Quantum entanglement Definition and 299 Threads

I apologise in advance for my rather minimal knowledge of physics. Please assume that anything I write below is just my current understanding, and may very well be incorrect... Elementary particles decay into other elementary particles. When a a subatomic particle decays into a pair of other...

Seriously, a 5 year old asked me whether entanglement information survives/escapes a black hole. Specifically, he asked me (in only slight paraphrase) whether if one of the particles (headed in different directions) fall into black holes on either end, does the other one know it?

I learned the principles of quantum physics and the basic mathematical techniques quite some time ago. The only discussion of quantum entanglement concerned the EPR paper. There have been many advances in the field since that time, including the somewhat mysterious phenomenon of quantum...

Disclaimer, I'm no scientists, and i know enough to get my self into trouble, however Every time i hear about quantum or quantum computers or such, and its experimental data, its never proved in my mind that the particles where ever in superposition (if that's the tight terminology). every now...

In its broadest sense, quantum entanglement means that two 'particles' separated by distance, and moving away from one another, behave as if they are next to one another. In a mental experiment, you can imagine what the world might look like to these two particles as they zoom away from one...

What is Quantum Entanglement, and what does it do? I attempted at learning via online articles.

Quantum entanglement is a concept that has captured my imagination and has intrigued me very much in the past few years in which I've become interested in quantum physics. Immediately upon reading about it for the first time, I realized that quantum entanglement could be applied in a new...

Pardon my wording as I do not have a solid background in physics, while pondering The effects of observation on a particle changing its state upon observation, and the "theory" that the particle in question went back in time to change its state, My idea or hypothesis on this was that it might...

If I observe two particles that are entangled enter two different black holes and wait, will there eventually be 2 entangled photons radiating out of the black holes or do the black holes take possession of the entanglement as the 2 particles enter their respective black holes and said black...

... for a dissertation in the final year of a physics degree? Over the summer we will be presented with a number of projects for our final year, we have been told that we may be allowed to choose our own if it is suitable. I have a genuine interest in quantum entanglement and was wondering if...

I am a law student and have no training whatsoever with regard to quantum mechanics, and I have been struggling to wrap my head around quantum entanglement in particular. I've been trying to find videos which would explain exactly what would occur in the following scenario, which I believe is...

I have a question on the tension between special relativity and quantum mechanics, so please correct the category if this question is in the wrong location. I was looking at the write-up of an experiment: “Causality, relativity and quantum correlation experiments with moving reference frames”...

I recently heard one theory of parallel universes simply being extra dimensions (one thing string theory requires I believe). Well I also happened to be thinking about quantum entanglement. It is still unknown how this phenomenon works right? Well I had this idea that I suppose can't be...

Hi there, Is it possible to accelerate one of a pair of photons (while under quantum entanglement) close to the speed of light, and communicate information from the future? For example, two pairs of entangled photons with pre-determined states (using projection measurement) have one of...

I've been reading about quantum entanglement, and I read in many websites that it plays a very important role on quantum computers. I tried to find why, but the only information I got was that quantum entanglement allowed us to see the value of a qubit without interacting directly with it (and...

Hi. Imagine a system of two particles, A and B, where they are entangled. I've been studying a little bit of quantum entanglement and I understand how measurement of one property of a particle A leads us to find indirectly the value of that property to the particle B. My question is: if I...

Hello Everyone. I will be honest with you guys, I dropped out of school at 13 years old and I have no formal qualifications and certainly know very little about Quantum Physics... However I like to "THINK" and this has what has brought me here. What I am about to ask could very easily...

Quantum Entanglement... for the layman? ! This may be a tall order, but can anyone explain the basics of quantum entanglement (theory?) in words that a relative layman might have a chance of understanding. The reason I ask is that although I have a only very basic knowledge of quantum...

So let me get this straight once and for all (can that even be possible in physics? lol). In quantum entanglement, does information actually get transferred? Most of the things I've read says something along the line that it cannot be deciphered. The information is sent, except there is no...

LiveScience Quantum Computing Breakthrough QE for short. Please read that article. I need someone to set me straight here... Is QE a real thing, as in it's no longer an idea but is 100% a real thing. If two particles become entangled then whatever happens to one particle instantly...

although the anthropic landscape looks appealing, I am not big fan of the string theory, due to untestable extra dimensions. In isolation, without sensory information(experiments) the humans(theoretical physicists) start to hallucinate(String theory). But what if higher dimensions can be probed...

if there are two entangled particles one of them is flying 80% the speed of light , one of them is on Earth for instance if we measure the one on Earth , would it the entanglement affect the other particle after sometime * due to time slowing down for speeding up particle * or does it happen...

Hello there! I´ve tried searching the internet but seems to be in need of a heavy book for this answer. I stumbled upon this forum and decided I would love to ask some Experts here :-) Basically what attributes are quantum entangled? I know that spin is, but is fx kinetic energy? Are...

i do not posses deep knowledge of Quantum physics nor regular physics for that mater novice at best. so i have a idea say you have 2 entangled particles separated by say 5 light years by the idea when you observe them you will get result X and the opposite on the second particle so Y. soo if you...

I have just joined this forum as I am curious to discover from experts if my idea is physically possible. Once you pass the event horizon of a black hole nothing can escape as the space time "fabric" is moving into the black hole at equal to or greater than the speed of light. But I hear from...

