C C > Apr 11, 2019 06:23 AM
Ostronomos > Apr 18, 2019 03:40 PM
(Apr 11, 2019 06:23 AM)C C Wrote: https://phys.org/news/2019-04-scientists...tures.html
EXCERPT: . . . A team of researchers from Nanyang Technological University, Singapore (NTU Singapore) and Griffith University in Australia have constructed a prototype quantum device that can generate all possible futures in a simultaneous quantum superposition.
[...] "The functioning of this device is inspired by the Nobel Laureate Richard Feynman," says Dr. Jayne Thompson, a member of the Singapore team. "When Feynman started studying quantum physics, he realized that when a particle travels from point A to point B, it does not necessarily follow a single path. Instead, it simultaneously transverses all possible paths connecting the points. Our work extends this phenomenon and harnesses it for modelling statistical futures."
The machine has already demonstrated one application—measuring how much our bias towards a specific choice in the present impacts the future. "Our approach is to synthesise a quantum superposition of all possible futures for each bias." explains Farzad Ghafari, a member of the experimental team, "By interfering these superpositions with each other, we can completely avoid looking at each possible future individually. In fact, many current artificial intelligence (AI) algorithms learn by seeing how small changes in their behaviour can lead to different future outcomes, so our techniques may enable quantum enhanced AIs to learn the effect of their actions much more efficiently."
The team notes while their present prototype simulates at most 16 futures simultaneously, the underlying quantum algorithm can in principle scale without bound. (MORE)
Zinjanthropos > Apr 18, 2019 03:58 PM
Quote:The team notes while their present prototype simulates at most 16 futures simultaneously, the underlying quantum algorithm can in principle scale without bound.
C C > Apr 18, 2019 06:12 PM
(Apr 18, 2019 03:58 PM)Zinjanthropos Wrote:Quote:The team notes while their present prototype simulates at most 16 futures simultaneously, the underlying quantum algorithm can in principle scale without bound.
How do they know there's an unlimited amount of possible paths per particle? I mean wouldn't one of the possibilities be that there's only one path (or none) it can take. Is there a possibility that all will take the same path or at least all end up at the same place?
Zinjanthropos > Apr 18, 2019 07:14 PM
Quote:Instead, it simultaneously transverses all possible paths connecting the points
C C > Apr 18, 2019 08:05 PM
(Apr 18, 2019 07:14 PM)Zinjanthropos Wrote:Quote:Instead, it simultaneously transverses all possible paths connecting the points
By it they mean one particle. Super positioning doesn't change that total. So does each and every particle share super positions with other particles so that they all coincide?
Zinjanthropos > Apr 19, 2019 01:25 AM
C C > Apr 19, 2019 06:19 PM
(Apr 19, 2019 01:25 AM)Zinjanthropos Wrote: Why isn’t super positioning (SP) considered a future for a quantum particle?
Ostronomos > Apr 20, 2019 07:48 PM
(Apr 19, 2019 06:19 PM)C C Wrote:(Apr 19, 2019 01:25 AM)Zinjanthropos Wrote: Why isn’t super positioning (SP) considered a future for a quantum particle?
"Superposition" (in QM) usually just refers to a particle being in different quantum states at the same time. Minus being part of an "evolving through time" computational endeavor simulating futures. Here this team is contending they can somehow manipulate configurations of qubits (possessing both "0" and "1" binary values simultaneously) to represent an _X_ macroscopic(?) item or set of affairs and computationally carry out multiple possible predictions for _X_ collectively in the same series of procedural operations.
Whereas it is the wave function that deals with a particle's information as a wave in the sense of assigning value to given points in space as to the likelihood at each of it being located there if interacted with (measured). Presumably that abstract distribution of a particle in conjunction with superposition is what their verbal gestures toward Feynman were waving at with regard to the wave-nature of a particle pursuing all routes to wind-up being located at point B -- or again one of the ontological interpretations of QM recruited and factoring into that if necessary.
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RainbowUnicorn > Apr 21, 2019 08:19 AM
(Apr 19, 2019 01:25 AM)Zinjanthropos Wrote: Why isn’t super positioning (SP) considered a future for a quantum particle?
Don’t know how to say this.... if SP is a property of the particle exhibited under certain condition then there is a guaranteed future for said particle just like heating water to its boiling point will produce.
So do we have a particle whose predictable future determines the unpredictable outcomes for something else, like observation?
I know I’m probably missing something but this is fun.
Quote:Why isn’t super positioning (SP) considered a future for a quantum particle?