Dissipative time crystals originating from parity-time symmetry
Yuma Nakanishi and Tomohiro Sasamoto
Phys. Rev. A 107, L010201 (2023) - Published 13 January, 2023
The authors provide evidence for the emergence of a class of dissipative time crystals when parity-time () symmetry is restored in collective spin systems with Lindblad dynamics. They show that a standard model of boundary time crystals satisfies Liouvillian symmetry, and prove that boundary time crystals exist only when the stationary state is symmetric in the large-spin limit.
Non-Hermitian squeezed polarons
Fang Qin (覃昉), Ruizhe Shen, and Ching Hua Lee
Phys. Rev. A 107, L010202 (2023) - Published 26 January, 2023
Polarons are dressed states caused by interacting impurities. In this work, the authors discovered that non-Hermiticity can fundamentally “squeeze” the polaron into an asymmetric spatial profile. Yet, despite their locality, such squeezed polarons drastically modify the energy spectrum of the entire system.










