Could there be hidden alien civilizations in the universe?

The quantum brains

The most extreme vision of alien intelligence is the "quantum brains". The quantum brain is the of micro-size black holes in which the oscillating quantum field is acting like the membrane of the neuron. The X-ray beam from the poles of the black holes are acting as the axon. 

A similar structure can form by using ions or electrons. The idea of the quantum brain is that the quantum fields and other structures of ions, atomic and subatomic particles, or small black holes can form quantum-size structures. That is acting like neurons in human brains.

Before we are trying to think about this thing, we should describe the term "alien civilization". The best description for the alien civilization could be the entirety that is controlled by intelligence. That intelligence can be biological, or it can be artificial intelligence. Or it can be hybrid quantum computers and living neurons. And of course, parasitic aliens can be unseen. If the parasitic aliens are infecting only a certain part of the population. That means that they are hard to find. 

Those neurons can communicate with the quantum system by using nano-size microchips. The alien intelligence can be something that we might not even imagine. The form of the alien civilization could be a group of individuals like we are. Or it might be the group of brains under the glass dome. 

And in the last case, the brains are connected with the robot body that is working under remote control. In some of the most futuristic visions, alien intelligence could be the form of an intelligent city. 

The intelligent city would be the quantum computer and the neurons that are working as an entirety. So the alien would be like fungus that lives between the walls of those buildings that are the quantum computers. That quantum-biological entirety acts as the controller of the robots. 

The simplest example of the hidden alien civilization would be the alien group That lives underground cities below the surface of their home planet. And if some alien lives on underground bases that means that the planet is not their original home planet. In this case, the alien would come from another solar system. And the surface of the planet would be hostile for the alien race. This thing came to my mind. When I watched the movie about "Hidden alien civilizations" on YouTube.

The laser satellites can deliver energy to distant planets. 

The Nicoll-Dyson beams are the most extremely lasers we can imagine. The parabolic mirrors or large group of mirror satellites are collecting the entire energy of a star into one extremely powerful laser beam. That laser can use as a superweapon. Or it can deliver energy to the icy planets of red dwarfs. 

The mega lasers can use for both purposes energy supply and weapons. Those systems can destroy the dangerous asteroids and help the mining by cutting large asteroids into smaller parts that they can send to bases by using mass drivers.

If we are thinking about icy planets. If there is a lot of water ice. The hypothetical advanced alien civilization can create an oxygen-rich atmosphere very easily. They must just melt the ice and then break the water molecules by using electrolysis. And even the distant star can give enough energy for that thing. 

The system bases the power satellites that are orbiting the star of the solar system very close. And then the power satellites are delivering energy to the distant planet by using laser rays. This type of system can allow creating an atmosphere for distant planets even if they are covered by ice. And the energy supply for the stations is possible to make by using the same laser rays that are targeted to relay satellites. Then those relay satellites will transmit energy to the underground or underwater station by using high-power EM-radiation. 

In some visions in the huge oceans of the icy moons of Jupiter can be created the hovering, underwater station. Those stations can solve the problem of the weak gravitation of those icy moons. But the large icy planet with the magnetic field makes it possible to create an artificial atmosphere for that planet by using electrolysis. 

The energy supply for that station could handle by using laser satellites. In this vision, the laser satellites orbit the central star. And transmit energy to the entire solar system by using laser rays. That kind of system uses an extremely powerful laser. Can make the distant colonies possible. And maybe we are using those things after a couple of hundred years.  

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