5 papers
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 a clear understanding of the quantitative impact of weak and strong symmetries on critic…
Emergent continuous symmetry and ground-state factorization induced by long-range interactions
Yue Yu, Myung-Joong Hwang
The spontaneous breaking of a symmetry typically gives rise to emergent excitations possessing the same symmetry with a renormalized mass. Contrary to this conventional wisdo…
Nonreciprocal and Geometric Frustration in Dissipative Quantum Spins
Guitao Lyu, Myung-Joong Hwang
Nonreciprocal interactions often create conflicting dynamical objectives that cannot be simultaneously satisfied, leading to nonreciprocal frustration. On the other hand, geometric…
Fundamental Scaling Limit in Critical Quantum Metrology
Ju-Yeon Gyhm, Hyukjoon Kwon, Myung-Joong Hwang
Critical quantum metrology aims to harness critical properties near quantum phase transitions to enhance parameter estimation precision. However, critical slowing down inherently l…
Diverging entanglement of critical magnons in easy-axis antiferromagnets
Jongjun M. Lee, Hyun-Woo Lee, Myung-Joong Hwang
We study the instability of antiferromagnets with easy-axis anisotropy under a magnetic field, uncovering single or even multiple phase transitions at the boundary between non-coll…