35 citations · 53 across the 4 of their papers we have counts for
5 papers · 1 filter
Quantum Spin Squeezing Enhanced by Critical Exceptional Points
Yuma Nakanishi
Critical exceptional points (CEPs) are nonequilibrium critical points in open many-body systems at which multiple collective excitation modes coalesce. CEPs are known to amplify cl…
Lindbladian PT phase transitions
Yuma Nakanishi, Tomohiro Sasamoto
A parity-time (PT) transition is a spectral transition characteristic of non-Hermitian generators; it typically occurs at an exceptional point, where multiple eigenvectors coalesce…
Continuous time crystals as a PT symmetric state and the emergence of critical exceptional points
Yuma Nakanishi, Ryo Hanai, Tomohiro Sasamoto
Continuous time-translation symmetry is often spontaneously broken in open quantum systems, and the condition for their emergence has been actively investigated. However, there are…
Dissipative time crystals originating from parity-time symmetry
Yuma Nakanishi, Tomohiro Sasamoto
This study aims to provide evidence regarding the emergence of a class of dissipative time crystals when symmetry of the systems is restored in collective spin syste…
phase transition in open quantum systems with Lindblad dynamics
Yuma Nakanishi, Tomohiro Sasamoto
We investigate parity-time () phase transitions in open quantum systems and discuss a criterion of Liouvillian symmetry proposed recently by Huber \tex…