Experimental witness of quantum jump induced high-order Liouvillian exceptional points.

ABSTRACT: The exceptional point has presented considerably interesting and counterintuitive phenomena associated with nonreciprocity, precision measurement, and topological dynamics. The Liouvillian exceptional point (LEP), involving the interplay of energy loss and decoherence inherently relevant to quantum jumps, has recently drawn much attention due to capability to fully capture quantum system dynamics and naturally facilitate non-Hermitian quantum investigations. It was also predicted that quantum jumps could give rise to third-order LEPs in two-level quantum systems for its high dimensional Liouvillian superoperator, which, however, has never been experimentally confirmed until now. Here we report the observation of the third-order LEPs emerging from quantum jumps in an ultracold two-level tra

SUBMITTER: Wu ZZ 

PROVIDER: S-EPMC12923587 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature