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quant-ph2026
Frustrated superradiant phases in one- and two-dimensional lattices
Jongjun M. Lee, Myung-Joong Hwang
Understanding how frustration and symmetry breaking shape collective behavior is a central problem in quantum many-body systems. In this work, we investigate this problem in large…
quant-ph2026
Enhanced dissipative criticality at an exceptional point
Jongjun M. Lee
Exceptional points (EPs) represent non-Hermitian degeneracies where eigenvalues and eigenvectors coalesce, giving rise to enhanced sensitivity and critically damped dynamics. We de…
quant-ph2026
Universality classes split by strong and weak symmetries
Jongjun M. Lee, Myung-Joong Hwang, Igor Boettcher
Dissipative phase transitions are strongly shaped by the symmetries of the Liouvillian, yet the quantitative impact of weak and strong symmetries on critical behavior has remained…