Arrows of Time
quantamagazine.org
Arrows of Time
1–10 of 18 posts
Re: Arrows of Time
#2They completely forget one of the most famous historical historical clocks which preceded the Chinese mechanical clock (1090CE) they listed by about 280 years (807CE).
It was gifted to Charlemagne, the Holy Roman Emperor, by Harūn al-Rashīd: https://muslimheritage.com/baghdad-clock/
Re: Arrows of Time
#3> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow.
There is an alternative, much simpler way of looking at it that dates back to an overlooked 1996 paper by Nicolas Cerf and Christof Adami: the arrow of time depends on entanglement because that's the only way to get classical correlations (i.e. memories) out of quantum mechanics.
https://blog.rongarret.info/2014/09/are-parallel-universes-r...
https://blog.rongarret.info/2014/10/parallel-universes-and-a...
You can arrive at the same conclusion relying solely on the theory of decoherence, which can be traced back as early as 1970:
Re: Arrows of Time
#4> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow. There is an alternative, much simpler way of looking at it that dates back to an overlook…
This is way off-topic, but...
I remember reading once the idea that cats can remember the future.
But I am unable to re-locate the source of this idea. Can anyone help ?
Re: Arrows of Time
#5see also "Arrow of Entropic Time": https://www.youtube.com/watch?v=i6rVHr6OwjI
(or should that be "ǝɯᴉʇ ɔᴉdoɹʇuǝ ɟo ʍoɹɹɐ"?)
Re: Arrows of Time
#6> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow. There is an alternative, much simpler way of looking at it that dates back to an overlook…
This is way off-topic, but... I remember reading once the idea that cats can remember the future. But I am unable to re-locate the source of this idea. Can anyone help ?
No, because it's BS.
Re: Arrows of Time
#7> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow. There is an alternative, much simpler way of looking at it that dates back to an overlook…
This is way off-topic, but... I remember reading once the idea that cats can remember the future. But I am unable to re-locate the source of this idea. Can anyone help ?
closest I know of is the short story: F Lieber, "Space-Time for Springers" (1958)
Re: Arrows of Time
#8> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow. There is an alternative, much simpler way of looking at it that dates back to an overlook…
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Re: Arrows of Time
#9> In an influential [2008] paper, Noah Linden, Sandu Popescu, Tony Short and Andreas Winter argued that the arrow of time can be explained in terms of quantum mechanical entanglement. As a physical system becomes entangled with its surroundings, it moves closer to equilibrium — and this one-way evolution determines time’s arrow. There is an alternative, much simpler way of looking at it that dates back to an overlook…
This is way off-topic, but... I remember reading once the idea that cats can remember the future. But I am unable to re-locate the source of this idea. Can anyone help ?
You might be thinking about about done cats and dogs can tell an earthquake is coming a minute or two before it hits. That's not as much remembering the future as it likely is having a sense that we don't. But, it can feel like it
Re: Arrows of Time
#10They completely forget one of the most famous historical historical clocks which preceded the Chinese mechanical clock (1090CE) they listed by about 280 years (807CE). It was gifted to Charlemagne, the Holy Roman Emperor, by Harūn al-Rashīd: https://muslimheritage.com/baghdad-clock/
I wish they would have said something about the Antikyrthera mechanism, an analog computer from the 2nd century BC capable of complex astronomical predictions and that was about one and half thousand years early compared to the next time we saw similar devices.