Abstract OFweek Laser News: The researchers showed how to control the "electron spin" of nanodiamonds when electrons and lasers are suspended in a vacuum tube, which will help to find applications in quantum information processing, sensors, etc. Helping to study the physical basis of quantum mechanics...
The researchers showed how to control the "electron spin" of nanodiamonds when electrons and lasers are suspended in a vacuum tube, which will help to find applications in quantum information processing, sensors, etc., and contribute to quantum mechanics. Physical basic research. Electrons can be thought of as having two different spin states, "up" or "down", where researchers can detect and control electron spin resonances or achieve changes from one state to another.
“We have shown how nano-diamonds that float in vacuum or in the presence of different gases, how to make their spintronics constantly flip,†said Li Tongzang, who is at the Department of Physics and Astronomy, Electrical and Computer Engineering at Purdue University. An assistant professor.
The results of the study were published in the recent issue of Nature Communications, and a detailed description of the study was published in this research paper. Electron spin resonances have different behaviors in the presence of helium and oxygen gases, which means that the technology can be used in a new type of sensor to detect and measure gases. Oxygen sensors are widely used to monitor vehicle exhaust and medical devices such as anesthesia monitoring and ventilator oxygen concentration. Nanosensors have a potential improvement over traditional sensors.
“Although more detailed research is needed to fully understand this phenomenon, our observations indicate that this will be a potential application for oxygen sensing,†Li said.
Suspended nanodiamonds can also be used in quantum information processing. Experimental techniques are used to explore the basic physical principles of quantum mechanics, as well as measurements of magnetic fields and gravitational fields. They can be applied to computer memory and search for Newton's law of universal gravitation using test methods. Deviation.
Nanodiamond suspension in vacuum can be precisely controlled and rigorous measurements of floating particles. Nanodiamonds are about 100 nanometers in diameter, about the size of a virus, and contain "nitrogen vacancy centers," which are key to potential applications. The center of the nitrogen vacancy is an atomic-scale defect in the diamond lattice, the nitrogen atom replaces the carbon atom, and creates a gap in an adjacent lattice. Researchers can use this feature to control electron spins.
One type of laser is used to "capture" and suspend particles in a vacuum chamber, and another laser is used to monitor electron spins. A millimeter-scale antenna provides microwaves to control and flip the electron spins, and a spectrometer detects these spin changes. A vacuum environment is needed to reduce the interference of air molecules.
Quantum computers exploit the phenomena described by quantum theory called "superposition" and "entanglement," and computers based on quantum physics can greatly increase the ability to process, store, and transmit information. One of the long-term goals of Purdue's research is to use this technique to test the famous Schrödinger's cat thought experiment, in which a cat may be dead and alive.
“We want to put a single nano-diamond in two different positions at the same time,†Li said.
The study was funded by the National Science Foundation.
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