3 papers
quant-ph2026
Single-eigenstate test of eigenstate thermalization hypothesis via perturbed eigenstate quench
Zhouhao Guo, Jiaju Zhang
We propose and numerically validate an efficient single-eigenstate diagnostic for the eigenstate thermalization hypothesis (ETH) based on a perturbed eigenstate quench protocol. By…
quant-ph2026
Efficient computation of average subsystem Bures distance between fermionic Gaussian states
Zhouhao Guo, M. A. Rajabpour, Jiaju Zhang
The average subsystem trace distance has been proposed as an indicator of quantum many-body chaos and integrability. However, evaluating it presents two main difficulties: high com…
quant-ph2026
Additivity of disjoint interval entanglement in quasiparticle excited states
Zhouhao Guo, Jiaju Zhang
We investigate mixed-state entanglement measures, namely reflected entropy, mutual information and logarithmic negativity, for two disjoint intervals in one-dimensional systems exc…