9 citations · 22 across the 11 of their papers we have counts for
12 papers
Metric-Changing Quasi-Hermitian Quenches: Normalized Loschmidt Amplitude and Complex-Time Zeros
Xu-Yang Hou, Jia-Chen Tang, Hao Guo
In quasi-Hermitian mixed-state quenches, the initial and final Hamiltonians generally possess different positive-definite metrics, so post-quench evolution is not quasi-unitary in…
Thermal Suppression of Dynamical Quantum Phase Transitions in Finite-Dimensional Systems A Quasi-Hermitian Framework
Jia-Chen Tang, Xu-Yang Hou, Ming-Zhang Wang +1
We investigate dynamical quantum phase transitions (DQPTs) in finite-dimensional systems prepared in thermal equilibrium states and subjected to a sudden quench. A mixed-state Losc…
Wilczek-Zee Realization of Uhlmann Parallel Transport
Yu-Huan Huang, Xu-Yang Hou, Jia-Chen Tang +1
The Uhlmann phase extends geometric phases to mixed quantum states via a parallel-transport condition on purification amplitudes, yet its direct implementation under standard Hamil…
Electrical-Circuit Simulation of the Uhlmann Phase
Yu-Huan Huang, Yu Wang, Jia-Chen Tang +2
The Uhlmann phase extends the concept of geometric phases to mixed quantum states through a parallel-transport condition on purification amplitudes, but its experimental realizatio…
Evolution of quantum geometric tensor of 1D periodic systems after a quench
Jia-Chen Tang, Xu-Yang Hou, Yu-Huan Huang +1
We investigate the post-quench dynamics of the quantum geometric tensor (QGT) of 1D periodic systems with a suddenly changed Hamiltonian. The diagonal component with respect to the…
Bound-like State in a 1D Self-Similar Delta-Barrier Array
Jia-Chen Tang, Xu-Yang Hou, Yan He +1
We investigate a one-dimensional quantum system with a self-similar arrangement of delta-function potential barriers, exhibiting discrete scale invariance. The singular potential i…
Mixed-state geometric phases of coherent and squeezed spin states
Xin Wang, Jia-Chen Tang, Xu-Yang Hou +2
Two mixed-state geometric phases, known as the Uhlmann phase and interferometric geometric phase (IGP), of spin coherent states (CSSs) and spin squeezed states (SSSs) are analyzed.…
Mathematical Foundation of the U Quantum Geometric Tensor
Xin Wang, Xu-Yang Hou, Jia-Chen Tang +1
In this paper, we systematically establish the mathematical foundation for the quantum geometric tensor (QGT) of mixed states Explicitly, we present a description b…
Geometry effect of the dynamical quantum phase transitions at finite temperatures
Jia-Chen Tang, Xu-Yang Hou, Hao Guo
Dynamical quantum phase transitions (DQPTs) probe the nonequilibrium evolution of quantum systems, unveiling their geometric and topological characteristics. In this study, we intr…
Uhlmann quench and geometric dynamic quantum phase transition of mixed states
Jia-Chen Tang, Xu-Yang Hou, Zheng Zhou +2
Dynamic quantum phase transitions (DQPT) following quantum quenches exhibit singular behavior of the overlap between the initial and evolved states. Here we present a formalism to…
Sjqvist quantum geometric tensor of finite-temperature mixed states
Zheng Zhou, Xu-Yang Hou, Xin Wang +3
The quantum geometric tensor (QGT) reveals local geometric properties and associated topological information of quantum states. Here a generalization of the QGT to mixed quantum st…
Interferometric Geometric Phases of -symmetric Quantum Mechanics
Xin Wang, Zheng Zhou, Jia-Chen Tang +3
We present a generalization of the geometric phase to pure and thermal states in -symmetric quantum mechanics (PTQM) based on the approach of the interferometric geom…