An experimental tour-de-force: Entanglement between glass bead and light

Key points

• Researchers have achieved a significant breakthrough by entangling a glass bead with light, a process that typically occurs only at quantum scales. Using optical tweezers and laser cooling, they suspended and cooled the bead within an optical cavity, creating a standing wave pattern that defined the interaction between the bead and the light field.
• By manipulating the laser frequency, they induced correlations between the bead's motion and the light fields, resulting in entanglement.
• This was measured by observing fluctuations in the leaking light.