101 citations · 455 across the 15 of their papers we have counts for
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Fidelity and quantum geometry approach to Dirac exceptional points in diamond nitrogen-vacancy centers
Chia-Yi Ju, Gunnar Möller, Yu-Chin Tzeng
Dirac exceptional points (EPs) represent a novel class of non-Hermitian singularities that, unlike conventional EPs, reside entirely within the parity-time unbroken phase and exhib…
Entanglement Hamiltonian and effective temperature of non-Hermitian quantum spin ladders
Pei-Yun Yang, Yu-Chin Tzeng
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 p…
General properties of fidelity in non-Hermitian quantum systems with PT symmetry
Yi-Ting Tu, Iksu Jang, Po-Yao Chang +1
The fidelity susceptibility is a tool for studying quantum phase transitions in the Hermitian condensed matter systems. Recently, it has been generalized with the biorthogonal basi…
Hunting for the non-Hermitian exceptional points with fidelity susceptibility
Yu-Chin Tzeng, Chia-Yi Ju, Guang-Yin Chen +1
The fidelity susceptibility has been used to detect quantum phase transitions in the Hermitian quantum many-body systems over a decade, where the fidelity susceptibility density ap…
Entanglement convertibility by sweeping through the quantum phases of the alternating bonds chain
Yu-Chin Tzeng, Li Dai, M. -C. Chung +2
We study the entanglement structure and the topological edge states of the ground state of the spin-1/2 XXZ model with bond alternation. We employ parity-density matrix renormaliza…
Fidelity approach to Gaussian transitions
Yu-Chin Tzeng, Hsiang-Hsuan Hung, Yung-Chung Chen +1
The fidelity approach to the Gaussian transitions in spin-one XXZ spin chains with three different values of Ising-like anisotropy lambda is analyzed by means of the density matrix…