Scientists Created Something from Nothing. Literally.

Scientists have revealed that empty space is far from empty, as fleeting virtual particles can spring into existence and form real matter under extreme conditions, reshaping our understanding of the quantum vacuum and the origins of mass in the universe.

The seemingly empty expanses of space conceal a complex subatomic activity that challenges the traditional notion of a vacuum. Researchers have demonstrated that the quantum vacuum is not void but populated by transient subatomic entities known as virtual particles. Unlike conventional matter, these virtual particles exist only momentarily, appearing and disappearing almost instantly, and cannot be directly observed. Their presence is inferred through interactions with other particles, which affect measurable properties such as force interactions and particle masses. These ephemeral phenomena play a critical role in the fundamental forces of nature, including electromagnetism and the strong and weak nuclear interactions.

The unusual properties of virtual particles are explained by quantum mechanics. The energy-time uncertainty principle, a form of Heisenberg’s Uncertainty Principle, allows temporary fluctuations in energy that permit particle-antiparticle pairs to emerge briefly from the vacuum before annihilating each other. This process underpins the creation of virtual particles and illustrates the dynamic nature of what is traditionally considered empty space.

At the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory, physicist Zhoudunming Tu and his team conducted experiments to probe these virtual phenomena. By accelerating protons to velocities approaching the speed of light and colliding them, the team supplied sufficient energy to convert virtual quark-antiquark pairs into real, detectable particles. The collisions generated strange quark and antiquark pairs, each carrying opposite charges but identical masses. These pairs emerged from single vacuum fluctuations and remained entangled, with correlated properties despite spatial separation. Measurements from the STAR detector at RHIC confirmed that the spins of the quarks and antiquarks aligned, demonstrating their shared quantum origin.

Individual quarks are unstable and rapidly combine to form composite particles. In the RHIC experiments, quarks merged to create lambda hyperons, neutral particles consisting of three quarks, including a strange quark. The spin of each lambda hyperon reflected the spin of its constituent strange quark. Although lambda hyperons decay rapidly, they produce secondary particles that the STAR detector can observe, allowing researchers to trace spin information from the original quarks to the resulting particles.

This research offers insights into the origin of proton mass. While quarks contribute only a fraction of a proton's total mass, the majority is generated through internal interactions within the proton. Tu’s team suggests that studying virtual particle dynamics can provide a better understanding of the mechanisms that produce mass. By following quarks from their virtual emergence to their assembly into real particles, the experiments create a model for examining quark confinement, entanglement, and the overall dynamics of subatomic particles.

The findings indicate that what appears as empty space may actually serve as a source of matter. Virtual particles from the quantum vacuum, when supplied with energy, can become real and detectable. This research implies that many properties of the universe’s fundamental components, including mass, arise not only from the particles themselves but also from the vacuum fluctuations that generate them. In essence, the quantum vacuum may play a crucial role in the formation of matter, showing that “nothing” can be a significant contributor to the universe’s structure.

Sources:

• Scientists Create Matter from Nothing in Breakthrough Experiment
• Virtual Particles and the Quantum Vacuum
• Brookhaven National Laboratory's Latest Quantum Physics Experiment
• Scientists Made Something Out of Nothing. Literally.