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1answer
58 views

Could brain “entanglement” explain the double slit experiment? [on hold]

I know I should abandon trying to figure out quantum experiments and simply accept the various interpretations in the physics books but please bare with me and explain why my latest idea is wrong. I ...
0
votes
1answer
54 views

If I know in advance I'm getting an interference pattern, wouldn't I have time to remove the splitter so the which-path information would be know?

Check the image below, from this excellent explanation of the quantum delayed eraser. My question, and please forgive me if it is a naive one, is that first the photon reaches detector A, which tells ...
0
votes
1answer
42 views

Quantum Key Distribution via Modified Double Slit Experiment

Here's my reasoning: Setup 1: Take a traditional double slit experiment and turn on the photon source. Interference fringes should appear on a detector screen placed opposite the photon emitter, ...
0
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1answer
50 views

Quantum eraser without the quantum eraser

I've recently watched PBS SpaceTime's video about the quantum eraser. In it, Matt describes a kind of crystal that splits particles into pairs and entangles them. The entangled particles are then ...
0
votes
1answer
66 views

Holograms and Entanglement: Does recording an entangled signal in a hologram “observe” the entangled state?

Suppose I have two photons $A$ and $B$, which are entangled. As I have had it explained to me, entanglement works more or less as follows: I observe or measure $A$, and find $A=S_a$, where $S_a$ ...
3
votes
1answer
98 views

can entangled photons produce an interference pattern?

Suppose you have a laser that emits entangled photons in opposite directions towards a double-slit screen setup as shown below. The photons are entangled such that if a photon on the left travels ...
-3
votes
2answers
125 views

Using entanglement for communication based on the double slit experiment [duplicate]

When we perform a double slit experiment we receive interference pattern. when we measure in a specific slit the exact location of the photon (or electron) the interference pattern disappears and we ...
1
vote
1answer
58 views

Question about the shift of patterns in the Delayed Choice Quantum Eraser

In the double-slit Delayed Choice Quantum Eraser experiment by Scully with the installation in the figure below, as in Wikipedia, when a photon hits D4 or D3 the intricated photon hits D0 with a ...
1
vote
1answer
47 views

When does the exchange of energy take place in the Quantum Eraser experiment?

I found this PBS video regarding the delayed choice / quantum eraser experiment, which, like all the others I've seen, states that the interference pattern generated by the photons that pass through a ...
10
votes
2answers
4k views

What laser and BBO are needed to create entangled laser streams?

I have been reading about entangled particles, lasers, the two slit experiment, etc. I really know nothing from physics (i.e. equations, formulas, theory); so please respond accordingly. From my ...
0
votes
2answers
278 views

Entanglement in double slit experiment

Suppose we send 2 entangled photons through the 2 slit, does measuring the position of one of the photons affect the other particle's wave function or does the other particle still behave as a wave ?
6
votes
3answers
1k views

Delayed Choice Quantum Eraser: Am I missing something here?

Hello everyone, I actually have three questions: Am I missing an important detail in my understanding of how the delayed choice quantum eraser experiment is done? How does one account for what takes ...
0
votes
1answer
151 views

Double-slit experiment on cats makes inconsistency?

According to Wave-Particle Duality, in a normal double-slit experiment, the quantum object behaves as wave and many stripes are displayed on the screen. But if we measure which way the quantum object ...
0
votes
0answers
51 views

What happens if you put the BBO before the slits in a delayed choice quantum eraser experiment?

I've read that you can't detect an interference pattern at D0 in the image below without correlating with data from D1, D2, D3, and D4 due to the coherence being broken by the BBO crystal. Does this ...
0
votes
1answer
103 views

Does the Delayed Choice Quantum Eraser require the signal and idler photons to be entangled?

In everything I've read about the Delayed Choice Quantum Eraser Experiment, the descriptions talk about the BBO crystal splitting of the photon into two entangled parts. The signal photon of the pair ...
2
votes
2answers
438 views

Why does the interference patterns in delayed choice quantum eraser cancel out? Why/how does it have a phase shift?

Talking about this experiment https://en.wikipedia.org/wiki/Delayed_choice_quantum_eraser#The_experiment_of_Kim_et_al._.282000.29 I am assuming that anyone able to answer my question is already ...
3
votes
3answers
164 views

Reconciling Understanding of Quantum Entanglement and Superposition

My basic understanding is that Superposition is a property of particles that allow them to behave as if they are in multiple states simultaneously, e.g., interference patterns in double-slit ...
0
votes
1answer
65 views

In delayed choice experiment, entangled photon was detected at D0. Why a single entangled photon can have interference data?

I am new here and also physics. i tried to understand the experiment more. In the following youtube video. the demonstration indicated that an entangled photon arrived at D0 while its partner arrived ...
3
votes
1answer
591 views

Double slit experiment and entanglement [duplicate]

Just wondering, what would happen in this experiment. In the experiment you would first have two entangled particles. Then you fire one of the particles, lets say "Particle A", at a double slit ...
3
votes
2answers
309 views

What patterns could be observed in this quantum entanglement thought experiment?

Please see attached image below. The DEVICE is beaming two streams of entangled particle pairs (B1 and B2) in opposite directions (e.g.: Particle no. 1 (p1) goes left, Particle no. 2 (p2) goes right, ...
1
vote
0answers
48 views

Modified double slit experiment with single entangled particle [closed]

Say we use one of the entangled particle (A) for the experiment, if we measure the other particle (B) would particle (A) still be able to exhibit interference pattern since physically only the ...
3
votes
3answers
2k views

Entanglement and the double slit experiment

Is the double slit experiment an example of entanglement when it seems as if the photon is going through both slits? Or put another way, is it at this stage when we attempt measurement we see a photon ...
0
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0answers
77 views

Is there any quantum experiments or effects that you can do at home? [duplicate]

I have heard that you can do the double slit experiment, but is there any other experiments like particle entanglement or observer-induced state collapse?
-2
votes
1answer
770 views

Does this experiment on wave-particle duality and complementarity disprove quantum mechanics and prove the EPR viewpoint on it?

I recently read Photons act like they go through two paths, even when we know which they took, at Ars Technica, which reports on the paper Wave-particle dualism and complementarity unraveled by ...
8
votes
2answers
779 views

How do electrons interact if one of them had just exited the two slits of the double-slit experiment?

Consider the following experiment: a double-slit set-up for firing electrons one at a time. Let's now add a second electron (orange), which is fired parallel to the first one, but in the opposite ...
3
votes
1answer
609 views

Is this double “double slit experiment” involving entanglement possible?

The experiment goes as follows: Put a particle emitter (photon, electron etc.) between a pair of double slits. The emitter launches pairs of particles that are entangled in such a way that if one ...
-2
votes
2answers
693 views

Quantum entanglement? And quantum double slit

Does quantum entanglement consist only of 2 matter that are connected by each other? And what is the connection between the observer and the matter that is being fired? I'm not a physicist though ...
1
vote
0answers
208 views

Has the Double-Slit Quantum Eraser Experiment ever been tried on a large scale?

I was just reading about quantum entanglement and the example was the Double-Slit Quantum Eraser Experiment. Then this was used as a basis for saying that particles might be half a universe apart and ...
8
votes
4answers
2k views

Interference and which-path information

My understanding is that in a double-slit experiment, quantum interference disappears if which-path information is available. How is available defined? Consider the following experiment: SPDC is used ...