I read an article in "Scientific American" about how much information can be compressed into a certain volume, and apparently all objects have a Shannon entropy in addition to the thermodynamic entropy. Also, black holes have a Shannon entropy that is based on the surface area of the event horizon. I was totally lost. Can anybody else explain how Shannon's information theory applies to black holes? -Kevin
Shannon Entropy for Black Holes
Started by ●October 31, 2003
Reply by ●October 31, 20032003-10-31
Kevin Neilson wrote:> Can anybody else explain how Shannon's information > theory applies to black holes?Sounds like just the place for a First In Never Out (FINO) transmit buffer. -- Mike Treseler
Reply by ●October 31, 20032003-10-31
Kevin, Really quite easy. Just read http://www.mdpi.org/entropy/papers/e3010012.pdf Now after you have read it, go get a stiff drink ....and then fall into a troubled sleep. As you toss and turn having nightmares about information horizons, and gravity strings, remember what the White Rabbit said: "feed your hair." How many bits can fit on the surface of a black hole? (2003) How many Angel's can fit on the head of a pin? (1536) A question for every age. Austin Kevin Neilson wrote:> I read an article in "Scientific American" about how much information can be > compressed into a certain volume, and apparently all objects have a Shannon > entropy in addition to the thermodynamic entropy. Also, black holes have a > Shannon entropy that is based on the surface area of the event horizon. I > was totally lost. Can anybody else explain how Shannon's information > theory applies to black holes? > -Kevin
Reply by ●October 31, 20032003-10-31
"Austin Lesea" <Austin.Lesea@xilinx.com> wrote in message news:3FA3000A.45C10F96@xilinx.com...>> > How many bits can fit on the surface of a black hole? (2003)Actually the entropy of a black hole works out to be about 10^66 bits/ cm^2. Clay
Reply by ●October 31, 20032003-10-31
Mike Treseler wrote:> Kevin Neilson wrote: > >> Can anybody else explain how Shannon's information >> theory applies to black holes? > > > Sounds like just the place for a > First In Never Out (FINO) transmit buffer. > > -- Mike Treseler >Is that FINO or AMONTILLADO? jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Reply by ●November 1, 20032003-11-01
On Fri, 31 Oct 2003 20:43:36 -0500, "Clay S. Turner" <physics@bellsouth.net> wrote:>"Austin Lesea" <Austin.Lesea@xilinx.com> wrote in message >news:3FA3000A.45C10F96@xilinx.com... >>> >> How many bits can fit on the surface of a black hole? (2003) > >Actually the entropy of a black hole works out to be about 10^66 bits/ cm^2. > >ClayI've worked with people denser than that. Or so it seemed, anyway... Eric Jacobsen Minister of Algorithms, Intel Corp. My opinions may not be Intel's opinions. http://www.ericjacobsen.org
Reply by ●November 2, 20032003-11-02
"Kevin Neilson" <kevin_neilson@removethiscomcast.net> wrote in message news:<ZzCob.71991$Fm2.57178@attbi_s04>...> I read an article in "Scientific American" about how much information can be > compressed into a certain volume, and apparently all objects have a Shannon > entropy in addition to the thermodynamic entropy. Also, black holes have a > Shannon entropy that is based on the surface area of the event horizon. I > was totally lost. Can anybody else explain how Shannon's information > theory applies to black holes? > -KevinI am really curious to know how thermodynamic entropy differs from Shannon's -if both based on "disorderness". Hawking's popular book "brief history of time" has a chapter on "arrow of time" which referred themodynamical entropy and at the same time "orderness" due to expansion of universe- bit abstract! Since we know entrpy of the universe increases - it is interesting what will happen to Shannon's entropy (if it is related!)- does information of the universe increase-big question!!! santosh
Reply by ●November 3, 20032003-11-03
Mike Treseler <mike.treseler@flukenetworks.com> wrote in message news:<3FA2FC98.4030800@flukenetworks.com>...> Kevin Neilson wrote: > > Can anybody else explain how Shannon's information > > theory applies to black holes? > > Sounds like just the place for a > First In Never Out (FINO) transmit buffer. > > -- Mike TreselerI had to debug somebody else's hardware that implemented a FINO He had invented the wonderful new memory type... 2K by 8 WOM Write-Only Memory :-) Ian
Reply by ●November 3, 20032003-11-03
"Kevin Neilson" <kevin_neilson@removethiscomcast.net> wrote in message news:ZzCob.71991$Fm2.57178@attbi_s04...> I read an article in "Scientific American" about how much information canbe> compressed into a certain volume, and apparently all objects have aShannon> entropy in addition to the thermodynamic entropy. Also, black holes havea> Shannon entropy that is based on the surface area of the event horizon. I > was totally lost. Can anybody else explain how Shannon's information > theory applies to black holes? > -Kevin > >For the ignorant (me): what it Entropy? Rich
Reply by ●November 3, 20032003-11-03
> I had to debug somebody else's hardware that implemented a FINO > > He had invented the wonderful new memory type... 2K by 8 WOM > > Write-Only Memory :-) > > IanHi Ian. Sorry but my WOM has 1Mbitx16, it�s implemented on strained silicon, has a life expectancy of almost 10 write cycles and I think it doesn't loose it contents when power is turned off (for obvious reasons I couldn't test this) :) I'm looking for funds to maintain this important research. Anyone? Luiz Carlos
