Timeline for Can causality be violated?
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6 events
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| Jun 15, 2015 at 8:37 | comment | added | M.Herzkamp | @chharvey: Yes, entropy may increase in one direction and decrease in the other. Note, that entropy is a property of the system, like total energy or temperature. Entropy growing in one direction and decreasing in the other has nothing to do with physical laws, but with statistics. | |
| Jun 13, 2015 at 0:12 | comment | added | chharvey | You seem to contradict yourself. On one hand, CPT symmetry indicates that time flowing forwards and time flowing backwards are just two sides of the same coin, but then on the other hand you say entropy grows with time. In the time-flowing-backwards scenario, wouldn't entropy decrease? That does seem to make a distinction between "past" and "future." | |
| Nov 24, 2014 at 14:04 | comment | added | Incnis Mrsi | Thermodynamics postulates irreversibility that doesn’t follow from anything in so called “fundamental” physical knowledge (such as quantum mechanics, particle physics, and relativity), and from no other “fundamental” sciences with a notable exception of physical cosmology. Only heavy blinders that (most of mainstream) physics wear since early 20th century can excuse such disgraceful treatment of irreversibility that is currently is one of problems of nature not satisfactory resolved. | |
| Nov 24, 2014 at 10:48 | comment | added | M.Herzkamp | @Incnis: Maybe I should have said "fundamental physical laws". Thermodynamical laws have statistical origin rather than physical. They are very well suited to describe a system with too many unknown degrees of freedom, but if you had perfect knowledge of a system and enough computational capacity, you would not need thermodynamics to predict the future of said system. | |
| Nov 23, 2014 at 6:35 | comment | added | Incnis Mrsi | “Physical laws” ≠ “quantum field theory + general relativity”. Or did Ī miss a resolution declaring thermodynamics unphysical? | |
| Jun 17, 2014 at 9:06 | history | answered | M.Herzkamp | CC BY-SA 3.0 |