eccentric-nucleus said: How can entropy be reversed?
A longterm increase in entropy is the closest thing to a true physical law we can epistemologically have. It differs from other laws in that it’s not based only on observation, but very sound logic.
Let’s take an arbitrarily (but not infinitesimally) small unit of time delta. Before delta, we have a system in one state. After delta, the system will be in another state. There are three possible types of states after delta. The first is a state that requires more information to describe. The second is a state that requires the same amount of information. And the third is a state that requires less information. There are always more possible states of the first and second kind than there are of the third kind. The logical conclusion then, is that over multiple deltas, the odds of entropy decreasing get lower exponentially.
So, regardless of our observations of the physical universe, logic and math dictate the second law of thermodynamics.
Now that I’ve cleared up why entropy can’t be reversed, I’ll explain how we can go about reversing it!
First, some speculative hocus pocus:
If it turns out that the many-worlds interpretation of quantum mechanics is true, then every possible outcome after delta will be realized as a separate reality. In which case there will be some subset of naturally occurring realities where, against all odds, entropy keeps decreasing. And though the portion of these realities is extremely negligible relative to the number of realities in which entropy doesn’t decrease, there are still an infinite number of them.
Beyond that, we don’t really know to what extent we can manipulate the rules of the universe. It might eventually be possible to build something akin to Douglas Adam’s “improbability drive”. This as well would decrease entropy over time, simply because it’s an improbable thing to happen.
For a less speculative answer, it might be possible to use black holes to reverse entropy. Now, there is of course hawking radiation which occurs as a result of a virtual particle losing its antiparticle to a black holes event horizon thereby still allowing black holes to increase the amount of information required to describe the system which they are in. And there’s also the holographic model of the universe, which allows us to almost perfectly account for the amount of entropy lost in a black hole in absence of hawking radiation by simply taking the surface area of the black hole’s event horizon as the value for entropy. (There seems to be some debate as to which is the more legitimate model, and, while I haven’t actually looked at the math, I think the two models are probably equivalent. Ultimately they come down to modelling the entropy of a black hole based on its surface area. Hawking radiation models it indirectly as the number of anti particles lost at the event horizon (thereby just covering the even horizon in little photons) and the holographic model does it by modelling the surface area of the event horizon as a bunch of tiles encoded with information about the system.)
In any case, these things technically allow for entropy to keep increasing, but I think that, impractically speaking, it would be possible to form some black holes in a region of space where a galaxy is eventually going to cross so that the black holes bend space-time such that energy has a much lower affinity for escaping out into the further reaches of space. Once this is set up, most of the entropy will happen inside this playpen of black holes; and can then be harnessed by any smaller scale self organizing systems; which do tend to emerge in normalized random system. From the point of view of these smaller self organizing systems, the ambient energy would act for them as some sort of open system. Which, again, practically speaking, is all you really need to sustain life.
Alas, this can only go on for so long until the black holes wither and die due to hawking radiation. But if wormholes are possible, maybe one could devise a sort of loop to feed most of the lost energy on the outside of the black hole playpen back into the inside of the black hole playpen.
We talk for the first time after months of waiting and all you got to say about my voice is that it’s emotionless? That’s rude. But I love you so it’s okay. I forgive you for being stupid.
Whatever — the soup is getting cold.– Last sentence of a mathematical theorem in Leonardo da Vinci’s notebook, 1518 (via crematedadolescent)
(Source: free-parking)Via oo the death of god dollar big dollar huge dollar
August 19th 14 AD: Augustus dies
On this day in 14 AD the first Roman Emperor, Augustus, died aged 75. Born Gaius Octavius and known as Octavian, he was named as heir of his great uncle Julius Caesar. Upon Caesar’s assassination in 44 BC, Augustus formed an alliance - the Second Triumvirate - with Marcus Aemilius Lepidus and Mark Antony, to rule and take vengeance on Caesar’s assassins. The alliance soon fell apart and the three fought for sole rule of Rome. Octavian emerged victorious after defeating Mark Anthony at the Battle of Actium in 31 BC. Octavian then set about ‘restoring’ the Roman Republic, which had been ruled by Caesar as Dictator, by formally returning power to the Senate. However in reality the new leader kept considerable power in his person, adopting many titles which became part of the imperial pantheon, including ‘Augustus’ (which loosely translates as ‘magnificent’), ‘princeps’ (first citizen), ‘pontifex maximus’ (priest of Roman religion) and ‘tribunicia potestas’ (power over the tribune assemblies elected by the people). Augustus’s constitutional system gave way to the birth of the Principate, the first period of the Roman Empire. He is also considered the first Roman Emperor because the empire greatly expanded under his rule. Augustus died in 14 AD, and was succeeded by his step-son and adopted heir Tiberius. Augustus thus began the stable line of ‘adoptive’ Roman Emperors which ended with Marcus Aurelius’s decision to name his birth son Commodus, who came to power in 180 AD. This year is the momentous 2000th anniversary of the death of the first Roman Emperor. Even today Rome is remembered as a pinnacle of civilisation and empire and much of modern Europe continues to be shaped by its legacy.
2000 years ago today
#This could be us but you keep calling the police