.247903",
"journal_ref": "Phys. Rev. Lett. 87, 247903 (2001)",
"title": "Phase-Conjugated Inputs Quantum Cloning Machines",
"url": "https://arxiv.org/abs/quant-ph/0102077"
},
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