[ExI] [Extropolis] Crosspost

[Jason Resch]

On Wed, Apr 16, 2025, 7:33 PM Adrian Tymes via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> On Wed, Apr 16, 2025 at 7:21 PM Jason Resch via extropy-chat <
> extropy-chat at lists.extropy.org> wrote:
>
>> On Wed, Apr 16, 2025, 6:05 PM Adrian Tymes via extropy-chat <
>> extropy-chat at lists.extropy.org> wrote:
>>
>>> This rules out computers being made out of gas and plasma, how?
>>>
>>> Maybe they would need to use a lot more energy.  The Sun's temperature
>>> is around 15 million Kelvin, vs. room temperature being a few hundred
>>> Kelvin, so maybe a bit less than 100,000 times as much as a computer on
>>> Earth.  Being literally inside the Sun, abundant energy would be available
>>> - more than 100,000 times what is available on Earth.
>>>
>>
>> A difference in energy between two locations is required if the energy is
>> to be applied to perform work.
>>
>> There's lots of usable energy at the sun's surface (because you can make
>> that heat do something useful before sending it off into cold space) but
>> very little can be done with all the heat within in the sun while inside
>> the sun.
>>
>
> Fair enough, though even just confined to the surface layers of the sun,
> that's still quite a lot of potential.
>

There is. At the Launder limit, the sun can power 10^48 operations per
second at room temperature.

However, using reversible computing, you could achieve 10^50 computations
per second using no energy and just 1 kg of matter.

Jason
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