dorsal/arxiv
View SchemaSuperbroadcasting of conjugate quantum variables
| Authors | Giacomo M. D'Ariano, Paolo Perinotti, Massimiliano F. Sacchi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0602037 |
| URL | https://arxiv.org/abs/quant-ph/0602037 |
| DOI | 10.1209/epl/i2006-10105-x |
| Journal | Europhys. Lett. 75, 195 (2006) |
Abstract
We consider the problem of broadcasting arbitrary states of radiation modes from N to M>N copies by a map that preserves the average value of the field and optimally reduces the total noise in conjugate variables. For N>=2 the broadcasting can be achieved perfectly, and for sufficiently noisy input states one can even purify the state while broadcasting--the so-called superbroadcasting. For purification (i.e. M<=N), the reduction of noise is independent of M. Similar results are proved for broadcasting with phase-conjugation. All the optimal maps can be implemented by linear optics and linear amplification.
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"abstract": "We consider the problem of broadcasting arbitrary states of radiation modes\nfrom N to M\u003eN copies by a map that preserves the average value of the field and\noptimally reduces the total noise in conjugate variables. For N\u003e=2 the\nbroadcasting can be achieved perfectly, and for sufficiently noisy input states\none can even purify the state while broadcasting--the so-called\nsuperbroadcasting. For purification (i.e. M\u003c=N), the reduction of noise is\nindependent of M. Similar results are proved for broadcasting with\nphase-conjugation. All the optimal maps can be implemented by linear optics and\nlinear amplification.",
"arxiv_id": "quant-ph/0602037",
"authors": [
"Giacomo M. D\u0027Ariano",
"Paolo Perinotti",
"Massimiliano F. Sacchi"
],
"categories": [
"quant-ph"
],
"doi": "10.1209/epl/i2006-10105-x",
"journal_ref": "Europhys. Lett. 75, 195 (2006)",
"title": "Superbroadcasting of conjugate quantum variables",
"url": "https://arxiv.org/abs/quant-ph/0602037"
},
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