The empty void of space might actually be a seething ocean of activity
Physicists have long theorized that the vacuum is not a true void, but a turbulent landscape of flickering wormholes and black holes. Now, a rare type of neutron star may have provided the first evidence that even 'empty' space can physically alter the path of light.
For decades, the concept of 'spacetime foam' has suggested that on the smallest possible scales, the universe is a chaotic environment where black holes and wormholes constantly emerge and vanish. While many physicists believe this must be the case, direct evidence has remained elusive. However, a new investigation into magnetars—neutron stars with the most powerful magnetic fields in the universe—is offering a potential breakthrough in observing the quantum vacuum.
The phenomenon in question is known as vacuum birefringence, a quantum effect predicted nearly 90 years ago by Werner Heisenberg. His theory suggested that a perfect vacuum is never truly empty; instead, it is populated by 'virtual particles' that briefly appear and disappear. Under the influence of an extreme magnetic field, these particles can align with the field's direction, effectively changing how light travels by refracting it in a specific way.
An international research team, including Dr. Marcus Lower from Swinburne University of Technology, recently studied the magnetar 1E 1547.0-5408 using NASA's Imaging X-ray Polarimetry Explorer (IXPE). By observing how radio waves and X-rays from the star changed direction as it rotated, researchers found high levels of polarization tied to the star's magnetic field. Detecting this effect requires a magnetic field over 100 million times stronger than any created on Earth, making magnetars the ideal cosmic laboratories to confirm if the vacuum is truly as active as Heisenberg predicted.
Source: What If Space is NOT Empty?
