Currently, there are several ways to build a quantum computer and its important component, the qubits, and companies are somehow trying out the error to come up with a better formula than their competitors. Until now, however, the main blocks for such quantum operations have usually been electrical circuits in the form of superconducting intensifiers or light in the form of photons or atoms in the form of ion chains. For example, Google and IBM use superconducting circuits that cool to near zero.
In the meantime, Honeywell produces the telecommunication design of qubits from electrically charged electrone atoms. Intel qubits are single electrons distinguished by their mechanical quantum mechanical properties, and Xanadu uses photons for its qubits, and its quantum processors operate at room temperature.
Now, it is said that a group of physicists have been able to take a new approach to building these gigantic and bizarre computers, which can be described as a turning point in quantum superiority. Using the quantum properties of compact light sources, researchers expect to pave the way for faster and easier construction of quantum computing systems and to address many of the problems of other approaches.
The team is confident that their research can lead to the development of large-scale quantum computing systems that are largely maintenance-free. In general, the light-based approach has many inherent advantages over traditional quantum computing architectures, which can be based on a number of approaches, such as distorted ions, silicon quantum dots, and topological superconductors.
However, all of these approaches are somewhat physically limited and require the use of electronic circuits that lead to ohmic heating. Ohmic heating is the process by which the passage of an electric current in a conductor produces heat. In addition, photonics provide tremendous latency improvements due to the speed of data moving.
Simply put, photonic-based quantum computing uses the quantum properties of light. An important point about the quantum properties of light is the concept of “compression”. The more compact the light source, the more quantum behavior and properties it will have. In the past, a minimum compression level of more than 65% was thought to be sufficient to access quantum properties.
Nevertheless, the researchers achieved 75% light intensity in their experiments. In practice, their quantum system opens the frequency band of more than 6 terahertz and uses the photonic benefits of quantum computing without reducing the available bandwidth to unused surfaces. Therefore, researchers expect that their photonic-based quantum design will make it easier to build quantum computers.
This approach eliminates the need for odd temperature controls (absolute zero), which are commonly needed to maintain quantum coherence in other systems. Meanwhile, scaling also becomes easier; Because there is no need to increase the number of qubits by joining several smaller and more coherent quantum computing units. Instead, the number of qubits and thus the performance of the system can be increased by continuously dividing the light into time segments and encrypting different information in each of these segments.
The team says that this method allows them to easily increase the number of qubits in the time axis. Together, these elements reduce the raw materials needed to build a quantum computer, eliminating the complexity of maintaining quantum connections and coherence between small and multiple quantum computing units.
At present, it seems that the focus of researchers is entirely on building a photon-based quantum computer. It is claimed that their design could lead to the use of millions of qubits, and if true, would be a revolution in the construction of quantum computers, which would eventually lead to the prosperity of many industries.