Non-hermitian strongly interacting Dirac fermions

XJ Yu, Z Pan, L Xu, ZX Li - Physical Review Letters, 2024 - APS
Exotic quantum phases and phase transition in the strongly interacting Dirac systems have
attracted tremendous interests. On the other hand, non-Hermitian physics, usually …

Quantum phase transition and critical behavior between the gapless topological phases

HL Zhang, HZ Li, S Yang, XJ Yu - Physical Review A, 2024 - APS
The phase transition between gapped topological phases represents a class of
unconventional criticality beyond the Landau paradigm. However, recent research has …

Fidelity susceptibility at the Lifshitz transition between the noninteracting topologically distinct quantum critical points

XJ Yu, WL Li - Physical Review B, 2024 - APS
By constructing an exactly solvable spin model, we investigate the critical behaviors of
transverse-field Ising chains interpolated with cluster interactions, which exhibit various …

Identifying non-Hermitian critical points with the quantum metric

JF Ren, J Li, HT Ding, DW Zhang - Physical Review A, 2024 - APS
The geometric properties of quantum states are fully encoded by the quantum geometric
tensor. The real and imaginary parts of the quantum geometric tensor are the quantum …

Fidelity susceptibility as a diagnostic of the commensurate-incommensurate transition: A revisit of the programmable Rydberg chain

XJ Yu, S Yang, JB Xu, L Xu - Physical Review B, 2022 - APS
In recent years, programmable Rydberg-atom arrays have been widely used to simulate
new quantum phases and phase transitions, generating great interest among theorists and …

Einstein's quantum elevator: Hermitization of non-Hermitian Hamiltonians via a generalized vielbein formalism

CY Ju, A Miranowicz, F Minganti, CT Chan… - Physical Review …, 2022 - APS
The formalism for non-Hermitian quantum systems sometimes blurs the underlying physics.
We present a systematic study of the vielbeinlike formalism which transforms the Hilbert …

Dynamical phase transition and scaling in the chiral clock Potts chain

XJ Yu - Physical Review A, 2023 - APS
Based on time-dependent variational-principle algorithms, we investigate the dynamical
critical behavior of quantum three-state Potts chains with chiral interactions. Using the …

Rényi entropies and negative central charges in non-Hermitian quantum systems

YT Tu, YC Tzeng, PY Chang - SciPost Physics, 2022 - scipost.org
Quantum entanglement is one essential element to characterize many-body quantum
systems. However, the entanglement measures are mostly discussed in Hermitian systems …

Quantum criticality of a -symmetric spin chain with long-range interactions

XJ Yu, C Ding, L Xu - Physical Review E, 2023 - APS
Based on large-scale density matrix renormalization group techniques, we investigate the
critical behaviors of quantum three-state Potts chains with long-range interactions. Using …

Entanglement Hamiltonian and effective temperature of non-Hermitian quantum spin ladders

PY Yang, YC Tzeng - SciPost Physics Core, 2024 - scipost.org
Quantum entanglement plays a crucial role not only in understanding Hermitian many-body
systems but also in offering valuable insights into non-Hermitian quantum systems. In this …