Does the future affect the past in a quantum world?

In summary, the conversation discusses the concept of the future affecting the past in the quantum world. The speaker disagrees with this idea and explains that it is a misunderstanding of the relationship between knowledge and fact in the quantum world. They also mention the need for a reference in order to further discuss the topic.
  • #1
Froskersss
5
0
TL;DR Summary
I saw about this in a youtube video that the future affects the past in the quantum world.
Is this true?
 
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  • #2
Might be helpful if you gave us a link to the Youtube video you watched.
 
  • #3
It was in my native language hindi. So you won't understand it.
 
  • #4
He said that until we see something that thing is in wave form. But if we see something than that is in its normal form. So he gave the example by saying that if a gun fires a bullet through a slit. And you are on the other side of the slit and our eyes are closed and when the bullet reaches the other side of the slit you open your eyes. At that timeif you open your eyes. The wave of the bullet will go back to the moment when the gun fired. And this time the wave will be ready for you. When you open your eyes.
 
  • #5
Froskersss said:
I saw about this in a youtube video that the future affects the past in the quantum world.

Is this true?
No. That the future does not affect the past is called causality.

However, the future may reveal more information about the past, thus as when we learn about new archeological findings. But this doesn't conflict with causality - only our knowledge is affected.

Some people confuse knowledge and fact in the quantum world, and then conclude wrongly that there the future affects the past.
 
  • #6
Froskersss said:
It was in my native language hindi. So you won't understand it.

We can't discuss a reference we can't see.

The short answer to your question is no. Any longer discussion would need a reference we can actually use as a basis for discussion.

Thread closed.
 

1. How can the future affect the past in a quantum world?

In the quantum world, particles can exist in multiple states simultaneously and can also be entangled with each other. This means that the actions of one particle can affect the state of another particle, even if they are separated by great distances. This phenomenon is known as quantum entanglement and it allows for the future state of a particle to influence its past state.

2. Can the future change the past in a quantum world?

While the future can influence the past in a quantum world, it does not necessarily mean that the past can be changed. The past events have already occurred and their outcomes are fixed. However, the actions of particles in the present can influence the past state of particles, creating the illusion of the future changing the past.

3. Is this phenomenon unique to the quantum world?

No, the concept of the future affecting the past is not unique to the quantum world. In classical physics, this is known as the butterfly effect, where a small change in initial conditions can lead to drastically different outcomes in the future. However, in the quantum world, this phenomenon is more pronounced due to the nature of quantum mechanics.

4. How does this phenomenon impact our understanding of causality?

The idea of the future affecting the past challenges our traditional understanding of causality, which states that cause must always precede effect. In the quantum world, this is not always the case as the future state of a particle can influence its past state. This has led to debates and discussions among scientists about the true nature of causality in the quantum world.

5. Can we use this phenomenon to time travel?

While the concept of the future affecting the past may seem like time travel, it is not possible to use this phenomenon to physically travel through time. The outcomes of past events are fixed and cannot be changed, even with the influence of the future. Additionally, the effects of quantum entanglement are limited to the microscopic level and cannot be observed in larger objects, making time travel impossible.

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