Researchers at the California Institute of Technology (Caltech) have developed a device to
The conversion device isa set of flexible plates that vibrate under the action of sound waves at extremely high frequencies. When an electrical charge is placed on these plates, they become capable of interacting with electrical signals that carry quantum information. This allows this information to be transferred to a storage device for later use.
Various groups of researchers have already triedto create devices for converting electromagnetic quantum states into sound, the researchers note. As a rule, they used piezoelectrics for this, which can convert electrical energy into mechanical energy. But these materials have very high energy losses for electric and sound waves.
The solution created at Caltech does not depend onproperties of specific materials, making it compatible with known quantum devices based on microwaves. In a series of experiments, the researchers demonstrated that it can store quantum information from electrical circuits two orders of magnitude longer than other compact mechanical devices.
To understand how a sound wave can storeinformation, you can imagine a room with a very strong echo, the researchers explain. If you shout something to remember in such a room, for example, a shopping list, and close the door, the echo will “save” the information. If you look back into the room an hour later, you can hear your voice. This is a very big simplification, but in general the device works according to this principle.
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