222 citations · 1.7k across the 67 of their papers we have counts for
67 papers
Local geometry and quantum geometric tensor of mixed states
Xu-Yang Hou, Zheng Zhou, Xin Wang +2
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 extractin…
Aperiodic dynamical quantum phase transitions in multi-band Bloch Hamiltonian and its origin
Kaiyuan Cao, Hao Guo, Guangwen Yang
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 Bloch ban…
Geometric phases of mixed quantum states: A comparative study of interferometric and Uhlmann phases
Xu-Yang Hou, Xin Wang, Zheng Zhou +2
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 two g…
Uhlmann phase of coherent states and the Uhlmann-Berry correspondence
Xin Wang, Xu-Yang Hou, Zheng Zhou +2
We first compare the geometric frameworks behind the Uhlmann and Berry phases in a fiber-bundle language and then evaluate the Uhlmann phases of bosonic and fermionic coherent stat…
Large theory of critical Fermi surfaces II: conductivity
Haoyu Guo, Aavishkar A. Patel, Ilya Esterlis +1
A Fermi surface coupled to a scalar field can be described in a expansion by choosing the fermion-scalar Yukawa coupling to be random in the -dimensional flavor space, but…
Generalizations of Berry phase and differentiation of purified state and thermal vacuum of mixed states
Xu-Yang Hou, Zi-Wen Huang, Zheng Zhou +3
Two representations of mixed states by state-vectors, known as purified state and thermal vacuum, have been realized on quantum computers. While the two representations look simila…