A new study by scientists in Vienna uses sound waves in atomic clouds to understand the behavior of quantum particles in spacetime.
For the study, the team examined the speed of sound in ultracold atomic clouds controlled by electromagnetic fields.
But, you might be wondering how studying the speed of sound helps us understand quantum particles in spacetime. The answer lies in the fact that many physical systems are similar. This is because all systems obey the same laws and equations of science.. However, when light passes near heavy objects such as planets and stars, its path, or the light cone, gets bent.
By observing the speed of sound in the atomic clouds, analogous to the speed of light in spacetime, the team could observe phenomena such as bent light cones, lensing effects, and reflections in the quantum simulator.The findings from studying the quantum simulator offer a fresh perspective on the quantum theory of gravity and shed light on how quantum particles behave in curved spacetime.
While the quantum simulator does not directly simulate the full complexity of quantum gravity, it serves as a valuable tool for studying specific aspects and gaining a deeper understanding of the fundamental principles involved. This opens up new avenues for physicists to explore quantum field theories in spacetime and takes us closer to understanding the fundamental forces at play in the universe.We investigate signal propagation in a quantum field simulator of the Klein–Gordon model realized by two strongly coupled parallel one-dimensional quasi-condensates. By measuring local phononic fields after a quench, we observe the propagation of correlations along sharp light-cone fronts.
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