Breakthrough in Quantum Computing Market: Researchers Develop a Technique that can Reduce Decoherence within Superconducting Circuits, thereby benefiting Applications of Quantum Computing
Superconducting quantum circuits have been in the limelight for some time now and have seen interest from numerous industry giants like IBM and Google. However, their widespread application has been challenging due to 'decoherence.' The phenomenon causes information to be lost. It happens primarily because of interactions that occur between the silicon chip and the superconducting circuit. Further, the material imperfections that appear during the fabrication are also a reason for decoherence.
Now a research team has put in efforts and discovered how to predict and address imperfections in materials. They state that their approach will benefit promising technologies within quantum computing. The development might help boost the Quantum Computing Market as the researchers created treatments and optimized fabrication protocols for standard methods needed to build superconducting circuits on silicon chips.
Researchers successfully identified the imperfections that occur during fabrication result in reducing the effectiveness of the circuit. Thus, they applied a method referred to as THz SNOM (Terahertz Scanning Near-Field Optical Microscopy). The method involves an atomic force microscope merged with a THz detector and light source. This helps to achieve a combination of high spatial as well as local spectroscopic measurements.
The unique technique facilitates probing at a nanoscale instead of macroscale as it focuses light onto a metallic tip. This results in receiving new access to understand the location of imperfections. Once identified, researchers can quickly reduce decoherence, thereby decreasing losses within superconducting quantum devices. In addition, the team also found that standard fabrication recipes are the reason imperfections are usually introduced into silicon chips, a primary reason for decoherence to occur.
Furthermore, the present study also demonstrates that surface treatments are a vital way to reduce imperfections which subsequently minimize the loss in the superconducting quantum circuits. The approach is impressive as it helped the team to pinpoint where flaws were introduced into the process. Then they can use optimize fabrication protocol to address the issue.
The best characteristic of the method is that it facilitates probing in one device multiple times, unlike current methods that usually need the device to be cut up before it can be examined. 'As presented in the research, the team's findings are highly relevant to providing a path towards enhanced superconducting devices and might even become the foundation for better quantum computing applications.
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