Photo of the experimental setup to couple MWs to N- đâ˘s using grape dimers. A stripped optical fiber with N- đ spins, cantilevered from a rod, lies between two grapes. The grapes were positioned on a platform with a vertical straight copper wire, equidistant from each grape. Credit: Fawaz, Nair, Volz Scientists at Macquarie University have discovered a novel way to enhance quantum sensor performance using ordinary grapes. By utilizing the water content and specific size of grapes, they created strong magnetic field hotspots that improve the efficiency of microwave-based quantum sensing. Supermarket Grapes and Quantum Sensors Researchers at Macquarie...