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arXiv quant-ph/0609046quant-ph
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谐振子混合态的超广播

Superbroadcasting of harmonic oscillators mixed states

G. M. D'Ariano, P. Perinotti, M. F. Sacchi

摘要:

我们考虑的问题,广播量子信息编码的位移参数的谐振子,从N到M>N个副本的热态。我们展示了Weyl-Heisenberg协变广播映射,最佳地减少了热光子数,我们证明了它最大限度地减少了一般输入状态输出的共轭求积噪声。我们发现,从两个输入副本广播是可行的,同时净化(超级广播)的可能性。

英文摘要:

We consider the problem of broadcasting quantum information encoded in the displacement parameter for an harmonic oscillator, from N to M>N copies of a thermal state. We show the Weyl-Heisenberg covariant broadcasting map that optimally reduces the thermal photon number, and we prove that it minimizes the noise in conjugate quadratures at the output for general input states. We find that from two input copies broadcasting is feasible, with the possibility of simultaneous purification (superbroadcasting).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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