5 papers
Negative quasiprobability trajectories for Bell-diagonal states under local decoherence
Qing Yu, Kun Zhang, Yang-Yang Chen +1
The fluctuation theorem (FT) relates microscopic trajectory distributions to macroscopic averages. Using quasiprobability trajectories, this framework has recently been extended to…
Minimal nonintegrable models with three-site interactions
Wen-Ming Fan, Kun Hao, Yang-Yang Chen +3
We study integrability breaking in translationally invariant spin- chains with genuine three-site interactions. Using a two-qubit composite representation, we prove that the d…
Thermodynamics of the Heisenberg XXX chain with negative spin
Rong Zhong, Yang-Yang Chen, Kun Hao +2
We study the thermodynamics of the isotropic Heisenberg XXX spin chain with negative spin, focusing on the case . The model is equivalent to the quantum lattice nonlinear Sch…
Dynamical Correlation of the Post-quench Non-thermal Equilibrium State
Yang-Yang Chen, Song Cheng
After a quantum quench, the integrable system is expected to relax to a non-thermal equilibrium state (NTES) whose local properties are believed to be governed by a generalized Gib…
Absence of local conserved charges of the Fredkin spin chain and its truncated versions
Wen-Ming Fan, Kun Hao, Yang-Yang Chen +3
Conservation laws serve as the hallmark of integrability. The absence of conserved charges typically implies that the model is nonintegrable. The recently proposed Fredkin spin cha…