Quantum Boost for Magnetic Induction Tomography

Abstract

M agnetic induction tomography is a contactless, noninvasive method for mapping the electrical and magnetic properties of a material. The technique is used in geophysical surveys and in the nondestructive testing of metallic objects, and it could have various uses in medical imaging, such as for monitoring brain activity. Now Eugene Polzik and his colleagues at the University of Copenhagen in Denmark show that quantum phenomena can increase the sensitivity of magnetic induction tomography [1]. The team’s demonstration is the latest example of quantum-enhanced sensing, which has previously been illustrated in the detection of gravitational waves, for example.