3 papers
quant-ph2025
Exploring critical states of the quantum Rabi model via Hamiltonian variational ansätze
Mei Peng, Xu-Dan Xie, Dan-Bo Zhang
Characterizing quantum critical states towards the thermodynamic limit is essential for understanding phases of matter. The power of quantum simulators for preparing the critical s…
quant-ph2025
Variational Quantum Algorithm for Solving the Liouvillian Gap
Xu-Dan Xie, Zheng-Yuan Xue, Dan-Bo Zhang
In open quantum systems, the Liouvillian gap characterizes the relaxation time toward the steady state. However, accurately computing this quantity is notoriously difficult due to…
quant-ph2024
Determining non-Hermitian parent Hamiltonian from a single eigenstate
Xu-Dan Xie, Zheng-Yuan Xue, Dan-Bo Zhang
A quantum state for being an eigenstate of some local Hamiltonian should be constraint by zero energy variance and consequently, the constraint is rather strong that a single eigen…