Researchers at the Institute for Theoretical Physics at Heidelberg University have introduced a new theory that links two major perspectives in modern quantum physics. The work focuses on how a single unusual particle behaves inside a many-body system filled with fermions, often referred to as a Fermi sea. In this environment, the particle can act either as something that moves through the system or as a nearly fixed impurity embedded within it.
The new framework explains how quasiparticles arise and connects two quantum states that were previously treated as separate. According to the Heidelberg team, this unified approach could significantly influence current experiments in quantum matter.
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