Matter can embody the most information when it is converted to energetic, massless particles, such as neutrinos or photons, whose entropy density is proportional to the cube of their temperature.

• 物质在转换成活跃的无质量粒子（例如微中子或光子这类粒子）时，可包含最多的资讯；其熵的密度与其温度的立方成正比。