Quantum News Quantum Physics

China has a new 71 site Bose–Hubbard quantum simulator for quantum electrodynamics research

November 25, 2020

As of late November 2020, The University of Science and Technology of China (USTC) has announced its new breakthrough. Through collaboration with Heidelberg University in Germany and The University of Trento in Italy, they have successfully created a new 71 site Bose–Hubbard quantum simulator. This is groundbreaking for electrodynamics, especially gauge theory.

As classical computers struggle to simulate and calculate the complex problems in gauge theory, scientists decided to create a new quantum computer that can confidently handle these complicated problems. This new computer can construct light lattices to be experimented upon, and the simulation can accurately control the quantum states as well as use a quantum gas microscope to observe these states and understand them.

This breakthrough shows the potential of quantum simulations to help better understand fundamental physics

Before this, current research cannot observe the simplest aspect of gauge theory, that is gauge in-variance. Because of this, the researchers behind this new simulation invented their new 71 site Bose–Hubbard quantum simulator. It was used to simulate single-dimension Schwinger models grids, and thus gauge in-variance was observed for the first time. This was also the first time that a multi-grid quantum simulation proved the Gauss’ Law. Important breakthroughs indeed.

This is an important step in simulating light lattices and proves that quantum computing simulations have huge potential.

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