Current quantum computers are generally impractical for widespread use because they require massive cooling systems to reach temperatures near absolute zero. To solve this problem, scientists at Stanford University have created a new nanoscale optical device that functions effectively at room temperature. The technology relies on a thin layer of a material called molybdenum diselenide, which is placed on top of a silicon chip. Molybdenum diselenide is a type of crystal that is particularly effective at controlling how light behaves. The silicon chip underneath has a specific pattern carved into it that is too small to be seen with the naked eye. This nanopattern forces photons to spin in a specific corkscrew shape.
Stabilizing the flow of data
This spinning effect, often called twisted light, is crucial for the operation of the device. The spinning photons interact with electrons. This interaction creates an entangled link between the particles, which allows for the creation of qubits. Typically, heat destroys this delicate state in a process called decoherence, causing the data to be lost.
However, this new combination of materials stabilizes the connection between the electron and the photon, preventing data loss even without freezing temperatures. This breakthrough implies that quantum technology could one day be small and cheap enough to fit into ordinary electronics.
“If we can do that, maybe someday we could do quantum computing in a cell phone,” notes a Stanford news release.
By removing the need for expensive cooling infrastructure, this innovation could reshape fields such as cryptography and artificial intelligence. The scientists are now focused on refining the design and finding ways to integrate it into existing systems. This will require the development of new components, such as better light detectors, to support the new chip.
The scientists have described the methods and results of this study in a paper published in Nature Communications.