dorsal/arxiv
View SchemaQuantum cloning in spin networks
| Authors | G. De Chiara, R. Fazio, C. Macchiavello, S. Montangero, G. M. Palma |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402071 |
| URL | https://arxiv.org/abs/quant-ph/0402071 |
| DOI | 10.1103/PhysRevA.70.062308 |
| Journal | Phys. Rev. A 70, 062308 (2004) |
Abstract
We introduce an approach to quantum cloning based on spin networks and we demonstrate that phase covariant cloning can be realized using no external control but only with a proper design of the Hamiltonian of the system. In the 1 -> 2 cloning we find that the XY model saturates the value for the fidelity of the optimal cloner and gives values comparable to it in the genera N -> M case. We finally discuss the effect of external noise. Our protocol is much more robust to decoherence than a conventional procedure based on quantum gates.
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"abstract": "We introduce an approach to quantum cloning based on spin networks and we\ndemonstrate that phase covariant cloning can be realized using no external\ncontrol but only with a proper design of the Hamiltonian of the system. In the\n1 -\u003e 2 cloning we find that the XY model saturates the value for the fidelity\nof the optimal cloner and gives values comparable to it in the genera N -\u003e M\ncase. We finally discuss the effect of external noise. Our protocol is much\nmore robust to decoherence than a conventional procedure based on quantum\ngates.",
"arxiv_id": "quant-ph/0402071",
"authors": [
"G. De Chiara",
"R. Fazio",
"C. Macchiavello",
"S. Montangero",
"G. M. Palma"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevA.70.062308",
"journal_ref": "Phys. Rev. A 70, 062308 (2004)",
"title": "Quantum cloning in spin networks",
"url": "https://arxiv.org/abs/quant-ph/0402071"
},
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