Abstract
I review the role of entropy in the Second Law of Thermodynamics in providing time with a direction and explaining irreversibility. I then list seven seemingly different features, each characterizing an additional “arrow.” In one case, connected to Black Hole Physics, the arrow has been successfully merged with the thermodynamical and may serve as model; in another case, that of the Evolutionary drive, the adequate function has been identified as complexity. We define the aims of the program and also provide information for an alternative, “geometrical” (effective) approach.
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Ne'eman, Y. The Direction of Time: Seven Arrows for One Stream? A Program. International Journal of Theoretical Physics 42, 2557–2562 (2003). https://doi.org/10.1023/B:IJTP.0000005975.01284.09
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DOI: https://doi.org/10.1023/B:IJTP.0000005975.01284.09