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arXiv 1104.3883quant-ph
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光合作用模型中的输运和纠缠

A critical view on transport and entanglement in models of photosynthesis

Markus Tiersch, Sandu Popescu, Hans J. Briegel

备注：
16 pages, 1 figure, published version; typos corrected
发表信息：
Phil. Trans. R. Soc. A 370, 3771 (2012)
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摘要：

我们批判地回顾了最近的索赔，启发量子光学和量子信息，有纠缠的生物色素蛋白质复合物，它是负责高传输效率。虽然实验证明了出乎意料的长相干时间，但纠缠的存在目前还是一个纯粹的理论猜想;我们分析的正是这个猜想。正如一个玩具模型所证明的那样，在不产生纠缠的情况下，可以获得类似的输运现象。此外，我们还认为，即使纠缠确实存在，它是纯粹的偶然性，似乎没有起到必要的作用的传输效率。我们强调，我们的论文并不是证明纠缠不存在于光捕获复合体中-这将需要对系统及其参数的了解远远超出最先进的水平。相反，我们提出了一个反例，以最近的纠缠主张，表明论点，因为他们站在目前，是没有足够的理由，因此不能作为纠缠存在的证据，更不用说它的重要作用，在激发运输。

英文摘要：

We revisit critically the recent claims, inspired by quantum optics and quantum information, that there is entanglement in the biological pigment protein complexes, and that it is responsible for the high transport efficiency. While unexpectedly long coherence times were experimentally demonstrated, the existence of entanglement is, at the moment, a purely theoretical conjecture; it is this conjecture that we analyze. As demonstrated by a toy model, a similar transport phenomenology can be obtained without generating entanglement. Furthermore, we also argue that even if entanglement does exist, it is purely incidental and seems to plays no essential role for the transport efficiency. We emphasize that our paper is not a proof that entanglement does not exist in light-harvesting complexes - this would require a knowledge of the system and its parameters well beyond the state of the art. Rather, we present a counter-example to the recent claims of entanglement, showing that the arguments, as they stand at the moment, are not sufficiently justified and hence cannot be taken as proof for the existence of entanglement, let alone of its essential role, in the excitation transport.

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