Quantum experiments that subvert cognition can now affect the past. How can we understand the universe?

There is a folk saying that when things are uncertain, quantum mechanics and quantum mechanics are like peerless masters coming out of film and television dramas. He can fly over the eaves and walk on the wall, but this ability of quantum mechanics is so out of place in modern society. Have you ever seen anyone who can really fly? He can fly around in the sky. Have you ever seen anyone who can float on water? He can come and go freely on the water. These are impossible for modern people, just like when quantum mechanics first appeared, especially after the explanation of Copenhagen School, Einstein and other old physicists were greatly annoyed.

Einstein and many other scientists are constantly competing with Copenhagen School in its quantum explanations again and again. The most classic is the thinking experiment quantum entanglement proposed by Einstein and other three scientists, and Schrodinger's "Schrodinger's cat" thinking experiment that mocks quantum mechanics. Of course, the final result should be clear to everyone. Quantum mechanics has stood firm again and again and developed into a physical pillar that keeps pace with relativity.

Today, I'm going to talk about this quantum mechanics double-slit interference delay experiment that subverts the law of causality. The key word is "procrastination"

1. Firstly, the double-slit interference experiment of light is introduced.

The experiment of light interference has been studied in high school physics class. This experiment was first completed by Thomas Young, who, as a doctor and physicist, set foot in a wide range of fields. The experimental process is also very simple. The light from the light source passes through two gaps, and then a series of light and dark stripes appear on the back screen. This experiment proves that interference fringes will appear when light waves say that light is electromagnetic wave.

This is easy to understand from a macro perspective, but when quantum mechanics comes in and looks at this problem from a micro perspective, you will find something strange for the first time. According to quantum mechanics, light can be regarded as a part of energy, that is, photons. So which gap does a single photon pass through?

This question is like thunder from the ground, because it is really difficult to answer. How does this photon choose which one to pass through? Photons are unconscious. When everyone was wondering, someone stood up. The Copenhagen School, led by Danish physicist Bohr, gave the answer to this question: photons passed through the left and right seams, but not through the left and right seams.

I can't imagine this problem! How do photons pass through two gaps at the same time? There are even more amazing things. When scientists verified which gap the observed photons passed through, they suddenly found that the interference fringes disappeared and the photons seemed to have consciousness. As soon as you observe me, I won't interfere! The Copenhagen School put forward their theory, the uncertainty principle, that their states will collapse when the quantum is observed.

2. Double-slit interference delay experiment

This experiment was put forward by Einstein and john wheeler at a seminar to commemorate the 0/00th anniversary of Einstein's birth/KLOC-. It is completed on the basis of double-slit interference experiment. The simple understanding is to let the electrons pass through the double slit screen, and then choose whether to pass through one slit or two slits.

According to quantum mechanics, the photons emitted by the laser light source come from two lines at the same time after passing through the P-half lens, and finally interfere with each other through two total mirrors. We add detectors outside the A and B mirrors, and then decide whether to add detectors at the end after determining that photons have passed through the A and B mirrors, which leads to a result: our current behavior or decision has led to changes in the past.

3. Conclusion

So is the universe we see now real? Or is it because our observation behavior has had an impact on the past that the universe is what we see now?

The delayed experiment in quantum mechanics seems to break the objective causality in the classical world. Although quantum mechanics refreshes our cognition again and again, it is still correct in theory and experiment.