4 papers · 1 filter
State-Dependent Visibility of Non-Commutative Ordering in Quantum Dynamics
Ji-Chong Yang, Gui-Qi Hu
A nonzero commutator proves that two orderings differ as operators, but it does not ensure that a physical state can reveal the difference. We ask when non-Abelian ordering informa…
Expressibility and trainability of a two-dimensional pairwise quantum-circuit ansatz
Shuai Zhang, Wei Liu, Ji-Chong Yang
Parameterized quantum circuits~(PQCs) constitute a central building block of variational quantum algorithms~(VQAs) and quantum machine learning~(QML) methods. Existing ansatz desig…
Optimize quantum simulation using a force-gradient integrator
Yi-Tong Zou, Yu-Jiao Bo, Ji-Chong Yang
Quantum simulation has shown great potential in many fields due to its powerful computational capabilities. However, the limited fidelity can lead to a severe limitation on the num…
Circuit-based digital adiabatic quantum simulation and pseudoquantum simulation as new approaches to lattice gauge theory
Xiaopeng Cui, Yu Shi, Ji-Chong Yang
Gauge theory is the framework of the Standard Model of particle physics and is also important in condensed matter physics. As its major non-perturbative approach, lattice gauge the…