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Carlo Rovelli is an Italian theoretical
physicist and writer who has worked in Italy, the United States and,
since 2000, in France.[1] He works mainly in the field of quantum
gravity and is a founder of loop quantum gravity theory. He has also
worked in the history and philosophy of science. Sette brevi lezioni di
fisica (Opere di Carlo Rovelli Vol. 1) He collaborates with several
Italian newspapers, including the cultural supplements of the Corriere
della Sera, Il Sole 24 Ore and La Repubblica.
His popular science book, Seven Brief Lessons on Physics,
was originally published in Italian in 2014. It has been translated into
41 languages[2] and has sold over a Sette brevi lezioni di fisica
(Opere di Carlo Rovelli Vol. 1) million copies worldwide.[3] In 2019, he
was included by Foreign Policy magazine in a list of 100 most
influential global thinkers.[4]
Carlo Rovelli was born in Verona, Italy, on 3 May 1956. He
attended the Liceo Classico Scipione Maffei in Verona. In the 1970s, he
participated in the student political Sette brevi lezioni di fisica
(Opere di Carlo Rovelli Vol. 1) movements in Italian universities. He
was involved with the free
political radio stations Radio Alice in
Bologna and Radio Anguana in Verona, which he helped found.[5] In
conjunction with his political activity, he was charged, but later
released, for crimes of opinion related to the book Fatti Nostri, which
he Sette brevi lezioni di fisica (Opere di Carlo Rovelli Vol. 1)
co-authored with Enrico Palandri, Maurizio Torrealta, and Claudio
Piersanti.[6]
In 1981, Rovelli graduated with a BS/MS in physics from the
University of Bologna, and in 1986 he obtained his PhD at the
University of Padova, Italy. Rovelli refused military service, which was
compulsory in Italy at the time, and was Sette brevi lezioni di fisica
(Opere di Carlo Rovelli Vol. 1) therefore briefly detained in 1987.[7]
He held postdoctoral positions at the University of Rome, the
International School for Advanced Studies in Trieste and at Yale
University. Rovelli was on the faculty of the University of Pittsburgh
from 1990 to 2000.[8] He currently works in the Centre de Physique
Théorique de Sette brevi lezioni di fisica (Opere di Carlo Rovelli Vol.
1) Luminy of Aix-Marseille University.[9] He has also held the post of
affiliated professor in the Department of History and Philosophy
of Science of the University of Pittsburgh.
In 1988, Rovelli, Lee Smolin and Abhay Ashtekar introduced a
theory of quantum gravity called loop quantum gravity. In 1995, Rovelli
and Smolin Sette brevi lezioni di fisica (Opere di Carlo Rovelli Vol.
1) obtained a basis of states of quantum gravity, labeled by Penrose's
spin networks, and using this basis they were able to show that the
theory predicts that area and volume are quantized. This result
indicates the existence of a discrete structure of space at a very small
scale. In 1997, Sette brevi lezioni di fisica (Opere di Carlo Rovelli
Vol. 1) Rovelli and Michael Reisenberger introduced a "sum over
surfaces" formulation of the theory, which has since evolved into the
currently covariant "spinfoam" version of loop quantum gravity. In 2008,
in collaboration with Jonathan Engle and Roberto Pereira, he has
introduced the spin foam vertex amplitude which is the basis of Sette
brevi lezioni di fisica (Opere di Carlo Rovelli Vol. 1) the current
definition of the loop quantum gravity covariant dynamics. Loop theory
is today considered a candidate for a quantum theory of gravity. It
finds applications in quantum cosmology, spinfoam
cosmology and quantum black hole physics.
In his 2004 book, Quantum Gravity, Rovelli developed a
formulation of classical and quantum Sette brevi lezioni di fisica
(Opere di Carlo Rovelli Vol. 1) mechanics that does not make explicit
reference to the notion of time. The timeless formalism is used to
describe the world in the regimes where the quantum properties of the
gravitational field cannot be disregarded. This is because the quantum
fluctuation of spacetime itself makes the notion of time Sette brevi
lezioni di fisica (Opere di Carlo Rovelli Vol. 1) unsuitable for writing
physical laws in the conventional form of evolution laws in time.
This position led him to face the following problem: if
time is not part of the fundamental theory of the world, then how does
time emerge? In 1993, in collaboration with Alain Connes, Rovelli
proposed a Sette brevi lezioni di fisica (Opere di Carlo Rovelli Vol. 1)
solution to this problem called the thermal time hypothesis. According
to this hypothesis, time emer
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