Reddit’de son birkaç gündür konuşulan “en zeki SF yazarları hangileri” konulu bir başlıkta gördüm, yorumlar bizim Diaspora etkinliği planımızın üstüne gelince güldürdü.
Demin kitabı biraz göz gezdirdim, ilk 50-60 sayfadaki zorlu makine öğrenmesi ve yapay zekanın bilinçlendirilmesi kısımlarını pes etmeden aşabilirsek sanırım konu bilgisayar biliminden astrofiziğe ve teorik fiziğe kayıyor.
- bölümden bir pasaj :
The macrosphere’s four-dimensional standard fibre yielded a much smaller set of fundamental particles than the ordinary universe’s six-dimensional one. In place of six flavours of quarks and six flavours of leptons there was just one of each, plus their antiparticles. There were gluons, gravitons and photons, but no W or Z bosons, since they mediated the process of quarks changing flavour. Three quarks or three antiquarks together formed a charged ‘nucleon’ or ‘anti-nucleon’, similar to an ordinary proton or antiproton, and the sole lepton and its antiparticle were much like an electron and positron, but there was no combination of quarks analogous to a neutron.
Orlando scrutinized the table of particles. “The lepton is still much lighter than the nucleon, the photon still has zero rest mass, and the gluons still act like gluons … so what shifts the chemical energy closer to the nuclear?”
“You saw what happened with the gravity wells.”
“What’s that got to do with it? Ah. Same thing happens in an atom? Electrostatic attraction also goes from inverse-square to inverse-fourth, so there are no stable orbits?”
“That’s right.”
“Hang on.” Orlando screwed his eyes shut, no doubt dredging ancient memories of his flesher education.
“Doesn’t the uncertainty principle keep electrons from crashing into the nucleus? Even if there’s no angular momentum, the attraction of the nucleus can’t squeeze the electron’s wave too tightly, because confining its position just increases its momentum.”
“Yes. But increases it how much? Confining a wave spatially has an inverse effect on the spread of its momentum. Kinetic energy is proportional to the square of momentum, making that inverse-square. So the effective force, which is the rate of change of kinetic energy with distance, is inverse-cube.”
Orlando’s face lit up for a moment with the sheer pleasure of understanding. “So in three dimensions, a proton can’t ever make an electron crash, because the uncertainty principle is just as good as centrifugal force. But in five dimensions, that’s not good enough.” He nodded slowly, as if coming to terms with the inevitability of it. “So the lepton’s wave shrinks down to the size of the nucleon. Then what?”
Egan’ın Diaspora’yı anlamaya yardımcı olsun diye yarattığı materyallere bir göz atabilirsiniz. Şimdiye kadar beraber okuduğumuz en zor kitap olacak muhtemelen, umarım bu ağırlığın altında ezilmeyiz.
Alakasız bilgi: Aynı başlıkta Stanislaw Lem’in > 180 IQ’yla zamanında Güney Polonya’daki en zeki çocuk olduğunu öğrendim.
“I was a good student. Some years after the war, I learned from an older man who had held some position or other in the prewar Polish educational system that when the IQs of all high-school students were tested — it must have been around 1936 or 1937 — mine was over 180, and I was said to have been, in the words of that man, the most intelligent child in southern Poland.”