Time crystals can use in quantum computers as quantum USB. But they can offer endless energy sources. 

Time crystals are the next impressive tool in quantum computing. A time crystal is the fifth state to matter. They are the quantum structures where rows of ions or some other particles are wobbling in the quantum field. And in time crystal, energy is surrounding between particle row and the field, that surrounds those atoms. There is possible to make the time crystal by using the electrons or some other subatomic particles. 

The time crystals are the quantum version of the perpetual motion machine. And that thing is making them a very powerful tool. The time crystals can use to make very accurate clocks. The thing that limits the use of time crystals is, of course, the extremely low temperature that this thing requires for stabilizing the quantum entirety. 

Time crystals are quantum-size perpetual motion machines. They can use for very accurate time measurement. Or produce energy to low-temperature microchips. I don't know how long the movement can continue in time crystals. But that wobbling can continue for a very long time. Because even the weakest outcoming radiation has the effect of the time crystals. 

The perpetual motion machine is the model of a self-sustaining system. In that system, energy is surrounding the system (or machine). If there is no loss of energy, that thing makes that movement of the system continues forever. So if there is some outcoming energy source that thing will raise the energy level in the system until the system will release its energy somewhere. 

And the reason why a perpetual motion machine is impossible to make in our scale universe is the friction. But in the quantum world is possible to make the ions or some other subatomic particles wobble inside a common quantum field. The quantum-size perpetual motion machines are offering many other things than just the ability to create the quantum-USB-stick for storing qubits. 

Time crystals offer the possibility of creating a power source for long-distance or even interstellar probes. The idea is that when the quantum system where is self-sustaining movement will conduct energy. That outcoming energy is increasing the energy in that system. So the time crystals can use to collect energy from low-power energy fields. 

Or maybe they can turn the kinetic energy of the probe into electricity. The same way the time crystals can use for the energy source in the extremely small microelectronics. That is operating at extremely low temperatures. But those things are the futuristic visions of the use of time crystals. 

https://scitechdaily.com/stanford-and-google-team-up-to-create-time-crystals-with-quantum-computers/

https://en.wikipedia.org/wiki/Time_crystal

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