64 citations · 378 across the 21 of their papers we have counts for
21 papers
Degeneracy in excited-state quantum phase transitions of two-level bosonic models and its influence on system dynamics
J. Khalouf-Rivera, Qian Wang, Lea F. Santos +3
Excited-state quantum phase transitions (ESQPTs) strongly influence the spectral properties of collective many-body quantum systems, changing degeneracy patterns in different quant…
The failure of semiclassical approach in the dissipative fully-connected Ising model
Ni Zhihao, Qinhan Wu, Qian Wang +2
We solve the fully-connected Ising model in the presence of dissipation and time-periodic field, with the corresponding Lindblad equation having a time-periodic Liouvillian. The dy…
Quantum Chaos in the Extended Dicke Model
Qian Wang
We systematically study the chaotic signatures in a quantum many-body system consisting of an ensemble of interacting two-level atoms coupled to a single-mode bosonic field, the so…
Characterizing the Lipkin-Meshkov-Glick excited spectrum through the quantum coherence spectrum
Qian Wang, Francisco Pérez-Bernal
Excited-state quantum phase transitions extend the quantum phase transition concept beyond the ground state and offer insights into the complex behavior of quantum systems. In the…
Multifractality in quasienergy space of coherent states as a signature of quantum chaos
Qian Wang, Marko Robnik
We present the multifractal analysis of coherent states in kicked top model by expanding them in the basis of Floquet operator eigenstates. We demonstrate the manifestation of phas…
Super-exponential scrambling of Out-of-time-ordered correlators
Wen-Lei Zhao, Yue Hu, Zhi Li +1
Out-of-time-ordered correlators (OTOCs) are an effective tool in characterizing black hole chaos, many-body thermalization and quantum dynamics instability. Previous research findi…