I'm not all that learned in Quantum Physics, but I read about this, and it piqued my interest. I read that the minimum speed that's been found for Quantum Entanglement, according to research done by Prof. Juan Yin and colleagues at the USTC in Shanghai, is 10 000c. This doesn't rule out the...

Quantum entanglement (information transmitted !) Hello, In all information I see about quantum entanglement, it's stated that nothing travels faster than light, because no information is transmitted. I believe that in in the experiments done, you can't detect the exact quantum state of a...

We have two concepts - discrete and continuous While the concept of discrete tends to be associated with quantum mechanics; Is quantum entanglement a resource that hints at continuity even when (the entangled particles are) separated in time-space?

Hello. I have a question suppose we have two entangled electrons , now we take them a sufficiently large distance away from each other so that the EM (light) wave would have to travel a certain distance/time.When one electron is measured at one place and the other at the other place they botch...

This question may have been posted before, but I didn't have much luck finding it. We can't know the momentum and position of a particle at the same time, but if one were to entangle two particles (I.e. photons), wouldn't it be possible to measure one quality on each and thus deduce both the...

I am new to this forum, and posting in forums in general, so this is a slightly strange experience for me. I would like to kindly and respectfully request everyone's cooperation, and if those posting would be respectful in their answers. I was recently reading through an article on an...

Superluminal signals using quantum entanglement Please consider this thought experiment. Would this provide a means for communicating faster than light or is there an error somewhere in it? SUMMARY: Person B can instantly know whether or not Person A did measurements on his particles by...

We know that single particle interference is effected by certain kinds of obstruction. Is there any effect of Obstruction when placed between two entangled particles? Single particle interference and quantum entanglement may not have that much in common, however just wanted to check.

So I watched this video talking about now slices, and how it seems that across vast distances of space, movement can affect what is actually the now of places far away. https://www.youtube.com/watch?v= This seems to be in direct conflict with what I've heard about quantum entanglement...

I don't have a good grasp of "spin along axis" topic, so pardon my dumb questions: 1. Does a photon/electron have a different spin across each of the 3 axis? i understand that the spin of an electron/photon is not the same as that of, say, a ball 2. Gravity can distort time-space (and hence...

I came across this phenomenon during my undergrad quantum mechanics studies, but haven't delved into it very much. I'm interested to know though, if theory for quantum entanglement is complete?

Citing a recent post from Dr. Chinese, it seems like quantum entanglement experiments are showing something beyond the current standard model. https://www.physicsforums.com/showthread.php?t=637454 If particles can be entangled to other particles that only existed in the past, it seems that it...

Consider me physics illiterate since my last class was advanced placement physics in high school (over 20 years ago). I am trying to understand what the title says, How does quantum entanglement, string theory, and the BB fit together? Skipping to the meat of the subject, everything revolves...

Because the universe started as a point of almost infinite density, wouldn't that mean that every particle in the universe interacted with one another while in that state, crammed together, thereby causing all the particles in the universe to be entangled, including those particles that created...

This looks more like a relativity question, so let's post it here. I try to keep it short. Alice and Bob approach each other, synchronize their clocks when they meet, then drift away from each other with relative speed 0.8c. No acceleration involved here. There is an entangled particle, Alice...

Okay, I have the following scenerio (attached picture). The inputs for path b and c are two photons. both photons aren't entangled with each other - they're entangled to other photons. Before the beam splitter there is a wave plate that converts the photon into the 45/135 basis. So what we...

I am not a physicist and really do not have any formulas or basis, it is merely a concept that occurred to me and I was curious if it had been thought of or if it was even possible? Conceptual question: Could quantum entanglement be used in conjunction with a photon, to be able to move...

Is quantum entanglement unaffected by fields/forces? [SIZE="1"]Forces = the, yet known, four fundamental forces i.e. Is quantum entanglement "friction-less"? Assumption: Anything that is effected by fields and forces can, at the most, interact/move at the speed of light. Quantum entanglement...

How stable/fragile is Quantum Entanglement? with respect to time, space and various events.Space - We know that experiments have validated QE working across say 150 kms and it is generally believed that they can work across very large distances. Does gravity effect QE over large distances? Time...

Clearly, I am a newb at this. However: I was reading a bit on qubits and quantum entanglement and -- though I know that QM has no analog to classical mechanics -- the general concept seems to be: two particles interact and become quantum entangled, and then have non-local ties to each other. To...

how does/would LHV (local hidden variables) theory explain the phenomena of: 1. quantum entanglement swapping (where Alice and Bob never meet, and Charlie/Victor is still able to entangle their photons) 2. two-photon interference without the photons ever meeting at the same time-space/place

Good afternoon. I am wondering if quantum entanglement could be created between two thermodynamically isolated Bose-Einstein condensates of the same atom produced at the same time in close proximity. Due to the similarity of the systems' mathematics regarding their quantum states (wave...

Hi, I've been reading some stuff about quantum entanglement and I stumbled upon an article talking about a delayed choice quantum eraser experiment using parametric down conversion. I was wondering if it was possible to communicate a signal through to the other side faster than light...

When I read about entanglement it is described as the singlet state two particles (or eventually even molecules) are in after interaction with each others or due to a decay. Put in that way it does not sound difficult to do. Just let two particles scatter with each others and we should have an...

Physicist say "Quantum Entanglement is when you place 2 electrons together. They Vibrate in Unison. When you take them across the galaxy if you "jiggle" one, The other also "jiggles" Physicist say" however it does not transfer any meaningful information"This is a EVIL way of speaking. Why...