Giorgio Parisi
Autor de In a Flight of Starlings: How Nature Unlocks the Wonders of Physics
Sobre El Autor
Créditos de la imagen: Lorenza Parisi
Obras de Giorgio Parisi
Etiquetado
Conocimiento común
- Nombre canónico
- Parisi, Giorgio
- Fecha de nacimiento
- 1948-08-04
- Género
- male
- Nacionalidad
- Italy
- Premios y honores
- Dannie Heineman Prize (Mathematical Physics, 2005)
Boltzmann Medal (1992)
Dirac Medal (1999)
Microsoft Award (2007)
Lagrange Prize (2009)
Miembros
Reseñas
También Puede Gustarte
Autores relacionados
Estadísticas
- Obras
- 19
- Miembros
- 173
- Popularidad
- #123,688
- Valoración
- 3.7
- Reseñas
- 3
- ISBNs
- 35
- Idiomas
- 6
My suspicions arose when I opened the file and found it was only 94 pages, divided over eight tiny chapters. At best, this could only be top line stuff. I was then disappointed with the first chapter, on murmurations, which revealed remarkably little. A bunch of Italian physicists concocted a gizmo of numerous synced cameras, each taking stills of a murmuration. They assembled the stills of different angles into a story of how it worked. There were so many images, they could have made an animation out of it, he says. Which poses the question: why didn’t they just use film and shoot it fast, so they could get a slow motion production that would show them everything they wanted to know? Instead, they took the long way round.
Their discoveries were quite limited. The cloud is not a sphere of starlings so much as a flat disk. This makes it easier to swing towards new directions, and makes it easier for individual birds to know their place in the scheme. They look forward only, to the bird ahead, maintaining constant distance so that all can fly at the same speed, much as humans driving at fast highway speeds do (for the most part). The direction and so the changing shape, is orchestrated from the edges of the murmuration rather than the center. If birds at the center tried to change the direction of the whole flock of thousands, it would result in a massive crash, but if the edge pulls away, the whole thing can gracefully stretch and change course, which is what makes it so entrancing. Finally, the density at the edges tends to be a good 30% more than in the center. This is why the murmuration seems to stretch into a new shape - starlings along the edges with no other bird beside them are what change its overall shape.
That’s it. Nothing too deep here. But since the book was supposed to be about complex systems, from a man who won a Nobel Prize for his insights, I eagerly ploughed onward. Unfortunately, it quickly degenerated into a memoir, whose most significant aspect was name dropping. Parisi knows, knew or at least acknowledges pretty much everyone who ever won a Nobel Prize in Physics (He won his in 2021). Everyone is a giant, and they all do great work. Got it.
When he finally gets back to entertaining the reader with what ought to be fascinating observations, it is about theoretical constructs, nothing like murmurations. He goes on endlessly about the three phases of water and the physics of phase transition, for example. The other major systems chapter is on disorder – spin glasses. Here’s his definition: “Disorder is born from the fact that certain elementary entities behave differently from others: some spins try to go in opposite directions; certain atoms are different from most others; certain financial actors sell shares that others are buying; some dinner guests actively dislike others who have been invited and want to sit as far away from them as possible.” I’m not sure that explains anything.
In between, there are chapters on Italian physicists he knows, his own history, which began in university in the keystone year of 1968, which he explains in detail, and anecdotes about other physicists and school in Italy.
It seems physicists can get their ideas from anywhere. Sometimes it takes years to develop them, and all it took was another physicist asking a pointed question. Einstein began thinking about relativity after he watched a housepainter falling from the scaffold around his apartment building. The painter was sitting in a chair the entire time. This is apparently what got Einstein thinking. And he changed the world with it.
So I really couldn’t wrap my head around what the book was even about. It certainly wasn’t complex systems in nature, as the title implied. Then, in the very last paragraph, Parisi finally lets the secret out: “This book is my attempt to convey to a wide readership something of the beauty, importance, and cultural value of modern science.” But that’s not what was advertised.
David Wineberg… (más)