Explain the Bose Einstein condensate

Gilberto 2022-09-11 07:15:08

In fact, laser is the most common Bose-Einstein condensate.

Elementary particles can be divided into two types, one is fermions that satisfy Pauli's exclusion principle.
Another type of boson that obeys Bose Einstein’s statistics.

For bosons, there is no distinction between them. You can’t distinguish them by placing numbers in different grids. Here’s how to distinguish the macroscopic world. It doesn't work. You can also understand that the essence of the so-called different particles is actually that

the spins of all bosons of the same particle are either 0 or an integer. The choice of fermions is a half-integer.

Therefore, the particle pair formed by an even number of fermions also constitutes a boson.

For bosons, they can be excited to exactly the same quantum state.

At this time, a large number of particle assemblies behave like a particle.

In this way, macroscopic objects (assuming that this macroscopic object is composed of bosons) can exhibit quantum effects that can be observed in the macroscopic world. This macroscopic object can be described by the wave function of a particle.
This is actually a bit similar to the macro electron described in Liu Cixin's ball lightning, but the actual electron is a fermion. But a large number of bosons should be macroquantums that can be assembled.

One of the most typical quantum effects is wave-particle duality. That is, a physical object is a wave and a particle at the same time.

Therefore, it is not surprising that people in the Bose-Eistan condensate shown in the movie can pass through obstacles. This is the same reason that light waves can pass through glass. It is not surprising that it can move at a high speed. Bose-Einstein condensed matter has superfluidity, and it does not have any resistance when it flows. It does not have any viscous force

. The depiction in the movie is still in line with scientific principles.

In fact, since it satisfies the wave-particle duality, it should have many magical properties, such as the wave function diverging when not being observed, and the wave function being collapsed when being observed. It should also satisfy the Heisenberg's uncertainty principle, which cannot determine its spatial position and momentum at the same time. The more accurate the positioning of its spatial position, the larger the range of its momentum change. It seems that the performance in this movie is not quite adequate.

The condensed people described in the movie are unaware. The hero destroys a certain switch to cause all condensed people to stop acting and disintegrate. Many viewers find it incomprehensible.

In fact, at the end of the movie, the reason should have been explained. The male lead walked to the inside and found that many devices contained the human nervous system (brain, spinal cord). The condensed matter itself is actually equivalent to a quantum, which can be described by a wave function. Then the setting in the film should establish quantum entanglement between human conscious activity and condensed matter. The self-observation of human consciousness can cause the wave function of condensed human to collapse, forming a stable entity, and moving under the domination of consciousness.

And the device destroyed by the hero in the film should be used to maintain the entanglement between the consciousness of the nervous system in those containers and the condensed human body. The quantum entanglement is destroyed. If the wave function diverges, a stable condensed state cannot be maintained. It presents a situation where the entire body collapses in the end.

The condensed person depicted in this sci-fi movie is actually more reliable than the macroelectron and quantum person in the big Liu ball lightning, and has a more scientific basis.

All in all, this is a fairly high-quality science fiction film, a rare science fiction film that conforms to scientific principles.

View more about Spectral reviews

Extended Reading

Spectral quotes

  • Sgt. Comstock: Oh, you haven't seen it. I've seen it.

    Capt. Sessions: You know I believe in God, John.

    Sgt. Comstock: This is the opposite of God.

  • Fran Madison: These are from real corpses.

    Clyne: Each one is made from a real person. They're alive? They're not alive. They're not dead. They're just trapped somewhere in between.