there is a device called a "superconducting quantum interference device" (SQUID) that is widely known in the field of quantum physics. A SQUID is a highly sensitive magnetometer that exploits the quantum behavior of superconducting materials. It consists of one or more superconducting loops interrupted by one or two Josephson junctions.
A SQUID operates based on the principle of quantum interference. It can detect extremely small magnetic fields by exploiting the wave-like properties of quantum particles, such as electrons. The interference of quantum wavefunctions allows the SQUID to measure and quantify magnetic flux with remarkable precision, making it a valuable tool in various scientific and technological applications, including medical imaging, geophysics, and fundamental research in quantum physics.
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