Astronomers Use Rare Ultra-Magnetic Star to Crack a Quantum Mystery
Astronomers have potentially confirmed the 90-year-old theory of vacuum birefringence by observing a magnetar. This quantum effect suggests that empty space can alter the behavior of light due to the presence of virtual particles.
Why it matters
Confirming this quantum effect provides new insights into the fundamental nature of the universe and validates long-standing theories in quantum physics.
The principle of vacuum birefringence, a quantum effect first predicted almost 90 years ago by Werner Heisenberg, states that empty space can alter the behavior of light. As Heisenberg theorized, even a perfect vacuum should be teeming with "virtual particles" that rapidly pop in and out of existence. Despite everything scientists have learned from nuclear research since the 1930s and decades of experiments with particle accelerators, the effect remained unconfirmed until now.
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