Entanglement-Enhanced Magnetic Induction Tomography

Magnetic induction tomography (MIT) is a sensing protocol exploring conductive objects via their response to radio-frequency magnetic fields. MIT is used in nondestructive testing ranging from geophysics to medical applications. Atomic magnetometers, employed as MIT sensors, allow for significant improvement of the MIT sensitivity and for exploring its quantum limits. Here, we propose and verify a quantum-enhanced version of the atomic MIT by combining it with conditional spin squeezing and stroboscopic backaction evasion. We use this quantum enhancement to demonstrate sensitivity beyond the standard quantum limits of one-dimensional quantum MIT detecting a conductive sample.

Automated summary

Magnetic induction tomography (MIT) is a protocol that uses radio-frequency magnetic fields to sense conductive objects. It has applications in nondestructive testing across various fields. By combining MIT with conditional spin squeezing and stroboscopic backaction evasion, we propose and verify a quantum-enhanced version of MIT using atomic magnetometers as sensors. This quantum enhancement allows for increased sensitivity beyond the standard quantum limits in detecting conductive samples in one-dimensional quantum MIT.