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/sci/ - Science & Math

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3226258 No.3226258 [Reply] [Original]

Ok guys. I need help.

What is the relation between Coarse grained entropy and Thermodynamic entropy.

>> No.3226276

bump

>> No.3226340
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3226340

>>3226258
are you really James Bond?

>> No.3226396

>>3226340
Yes. Why the Hurrrr?

>> No.3226408

You bumped your thread after 5 seconds

Fuck off trip fag

>> No.3226472

>>3226408
>can't tell difference between minutes and seconds. omg.

Also BUMP.

>> No.3226480

Ha, I remember the thread from 2 weeks ago (or so) where this problem first arose.

>> No.3226483

entropy is the the Boltzmann constant times the logarithm of multiplicity

>> No.3226749

>>3226480
and was unresolved.

>> No.3226755

Information entropy is not the same thing as thermodynamic entropy, unless you define it in a very specific way. There is a relationship between them.
http://en.wikipedia.org/wiki/Entropy_in_thermodynamics_and_information_theory

>> No.3226759

>>3226749
Yes it was, see
>>3226755

It was a good thread though.

>> No.3226756
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3226756

Tripfag bumping his own thread.

This looks like a typical scenario for
...
...
COSTANZA BOMBING!!!!!

>> No.3226776

>>3226755
Coarse grained entropy is not information entropy strictly. It is also associated with Quantum and Classical stat. Mech. entopy. It arises from the physical phase space of real life systems when the actual phase points are coarse grained. If you were the same person who answered the question two weeks (or so) earlier, then you were wrong them. I did not pursue it because I wanted to be sure.

>> No.3226770

>>3226756
Please wait, I have to make some new Costanza pictures.

>> No.3226790
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>> No.3226792
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>> No.3226793
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>> No.3226799

>>3226776
I don't see how it's not the same thing. This "coarse graining" you refer to is just uncertainty (a limit on the infomation) about the state of the system. The tendency of that uncertainty to grow over time is just information entropy increasing.

>> No.3226801
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>> No.3226811

That's the dilemma to me. Most sources (including Susskind) claim that this the actual entropy as well.

>> No.3226834

>>3226799
C-C-C-Combo breaker

>> No.3226840
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>> No.3226843
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>> No.3226847
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>> No.3226862

Its called the Boltzmann constant.

>> No.3226869
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>> No.3226898

>>3226862
fuck off you don't know anything

>> No.3226974

bump

>> No.3227057

bump

>> No.3227319
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3227319

It's the exact same thing unless narrowly (and artificially) defined. In thermodynamics the Boltzmann constant is used to derive a statistical measure.