Floquet dynamical phase transition and entanglement spectrum

R Jafari, A Akbari - Physical Review A, 2021 - APS
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 …

Finite-temperature dynamical quantum phase transition in a non-Hermitian system

D Mondal, T Nag - Physical Review B, 2023 - APS
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 …

Dynamical quantum phase transitions in a mesoscopic superconducting system

K Wrześniewski, I Weymann, N Sedlmayr, T Domański - Physical Review B, 2022 - APS
We inspect the signatures of dynamical quantum phase transitions driven by quantum
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 …

Geometric phases of mixed quantum states: A comparative study of interferometric and Uhlmann phases

XY Hou, X Wang, Z Zhou, H Guo, CC Chien - Physical Review B, 2023 - APS
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 …

Floquet dynamical quantum phase transitions under synchronized periodic driving

R Jafari, A Akbari, U Mishra, H Johannesson - Physical Review B, 2022 - APS
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 …

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 …

Comparison of finite-temperature topological indicators based on Uhlmann connection

Y Zhang, A Pi, Y He, CC Chien - Physical Review B, 2021 - APS
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 …

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 …

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 …