Researchers at Macquarie University have uncovered a remarkable method to enhance quantum sensor performance using common supermarket grapes. Their study, published on December 20, 2024, in Physical Review Applied, illustrates how pairs of grapes generate concentrated magnetic field hotspots when exposed to microwaves, which are essential for improving the efficiency of quantum sensing technologies. The research pivoted from observing grapes creating plasma in microwaves to exploring their magnetic field effects, which are vital for quantum applications.
The team utilized nitrogen-vacancy centers in nano-diamonds, which act as optical quantum sensors, and positioned their setup between two precisely sized grapes. When exposed to a green laser, the quantum sensors emitted a red glow that indicated the strength of the microwave field, revealing that the presence of grapes doubled the magnetic field’s strength.
This breakthrough opens avenues for developing smaller, more cost-effective quantum devices, as the researchers aim to create materials that leverage water’s properties more effectively than traditional sapphire. The study suggests that exploiting the unique features of grapes may lead to more efficient quantum sensors, marking an innovative leap in quantum technology.
