光子气
- 网络Photon gas
光子气-
辐射热力学中光量子的熵和光子气的熵
Entropy of the photon and photon gas in thermodynamics of radiation
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主要困难在于，在通常由三维微腔所包裹的普朗克黑体组态中，光子是没有质量的并且光子气的化学势恒为零。因此，在这种环境下光子看起来不可能发生宏观凝聚。
The difficulty is that in the usual Planck blackbody configuration , which consists of an empty three-dimensional cavity , the photon is massless and its chemical potential is zero , so that the BEC of photons would seem to be impossible .