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第7章 【逐渐揭开的序幕】秋山空(2 / 2)

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回到家里后,秋山空随意的脱掉外套,舒服地靠倒在躺椅上,拿出平板电脑阅读文献。他订了谷歌学术的文献推送,每个星期都有数篇前沿文献被推送到他的邮箱。虽然发现了这么个天大的秘密,但他既然已经暂时决定不出手干涉,那就不会让这件事干扰到作为人类的活动。

小主,这个章节后面还有哦,请点击下一页继续阅读,后面更精彩!邮箱中一篇关于脑科学和量子力学的文献吸引了他的注意力。

“用量子力学解释人类大脑?”秋山空先看了摘要部分,摇了摇头,“目前的证据表明,我们可以用神经元之间的交互来解释人类的意识,似乎没必要牵扯到量子力学吧?”

他虽然不是学物理专业出身,基础的物理知识还是有一些的。

“基于量子效应,组成神经元支撑结构的蛋白质管——细胞微管同时处于两个不同形状的【叠加态】……不不不,叠加态和量子纠缠都是非常脆弱的现象,稍有干扰就会失去平衡【退相干】。”

“尽管澳大利亚和新西兰有物理学家制造出能够储存信息长达6小时的量子硬盘,但那是利用激光将一个量子态写入铕原子核自旋上,然后将晶体置于固定磁场和振荡磁场的组合中储存。可是在温暖潮湿的大脑里,晃荡拥挤的分子就像一锅热汤,几乎不可能维持相干状态。”

“计算表明,细胞微管叠加态只能持续10的负20次方至10的负30次方秒……”带着满肚子怀疑,秋山空继续往下读,“如果一个原子核具有最低可能的自旋值,也就是1/2,那么它与电场之间几乎没有任何相互作用,仅有一个非常小的磁场作用,在大脑这种环境下会特别抗干扰。”

“大脑里存在一种自旋1/2的原子核——磷,而磷元素是许多生化反应的积极参与者。我们认为大脑中进行的量子过程基于一种被称为波斯纳集群的磷酸钙结构。经过计算,它们的相干时间可以长达105秒。我们猜测,在大脑内制造制造核自旋之间的纠缠态和相干态的化学反应是参与钙的吸收和利用焦磷酸酶的脂肪代谢过程。”

“焦磷酸酶能打破2个相连的磷酸根离子结构,产生2个单离子,这2个离子的核自旋处于量子纠缠态。它们被释放到细胞周围的液体中,与钙离子结合形成波斯纳集群,从而使得大脑的细胞外液充斥着高纠缠态的波斯纳集群。在神经内部,这些分子可能会开始改变细胞发出信号和反应的方式,并由此形成思想与记忆。”

“我们设计了一个实验,诱发可能引起磷原子核自旋纠缠状态的化学反应,并在其中寻找量子相干……我们猜测,意识现象很有可能与相互连通的微管的量子行为有关。”

“核自旋是否是脑磁改变大脑状态的原因之一?”

通读全文后,秋山空扪心自问,这篇文献虽然带来了更多有待研究的问题,但一旦在这个方向有所突破,神经科学的基础研究将会有质的飞跃。

“有意思,作者是……茅场晶彦等,东京大学山田研究室。”

(本章完)

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