Andrei Linde

Andrei Linde
Born	(1948-03-02) March 2, 1948 (age 64) Moscow, Russian SFSR, Soviet Union (now Russia)
Citizenship	American
Nationality	Russian
Fields	Theoretical physics, cosmology
Institutions	Stanford University
Alma mater	Moscow State University
Known for	Inflationary universe
Notable awards	Dirac Medal (2002)

Andrei Dmitriyevich Linde (Russian: Андрей Дмитриевич Линде; born March 2, 1948) is a Russian-American theoretical physicist and professor of Physics at Stanford University. Dr. Linde is best known for his work on the concept of the inflationary universe. He received his Bachelor of Science degree from Moscow State University. In 1975, Linde was awarded a Ph.D. from the Lebedev Physical Institute in Moscow. Among the various awards he's received for his work on inflation, in 2002 he was awarded the Dirac Medal, along with Alan Guth of MIT and Paul Steinhardt of Princeton University.

Linde's key idea

Linde is best known for proposing "eternal chaotic inflation" to explain a number of problems in cosmology. This variant of cosmic inflation proposes that the false vacuum is eternally inflating in exponential growth powered by repulsive constant random zero point dark energy of negative pressure. This false vacuum is like supersaturated steam in which liquid bubbles of more stable vacuum form with Higgs-Goldstone fields that describe the cohering of most of the pre-inflationary random dark energy into the smooth fabric of curved spacetime. Our universe is only a small causal part of a single bubble, and there are 10^10^10^7 bubbles. In fact, there are 10^10^10^7 of universes like ours on a single bubble which is more like an expanding infinite sheet than a finite spherical surface (suppressing 1 space dimension for ease of visualization).

Lee Smolin in his The Trouble With Physics and others have argued that Linde's theory is not falsifiable in the sense of Popper, if nonlocal signals outside of the local light cones are not possible. Nonlocal signals would be possible if there were stable traversable wormholes connecting the different "Hubble horizon limited" "pocket universes" (Leonard Susskind) on the same bubble, and on different bubbles making up a multiverse (see also floating branes). Antony Valentini has proposed a generalization of quantum theory that allows a kind of nonlocal signaling that orthodox quantum theory forbids.

External links

This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations. (November 2010)

• Andrei Linde's webpage at Stanford University.
• Linde, Andrei (2004) "Inflation, Quantum Cosmology and the Anthropic Principle" in John Barrow, Paul C W Davies, and C L Harper, eds., Science and Ultimate Reality: From Quantum to Cosmos, a volume honoring John A. Wheeler's 90th birthday. Cambridge University Press.
• Slack, Gordy (1998) "Faith in the Universe: Conversations with cosmologists," California Wild 51(3). Mentions Linde's views on religious belief.
• Andre Linde Radio Interview on Entitled Opinions