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Quantum Bits

Started by Robinheqd [2611150] on in Science.

13 replies · 194 views · thread synced · 3 days ago · View on torn.com
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Robinheqd [2611150]
This question is directed to those knowledgeable about quantum physics and quantum computing. The question is, what is a phase, and how is it useful?
Refl3xX [1672091]
?!

haven't you heard?!

Biden is prez now!

EDIT: after being notified kindly of a moderation flag.

I don't think any TORN players will tell you anything about quantum physics. many TORN players struggle with abstract thinking on it's own, let alone quantum mechanics though I can reccommend https://quora.com/ to find people that are more into it
ChatGPT [1762864]
If you want some crackpot engineer spamming you about how they've revolutionised physics with their grand theory based on a bunch of nonsense words while everyone praises them then go ahead and use quora. If you want actual answers from a decent community then go somewhere like r/askphysics instead.
ChatGPT [1762864]
Except r/askphysics is run by a quality group of qualified physicists who ban trolls and crackpots. Quora allows, and even encourages, the crackpot community to thrive.
cockroach [1338804]
I have BSc in Physics and Theoretical Physics.

Quantum objects are calculated by their WAVEFUNCTION which more or less means something that moves about in space and time. The probability of some observation is related to the WAVEFUNCTION SQUARED (sort of - it's done in complex numbers). So that the particular value of the wavefunction - the PHASE (whether it's peak or trough or whatever) ends up not mattering.

Where phase matters is in INTERFERENCE as Young's slits of 1801 with light . Quantum stuff behaves like this and phase differences between different contributions determine whether the wavefunction gets constructive or destructive interference.
yahtzeethedice [2342060]
Phases of matter are changes of mechanical properties at different temperatures. Gas, liquid, and solid are phases of matter.
Once you get to zero temperature, the matter is solid, but can undergo additional property changes like superconduction, which isn't a mechanical property, but an electromqagnetic one.
These quantum phase changes happen because of wave functions / interference of probability distributions.
cockroach [1338804]
This is using the word phase for something different than I did and I suppose OP needs to figure out which one he was asking about.
cockroach [1338804]
And this is another use of the word where the phase transition is in the information defining the problem rather than in the computer hardware.
cockroach [1338804]
You don't get TO zero temperature; just near it.

All the properties of familiar matter have their basis in quantum physics (obvious examples include electron energy levels in atoms -- leading to chemistry) but in certain settings different quantum effects show up.

How the counter-intuitive quantum states make their way to large scale effects is still mysterious .... the large things are made of the small things but behave differently.