Quantum Computers Simulate Particle Creation in Expanding Universe

Researchers have successfully simulated particle creation in an expanding universe using IBM's quantum computers. Published in Scientific Reports, the study marks a step in employing digital quantum simulations to explore cosmological phenomena. Using only four qubits and error mitigation techniques, the team simulated particle creation using the Friedman-Lemaître-Robertson-Walker (FLRW) metric, which describes a uniform and constantly expanding universe. They modified the Klein-Gordon equation to reflect the effects of curved spacetime. The simulations demonstrated particle creation in an expanding universe, aligning with theoretical predictions. The research indicates that digital quantum simulations are feasible tools for studying complex cosmological processes, offering insights into fundamental processes that shape the cosmos. As quantum computing advances, these simulations could become more powerful for investigating the universe's mysteries.