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学习笔记 || AI时代的“费米能级”?

  • 2026-01-11 17:39:04
学习笔记 || AI时代的“费米能级”?

学习笔记 || AI时代的“费米能级”?

近年来,随着AI的发展,各种名词概念层出不穷。2026年刚刚开始,就出现了一个(对我来说是)新名词概念——AI时代的“费米能级”。
这是这几天在AI圈流传的一个AI大神年终总结里提出的观点。我是第一次听说这个概念。

我现在有两个问题:
①这个AI大神是谁?为什么他提出的这个观点能引起关注?
②AI时代的“费米能级”是什么意思?

第一
这个AI大神就是Meta前AI研究员田渊栋,强化学习领域顶级华人科学家,拥有十余年AI研究经验,发表多篇顶级论文。2025年1月被Meta派去支援Llama4项目(Meta开源大模型,被中国的DeepSeek、千问等开源模型超越),后被裁;目前选择创业,担任新初创公司联合创始人。他善于以技术理性视角分析问题,善于用跨学科概念(如物理学)类比AI时代现象,兼具学术深度与人文反思。

第二
要想知道AI时代的“费米能级”,就要先知道什么是“费米能级”?

“费米能级”原本是物理学概念,是指“热力学平衡条件下电子系统的化学势,在绝对零度时是电子遵循泡利不相容原理填充的最高能级,在有限温度时是电子占据概率恰好为 50% 的能量水平,是凝聚态物理与量子统计力学中描述电子分布规律的核心参数。”

这听起来很拗口,我试着用“教室排座位”来比喻:
把材料里的电子想象成要坐座位的同学,能量低的座位在前排,能量高的在后排,而且每个座位只能坐 1 个同学。
绝对零度时(特别冷):同学们都抢着坐前排,从第一排开始挨个坐满,一直坐到某一排 —— 这一排就是费米能级。这时候,费米能级以下的座位全坐满,以上的全空着,它就是电子能坐到的最高一排座位。
常温下(咱们日常温度):有点热,前排少数同学会跑到后排空座位上。这时候费米能级就变成了 “刚好一半座位有人、一半空着” 的那一排 —— 不是绝对的最高座位,但还是判断电子分布的核心 “标尺”。

在田渊栋的年终总结里,他用这个概念类比AI时代,非常精妙——AI的能力就像一场不断上涨的洪水,人站在不同高度上。水位线以下的人被淹没,求着证明自己的价值;水位以上的人(稀缺)供不应求。这条水位线就是“费米能级”。

他在年终总结里写道:“如果把人+所有个人能获取的AI当成一个智能体,整体来看,它的能力分布会和电子能级在材料里的分布很像:低于或达到某个水准线的智能体遍地都是,求着客户给它活干,以证明自己还是有用的;而高于这个水准线的智能体则指数级地变少,获取和使用它非常花钱,还常常排不到。”
#费米能级

魔方MAN

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      北京,2026年1月11日 11:38,

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      135. /yingpanguazai/ssd/ssd1/www/no.67808.cn/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
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      139. /yingpanguazai/ssd/ssd1/www/no.67808.cn/runtime/temp/6df755f970a38e704c5414acbc6e8bcd.php ( 12.06 KB )
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      1. CONNECT:[ UseTime:0.000488s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000774s ]
      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000551s ]
      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002070s ]
      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000880s ]
      6. SELECT * FROM `set` [ RunTime:0.001471s ]
      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000717s ]
      8. SELECT * FROM `article` WHERE `id` = 459618 LIMIT 1 [ RunTime:0.000418s ]
      9. UPDATE `article` SET `lasttime` = 1768175466 WHERE `id` = 459618 [ RunTime:0.012695s ]
      10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000274s ]
      11. SELECT * FROM `article` WHERE `id` < 459618 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000820s ]
      12. SELECT * FROM `article` WHERE `id` > 459618 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004729s ]
      13. SELECT * FROM `article` WHERE `id` < 459618 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.054721s ]
      14. SELECT * FROM `article` WHERE `id` < 459618 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.051251s ]
      15. SELECT * FROM `article` WHERE `id` < 459618 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.043759s ]
      0.272315s