A pioneer in quantum computation and quantum information theory, David Deutsch now seeks to define the boundaries between the possible and the impossible.

Why you should listen

David Deutsch is a physicist and author who is, as he puts it, "interested in anything fundamental." He discovered the first quantum algorithm and is the codiscoverer, with Richard Jozsa, of the first quantum algorithm that could solve certain problems exponentially faster than anything available to classical computer science.

Deutsch has proposed constructor theory, which postulates that all laws of nature can be expressed in terms of whether a task is possible or impossible -- a theory that extends not only to computation, but also into everything that exists. He is a proponent of the multiverse interpretation of quantum mechanics, which has the startling implication that every physically possible event exists somewhere within an infinite fabric of co-existing universes.

He is the author of The Beginning of Infinity and The Fabric of Reality.

What others say

“Amazingly enough, it is Deutsch's idea -- one he has harbored since childhood, he says -- to truly understand "everything" that is known. Even more amazing is how close he seems to have come and how well he explains it to the rest of us.” — The San Jose Mercury News

More news and ideas from David Deutsch

A new way to explain explanation: David Deutsch on TED.com

October 26, 2009

For tens of thousands of years our ancestors understood the world through myths, and the pace of change was glacial. The rise of scientific understanding transformed the world within a few centuries. Why? Physicist David Deutsch proposes a subtle answer.(Recorded at TEDGlobal 2009, July 2009, Oxford, UK. Duration: 16:39) Twitter URL: http://on.ted.com/4G Watch David Deutsch’s […]

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David Deutsch at TEDGlobal 2009: Running notes from Session 5

July 22, 2009

Unedited running notes from TEDGlobal 2009. Our ancestors wondered what stars are. Humans have always yearned to know more — it is a survival instinct. “How can I be warmer, cooler, safer, in less pain?” Prehistoric cave artists may have wished to draw better. But although they wished for more knowledge, for progress, they failed. […]

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