Floquet dynamical phase transition and entanglement spectrum
We explore both pure and mixed state Floquet dynamical quantum phase transitions
(FDQFTs) in the one-dimensional p-wave superconductor with a time-driven pairing phase …
(FDQFTs) in the one-dimensional p-wave superconductor with a time-driven pairing phase …
Finite-temperature dynamical quantum phase transition in a non-Hermitian system
We investigate the interplay between non-Hermiticity and finite temperature in the context of
a mixed-state dynamical quantum phase transition (MSDQPT). We consider ap-wave …
a mixed-state dynamical quantum phase transition (MSDQPT). We consider ap-wave …
Dynamical quantum phase transitions in a mesoscopic superconducting system
We inspect the signatures of dynamical quantum phase transitions driven by quantum
quenches acting on a correlated quantum dot embedded between superconducting and …
quenches acting on a correlated quantum dot embedded between superconducting and …
Local geometry and quantum geometric tensor of mixed states
XY Hou, Z Zhou, X Wang, H Guo, CC Chien - Physical Review B, 2024 - APS
The quantum geometric tensor (QGT) is a fundamental concept for characterizing the local
geometry of quantum states. After casting the geometry of pure quantum states and …
geometry of quantum states. After casting the geometry of pure quantum states and …
Geometric phases of mixed quantum states: A comparative study of interferometric and Uhlmann phases
Two geometric phases of mixed quantum states, known as the interferometric phase and
Uhlmann phase, are generalizations of the Berry phase of pure states. After reviewing the …
Uhlmann phase, are generalizations of the Berry phase of pure states. After reviewing the …
Floquet dynamical quantum phase transitions under synchronized periodic driving
We study a generic class of fermionic two-band models under synchronized periodic driving,
ie, with the different terms in a Hamiltonian subject to periodic drives with the same …
ie, with the different terms in a Hamiltonian subject to periodic drives with the same …
Finite-temperature topological phase transitions of spin- systems in Uhlmann processes: General formalism and experimental protocols
XY Hou, H Guo, CC Chien - Physical Review A, 2021 - APS
The Uhlmann process is built on the density matrix of a mixed quantum state and offers a
way to characterize topological properties at finite temperatures. We analyze an ideal spin-j …
way to characterize topological properties at finite temperatures. We analyze an ideal spin-j …
Comparison of finite-temperature topological indicators based on Uhlmann connection
Two indicators of finite-temperature topological properties based on the Uhlmann
connection, one generalizing the Wilson loop to the Uhlmann-Wilson loop and the other …
connection, one generalizing the Wilson loop to the Uhlmann-Wilson loop and the other …
Metamorphic dynamical quantum phase transition in double-quench processes at finite temperatures
XY Hou, QC Gao, H Guo, CC Chien - Physical Review B, 2022 - APS
By deriving a general framework and analyzing concrete examples, we demonstrate a class
of dynamical quantum phase transitions (DQPTs) in one-dimensional two-band systems …
of dynamical quantum phase transitions (DQPTs) in one-dimensional two-band systems …
Aperiodic dynamical quantum phase transition in multi-band Bloch Hamiltonian and its origin
K Cao, H Guo, G Yang - Journal of Physics: Condensed Matter, 2024 - iopscience.iop.org
We investigate the dynamical quantum phase transition (DQPT) in the multi-band Bloch
Hamiltonian of the one-dimensional periodic Kitaev model, focusing on quenches from a …
Hamiltonian of the one-dimensional periodic Kitaev model, focusing on quenches from a …