Researchers have made a breakthrough in non-Hermitian quantum systems by discovering a method to construct theories with tunable exceptional points (EPs) and controlled state purification. This achievement relies on momentum-space deformation, which provides a general design principle for creating and controlling EPs in quadratic many-body Hamiltonians. By identifying universal criteria for momentum sectors to host EPs, scientists can now induce a single momentum-sector EP, paving the way for significant advancements in quantum computing. The ability to control EPs is crucial, as it enables the manipulation of quantum states, which is essential for quantum computing and cryptography applications. This development has significant implications for the field of quantum computing, as it challenges traditional assumptions about computation and cryptography1. So what matters to practitioners is that this breakthrough could lead to the creation of more robust and secure quantum computing systems, ultimately rewriting the rules of computation and cryptography.