r/QuantumPhysics

▲ 2 r/QuantumPhysics+1 crossposts

Quantum Computing: The future

Stay tuned..i will cover every important detail about quantum Computing in upcoming videos

u/Vivid-Height9891 — 2 days ago

Need Guidance

I’ve grown this interest in physics. I think I’ve set in on quantum physics and engineering as my choice of study. I have very little mathematical knowledge ( The basics ), I know that is an area on which I need to commit time and energy towards. Does anyone have any advice for someone like me who wants this. Any resources that can help me, or at the very least get my foot into the door. There is only so much YouTube can teach.

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u/Miserable-Release200 — 3 days ago

Could quantum wave collapse have something to do with the observer's frequency? Trying to figure out if this idea makes any sense.

Hey. I'm an engineering student, not a physicist, so I'm probably about to say something wrong. But I've been thinking about this for a while and I want to know if it holds up or if I'm missing something obvious.

Here's the thing. I know perception isn't continuous — the brain samples the world in chunks, mostly in the 8 to 13 Hz range, and slower stuff (delta, 1 to 4 Hz) shows up in deep sleep and deep meditation. And I know the measurement problem in quantum mechanics is basically about why observing something makes it collapse into a definite state.

What I've been wondering is: what if those two things are connected in some way? Not in the mystical "consciousness creates reality" sense, but more mechanically. What if the collapse happens partly because the observer is sampling at their own rhythm, and that rhythm doesn't match whatever the underlying system is doing? And what if you could observe a quantum system while applying a low-frequency field (something in the delta range) and the collapse would look different?

I keep coming back to a rough analogy in my head. Like a one-way mirror. If the thing you're observing "sees" your observation because your rhythm sticks out, it collapses. But if your observation is hidden inside a frequency that matches the background, maybe it doesn't. I know that's not really how photons and electrons work, but the intuition won't leave me alone.

I already know the obvious problems. Decoherence explains most of the measurement problem without needing any of this. Low-frequency fields are everywhere and we don't see weird quantum effects because of them. The energy of a 1 Hz photon is basically nothing on the quantum scale. And people like Dean Radin have tried consciousness-quantum experiments and the results are messy.

So my actual questions are:

Is this idea already ruled out for a reason I'd know if I understood the physics better? Or is it just not something people have looked at because there's no reason to?

Has anyone actually run experiments where they applied oscillating fields at different frequencies during a quantum measurement to see if anything changes?

Is the whole "observer and observed being frequency-coupled" thing completely wrong, or does it map onto anything real?

I'm not trying to prove anything here. I'm trying to figure out if this is worth reading more about or if it's a dead end. Honest answers welcome, even harsh ones. I'd rather find out now than keep chasing something that doesn't work.

Thanks.

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u/Full-Train2129 — 3 days ago

More just a general question about the majorana one.

I’m trying to understand the majorana one chip more. I don’t know too much about quantum physics but they said we needed like 1 million qbits before we could start making custom materials??? That’s what I’ve heard. I’m having trouble grasping the whole story.

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u/stu_notsoup — 4 days ago
▲ 128 r/QuantumPhysics+26 crossposts

Says in India, Art Deco is architecture of the common man (as compared to displays of power in America) vs. neo-Gothic/neo-Classical structures

Also says that the rise of gated communities, the lack of integration with Navi Mumbai is hurting Mumbai's growth. Explains why it's impossible for India to create it's own national architectural style

Thoughts?

u/Odd_Wolverine_4037 — 8 days ago
▲ 2 r/QuantumPhysics+2 crossposts

Which is it really, though? Is Quantum the weird one, really?

Quantum computing isn’t weird. Classical computing is weird because it forces the universe into a tiny, rigid, binary box — and then calls everything outside that box “weird.” I saw another post here about classical computing distraught and in tears at the idea that quantum computing is weird, but I disagree with the idea. Because if the fact is that our universe exists because of quantum computing, then "classical" computing is the one that's weird, because it's either the defect, the starting point, or some cheap imitation that we built to understand the universe. I'm not getting any valuable answer from any AI, so someone give me something good.

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u/Max-Ghoul — 6 days ago

Are there any viable applications of quantum mechanics in the stock market?

Recently I read this book: The Physics of Wall Street: A Brief History of Predicting the Unpredictable. Hence, I became interested in quantum applications in the stock market. From a theoretical standpoint, it makes sense because both QM and the stock market are probabilistic in nature. In QM, you can get the probability of a particle being in a certain area and in the stock market you can also predict the probability of a stock going up or down. Either way it is impossible to come to a definitive conclusion.

I have a background in optics/photonics and in QM as well as an interest in finance, so this topic naturally became something I wanted to pursue for my research project. But after thinking about it more it just seems very buzz wordy and not something traditionally done. Additionally, the stock market produces very noisy data, and it just seems impossible to do a research project around that chaos. I'm overall just very confused about if/how to make a project around this and what applications even are there. I need to have a physical apparatus for my project anyways so I may just scrap this idea

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u/Klutzy_Jicama_8047 — 7 days ago
▲ 9 r/QuantumPhysics+2 crossposts

Spin-Orbit Coupling Explained: Electron Moments, the Nucleus & Spintronics Applications

Most physics courses introduce spin and orbital motion as separate ideas — but they're not. They constantly talk to each other inside every atom, and that "conversation" is what makes platinum useful in hard drives and what might power the memory chips of the future.

This note breaks down spin-orbit coupling from the ground up — from Thomson's cathode-ray discovery to the Stern-Gerlach experiment, Schiff's 1955 formula, and modern spintronic effects such as the spin Hall effect, DMI, and MRAM.

Written from the electron's perspective, which makes it surprisingly fun to read.

https://notesforphysics.com/spin-orbit-coupling-electron-moments/

notesforphysics.com
u/notesforphysics — 7 days ago

Why Can Quantum Angular Momentum Have Half-Integer Values?: A Derivation via Ladder Operators

Angular momentum and spin typically appear in the middle of undergraduate quantum mechanics texts, which can be difficult to comprehend without a foundation in linear algebra. This post provides detailed algebraic derivations that are often omitted in standard texts. I hope this helps.

u/TROSE9025 — 6 days ago

Quantum mechanics without any math

I have been working on a web site that introduces quantum mechanics to curious readers who aren't ready to get into the weeds and do the math. The goal is to introduce all the core concepts and make them as intuitive as possible. Hopefully this is useful for anyone starting to look at quantum mechanics and wants to know what it is all about.
https://timeforsanity.com/qm/

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u/NH-Science-Guy — 8 days ago
▲ 1 r/QuantumPhysics+2 crossposts

Does Oaknin's relational/gauge model (arXiv:2403.07935) genuinely evade Bell's Theorem, or is it just the measurement-dependence loophole?

Hey everyone, I've been digging into David Oaknin's paper "Accounting for gauge symmetries in CHSH experiments" (arXiv:2403.07935) and wanted to get a quick sanity check from the quantum info / black-box foundations crowd here.

In his model, he uses non-linear coordinate transformations (Gamma-maps) to ensure that the individual marginals are strictly setting-independent and non-signaling. However, the catch is that it forces the joint distribution of the hidden variables to depend explicitly on the relative detector angle, theta.

Oaknin argues this isn't a violation of locality or measurement independence because the hidden variables are purely relational (gauge-dependent) rather than absolute, which creates a geometric holonomy that breaks Counterfactual Definiteness instead.

From a quantum information / black-box perspective, how is this generally viewed by the community? Is this considered a genuine geometric bypass of Bell's theorem, or does having a joint distribution that depends on theta just relegate the whole model to a standard measurement-dependence / superdeterminism loophole?

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u/RecognitionAfter3485 — 9 days ago
▲ 6 r/QuantumPhysics+2 crossposts

Number of microstate for an N-Particle system is not equal to Number of microstate for 1 Particle system to the power N. Here's why !!

A small misconception I had while studying Statistical Mechanics:

Can we always say:

Number of microstates of N particles = (Number of microstates of 1 particle)^N ?

At first it feels natural because if one particle has Ω₁ possible states, N independent particles should simply give (Ω₁)ᴺ.

But in the microcanonical ensemble, the system has a fixed total energy. The N particles are not represented by N separate momentum spheres. Instead, the entire system forms one hypersphere in the full phase space.

For one particle in D dimensions → momentum space is D-dimensional.

For N particles → momentum space becomes DN-dimensional.

Which is basically dof (degrees of freedom dimensional)

That changes the geometry. The Gamma function term changes from:

[ Γ(D/2 + 1) ]ᴺ

to:

Γ(DN/2 + 1)

and these two are not the same.

So the N-particle microstate is not obtained by blindly raising the one-particle answer to the power N. You have to count states in the complete phase space of the system.

For identical particles, we also divide by N! to remove the overcounting due to particle exchange (Gibbs correction).

A small detail mathematically, but a very important idea physically. Let me know if any error.

u/dwivedikaustuv — 13 days ago

What is the best language to run superposition formula executions?

I'm a neural physicist and need a programming language that can handle super positions. Python is very fast but, lacks the ability to run simultaneous operations which means, no superpositions. C language seems like the best option but, it's very heavy.

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u/InternalAd1788 — 13 days ago