A Quote by David Deutsch

The most important application of quantum computing in the future is likely to be a computer simulation of quantum systems, because that's an application where we know for sure that quantum systems in general cannot be efficiently simulated on a classical computer.
We couldn't build quantum computers unless the universe were quantum and computing. We can build such machines because the universe is storing and processing information in the quantum realm. When we build quantum computers, we're hijacking that underlying computation in order to make it do things we want: little and/or/not calculations. We're hacking into the universe.
The history of the universe is, in effect, a huge and ongoing quantum computation. The universe is a quantum computer.
My hacking involved pretty much exploring computer systems and obtaining access to the source code of telecommunication systems and computer operating systems, because my goal was to learn all I can about security vulnerabilities within these systems.
When you zap things with light to build quantum computers, you're hacking existing systems. You're hijacking the computation that's already happening in the universe, just like a hacker takes over someone else's computer.
Quantum Mechanics is different. Its weirdness is evident without comparison. It is harder to train your mind to have quantum mechanical tuition, because quantum mechanics shatters our own personal, individual conception of reality
Scientific realism in classical (i.e. pre-quantum) physics has remained compatible with the naive realism of everyday thinking on the whole; whereas it has proven impossible to find any consistent way to visualize the world underlying quantum theory in terms of our pictures in the everyday world. The general conclusion is that in quantum theory naive realism, although necessary at the level of observations, fails at the microscopic level.
Nevertheless, all of us who work in quantum physics believe in the reality of a quantum world, and the reality of quantum entities like protons and electrons.
I once pitched this show that was just like 'Quantum Leap,' in terms of the set-up, and I got a pass because they said 'Quantum Leap' didn't work, even though it was on for six or seven seasons. You can't say 'Quantum Leap' didn't work!
It was a dogma throughout most of the 20th century that quantum science only applied to subatomic matter, and we now know that not to be true. One of the major discoveries was Quantum Holography.
Certainly we do not need quantum mechanics for macroscopic objects, which are well described by classical physics - this is the reason why quantum mechanics seems so foreign to our everyday existence.
I've been very involved in this quantum holographic formalism and helping to explore it as explanatory of the very root of our perceptual capabilities. It is postulated, for example, that this very basic entanglement, at the quantum level, at the level of subatomic matter, is really a part of quantum mechanics.
This book is unique. I know of no other which so artfully tackles two of the greatest mysteries of modern science, quantum mechanics, and consciousness. It has long been suspected that these mysteries are somehow related: the authors’ treatment of this thorny and controversial issue is honest, wide-ranging, and immensely readable. The book contains some of the clearest expositions I have ever seen of the strange and paradoxical nature of the quantum world. Quantum Enigma is a pleasure to read, and I am sure it is destined to become a classic.
The incomplete knowledge of a system must be an essential part of every formulation in quantum theory. Quantum theoretical laws must be of a statistical kind. To give an example: we know that the radium atom emits alpha-radiation. Quantum theory can give us an indication of the probability that the alpha-particle will leave the nucleus in unit time, but it cannot predict at what precise point in time the emission will occur, for this is uncertain in principle.
Classical physics has been superseded by quantum theory: quantum theory is verified by experiments. Experiments must be described in terms of classical physics.
In quantum mechanics there is A causing B. The equations do not stand outside that usual paradigm of physics. The real issue is that the kinds of things you predict in quantum mechanics are different from the kinds of things you predict using general relativity. Quantum mechanics, that big, new, spectacular remarkable idea is that you only predict probabilities, the likelihood of one outcome or another. That's the new idea.
Objects obey quantum laws- they spread in possibility following the equation discovered by Erwin Schodinger- but the equation is not codified within the objects. Likewise, appropriate non-linear equations govern the dynamical response of bodies that have gone through the conditioning of quantum memory, although this memory is not recorded in them. Whereas classical memory is recorded in objects like a tape, quantum memory is truly the analog of what the ancients call Akashic memory, memory written in Akasha, Emptiness- nowhere.
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