Quotes About Quantum

Medical physics is an applied area of physics.

The effect of the 'time becomes space' proposal is that there is no definite moment or point of creation. In more conventional quantum mechanical terms we would say that the universe is the result of a quantum mechanical tunneling process, where it must be interpreted as having tunneled from nothing at all. Quantum tunneling processes, which are familiar to physicists and routinely observed, correspond to Transitions which do not have a classical path.

Since so much of the physical universe, from brain waves to quantum waves, relies upon travelling waves we appreciate the key role played by the dimensionality of our space in rendering its contents intelligible to us.

As we look way back into the first instants of the Big Bang, we find the quantum world that we described in Chapter 3. From that state, where like effects do not follow from like causes, there must somehow emerge a world resembling our own, where the results of most observations are definite. This is by no means inevitable and may require the Universe to have emerged from a rather special primeval state.

Whatever the ultimate Theory of Everything is found to be, it will have a limiting form which describes motion at speeds far less than that of light in weak gravity fields where quantum wavelike features of mass are negligible. This form will be the one that Newton found.

The quantum wavelength of a particle gets smaller the more massive the particle. Situations are dominated by quantum waviness when the quantum wavelength of their participants exceeds their physical size. Everyday objects, like cars and speeding cricket balls, have such high masses that their quantum wavelengths are vastly smaller than their sizes and we can forget about quantum influences when driving cars or watching cricket matches.

One of the curious problems of physics is that it has two beautifully effective theories – quantum mechanics and general relativity – but they govern different realms of Nature.

Quantum mechanics holds sway in the microworld of atoms and elementary particles. It teaches us that every mass in Nature, however solid or pointlike it may appear, has a wavelike aspect. This wave is not like a water wave. It is more analogous to a crime wave or a wave of hysteria: it is a wave of information.

Moreover it is assumed that wormholes only join universes to baby universes, or universes to themselves; there are no wormholes joining different baby universes in this approximation, nor are there allowed to be wormholes which split up into two or more other wormholes.

You can't say A is made of B or vice versa. All mass is interaction.

The situation is now ripe for superposition!

String theory is an attempt at a deeper description of nature by thinking of an elementary particle not as a little point but as a little loop of vibrating string.

The thing with the Rolexes is amazing, amazing, Ivan wrote. Light, he said, seemed to sweep, but quantum theory said it ticked. Waves were the combination of sweeping and ticking. Could true sweeping ever happen on this Earth of ours? Maybe one could do sweeping math, og sweeping sex. Sweeping was beautiful, but powerless. Energy came from ticking - the capacity for rapid change. Immortality was sweeping. Lives coming and going, generations, years, minutes, seconds: all are on the fake Rolex.

But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.

The entire spread-out field comes through both slits and fills the region between source and screen, but...this field must deposit its quantum of energy all at once, in a single instant, because the field cannot carry some fraction of one quantum-it must always contain either exactly one or exactly zero quanta of energy. When the field deposits its quantum of energy on the viewing screen, the entire spread-out field must instantaneously lose this much energy.

Space can vibrate, space can fluctuate, space can be quantum mechanical, but what the devil is it? And, you know, everybody has their own idea about what it is, but there's no coherent final consensus on why there is space.

Liquid helium belongs to a class of fluids known as quantum fluids, as distinct from classical fluids.

The field of quantum valence fluctuations was another older interest which became much more active during this period, partly as a consequence of my own efforts.

In fact any experiment that measures a quantum effect is one in which the quantum effect is aligned with the behavior of some heavy, macroscopic object; that's how we measure it.

The chaos can act as a magnifier of quantum fluctuations so that they can produce sizable effects in the world around us. But we know that that can happen often.

It is astonishing that human brains, which evolved to cope with the everyday world, have been able to grasp the counterintuitive mysteries of the cosmos and the quantum.

If we do get a quantum theory of spacetime, it should answer some of the deepest philosophical questions that we have, like what happened before the big bang?

To me quantum computation is a new and deeper and better way to understand the laws of physics, and hence understanding physical reality as a whole.

Whether you can go back in time is held in the grip of the law of quantum gravity.