超流体和超导体有什么共同的物理本质？
What physical essence do superfluids and superconductors share?
它们都来自“大量粒子凝聚到同一个量子态”：超流体是氦原子集体进入同一态、没有黏性；超导体是电子成对进入同一态、没有电阻。宏观尺度上能看到量子行为，是它们最像的地方。
Both arise from many particles condensing into one quantum state: superfluid helium atoms share a state with zero viscosity, superconducting electron pairs share one with zero resistance. Macroscopic quantum behavior is their common heart.
来源 · Source
Landau,《Theory of the Superfluidity of Helium II》,Physical Review,1941 (DOI: 10.1103/physrev.60.356)
L. D. Landau, 'Theory of the Superfluidity of Helium II', Physical Review, 1941, DOI: 10.1103/physrev.60.356
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1103/physrev.60.356