Quantum Physics vs. Quantum Mechanics

Forum4PoliticsBot · Apr 10, 2012

I want to know what the difference is between quantum physics and quantum mechanics. Can someone explain it to me?

Thread started at Forum 4 Politics on 04-08-2012 04:56 PM

waltky · Sep 7, 2012

possum thinks its a good idea - if it works...

Quantum test pricks uncertainty
7 September 2012 - The experiment requires preparing pairs of "entangled" photons, the particles from which light is made

Pioneering experiments have cast doubt on a founding idea of the branch of physics called quantum mechanics. The Heisenberg uncertainty principle is in part an embodiment of the idea that in the quantum world, the mere act of observing an event changes it. But the idea had never been put to the test, and a team writing in Physical Review Letters says "weak measurements" prove the rule was never quite right. That could play havoc with "uncrackable codes" of quantum cryptography.

Quantum mechanics has since its very inception raised a great many philosophical and metaphysical debates about the nature of nature itself. Heisenberg's uncertainty principle, as it came to be known later, started as an assertion that when trying to measure one aspect of a particle precisely, say its position, experimenters would necessarily "blur out" the precision in its speed. That raised the spectre of a physical world whose nature was, beyond some fundamental level, unknowable.

This problem with the act of measuring is not confined to the quantum world, explained senior author of the new study, Aephraim Steinberg of the University of Toronto. "You find a similar thing with all sorts of waves," he told BBC News. "A more familiar example is sound: if you've listened to short clips of audio recordings you realise if they get too short you can't figure out what sound someone is making, say between a 'p' and a 'b'. "If I really wanted to say as precisely as posible, 'when did you make that sound?', I wouldn't also be able to ask what sound it was, I'd need to listen to the whole recording."

The problem with Heisenberg's theory was that it vastly predated any experimental equipment or approaches that could test it at the quantum level: it had never been proven in the lab. "Heisenberg had this intiuition about the way things ought to be, but he never really proved anything very strict about the value," said Prof Steinberg. "Later on, people came up with the mathematical proof of the exact value."

'Full of uncertainty'
Click to expand...

Wolverine · Sep 9, 2012

Forum4PoliticsBot said: ↑

I want to know what the difference is between quantum physics and quantum mechanics. Can someone explain it to me?

Thread started at Forum 4 Politics on 04-08-2012 04:56 PM
Click to expand...

They are one and the same from my understanding.

DarkDaimon · Sep 9, 2012

They are the same. It is also called Quantum Theory.

waltky · Sep 9, 2012

Daiman wrote: They are the same. It is also called Quantum Theory.

V-e-r-r-y interesting...

... but which is heavier...

... a quantum fulla feathers...

... or a quantum fulla bowlin' balls?

Log in or Sign up

Quantum Physics vs. Quantum Mechanics

Forum4PoliticsBot New Member

waltky Well-Known Member

Wolverine New Member Past Donor

DarkDaimon Well-Known Member

waltky Well-Known Member

Share This Page

Log in or Sign up

Quantum Physics vs. Quantum Mechanics

Forum4PoliticsBot New Member

waltky Well-Known Member

Wolverine New Member Past Donor

DarkDaimon Well-Known Member

waltky Well-Known Member

Share This Page

Useful Searches