Photonic computers and quantum dots.

"Tailored terahertz radiation excites the antiferromagnetic material, driving its collective atomic vibrations. During such coherent motion of atoms, the interatomic distances are modulated in a specific manner, altering magnetic interactions and inducing net magnetization. Credit: Sampson Wilcox, Research Laboratory of Electronics at MIT" (ScitechDaily, Terahertz Light Unlocks a New Era in Smarter, Faster Memory Chips)

The Xanadu Corporation introduced the first scalable photonic computer. 

The Canadian quantum computer company Xanadu introduced the first scalable quantum computer. That means the computer looks like a normal computer to the user. However, data handling happens using photonic systems. In that system, photons, or light, replace electricity. Prisms, mirrors, and lasers are replacing the electric components—maybe quite soon. Photonic computers replace electric computers. 

Photonic computers can be the gate between electric and quantum computers. The photonic systems can turn photonic information into quantum form. The time crystals can be a suitable tool for the quantum computer. Their shape is like a pulley. That makes it possible to touch photons and then transport information in them. Time crystals are only one new solution in the rocky road of quantum computing. 

Another thing is that terahertz radiation can be a tool for next-generation quantum computers. Terahertz radiation allows the system to transmit information very fast through the air. Terahertz transmitters can send thin waves into the objects like electrons. Terahertz radiation can transport information into qubits. If we could see those layers or states in the qubit. We could describe that the qubit looks like Jupiter which has a spin axle on its equator. The stripes on it would be like sideways. And each stripe includes information. 

"A new study highlights how adding the right number of connections can keep quantum networks stable, using fewer resources than previously thought necessary, suggesting a scalable approach to quantum network design. Credit: SciTechDaily.com" (ScitechDaily, Physicists Found the Magic Number to Save Quantum Networks)

Terahertz radiation is the tool that can make quantum computers more advanced. But their problem is still the error correction. The error correction requires error detection. And the problem with quantum computers is that they put data in physical particles. If those particles touch something that can cause data errors. 

New quantum microscopes can help to observe the qubits. Those quantum microscopes see the quantum entanglement. That allows the system to detect the behavior of the qubits and quantum systems. The most important thing that quantum computers must know is when quantum entanglement's energy level turns the same on both sides of the entanglement. When that happens the quantum entanglement is gone. In normal cases, quantum systems communicate with each other using quantum dots. 

The problem is that sooner or later those quantum dots disappear. The quantum entanglement is made between those quantum dots. And when transmitting quantum dot transmits information. It turns weaker. The quantum dot is like the tape. When information once loaded into it it is impossible to fix that data. If there is an error in the qubit fixing. That requires that the system makes a new qubit. 

Because quantum dots disappear it makes the quantum networks secure. In the same way, they make the quantum networks hard to control. The answer is to increase the number of those quantum dots. But if the system makes too many quantum dots. It makes them hard to control. But there is still a problem with losing quantum dots. The quantum microscope can see things like when those quantum dots start to disappear. 

https://interestingengineering.com/innovation/worlds-first-scalable-photonic-quantum-computer

https://scitechdaily.com/physicists-found-the-magic-number-to-save-quantum-networks/

https://scitechdaily.com/record-breaking-source-for-single-photons-developed-that-can-produce-billions-of-quantum-particles-per-second/

https://scitechdaily.com/revolutionary-microscopy-unlocks-the-secrets-of-quantum-entanglement/

https://scitechdaily.com/terahertz-light-unlocks-a-new-era-in-smarter-faster-memory-chips/

https://scitechdaily.com/time-crystals-may-be-the-next-major-leap-in-quantum-network-research/