71 citations · 290 across the 12 of their papers we have counts for
13 papers
Observing mixed-state Uhlmann winding numbers in integrated photonic quantum walks
Baichu Yu, Qin-Qin Wang, Huilong Huang +7
Integer winding numbers provide a well-established classification of topological phases protected by chiral symmetry at zero temperature, but extending this classification to therm…
Nonunitary Preparation of Nontrivial States from Trivial Regimes in Two-Dimensional Topological Insulators
Qin-Qin Wang, Xiao-Ye Xu, Chuan-Feng Li +1
While remarkable progress has been achieved in engineering nontrivial Hamiltonians across a wide range of physical platforms, preparing their corresponding nontrivial ground states…
3D imaging of the biphoton spatiotemporal wave packet
Yang Xue, Ze-Shan He, Hao-Shu Tian +6
Photons are among the most important carriers of quantum information owing to their rich degrees of freedom (DoFs), including various spatiotemporal structures. The ability to char…
Measuring Mixed-State Topological Invariant in Open Photonic Quantum Walk
Qin-Qin Wang, Xiao-Ye Xu, Yong-Jian Han +2
Pure-state manifestations of geometric phase are well established and have found applications across essentially all branches of physics, yet their generalization to mixed-state re…
Efficient learning of mixed-state tomography for photonic quantum walk
Qin-Qin Wang, Shaojun Dong, Xiao-Wei Li +7
Noise-enhanced applications in open quantum walk (QW) have recently seen a surge due to their ability to improve performance. However, verifying the success of open QW is challengi…
Global calibration of large-scale photonic integrated circuits
Jin-Hao Zheng, Qin-Qin Wang, Lan-Tian Feng +5
The growing maturity of photonic integrated circuit (PIC) fabrication technology enables the high integration of an increasing number of optical components onto a single chip. With…
Counterfactual communication without a trace in the transmission channel
Wei-Wei Pan, Xiao Liu, Xiao-Ye Xu +10
We report an experimental realization of a modified counterfactual communication protocol that eliminates the dominant environmental trace left by photons passing through the trans…
Photonic realization of erasure-based nonlocal measurements
Wei-Wei Pan, Xiao-Ye Xu, Eliahu Cohen +6
Relativity theory severely restricts the ability to perform nonlocal measurements in quantum mechanics. Studying such nonlocal schemes may thus reveal insights regarding the relati…
Direct measurement of a nonlocal entangled quantum state
Wei-Wei Pan, Xiao-Ye Xu, Yaron Kedem +8
Entanglement and wave function description are two of the core concepts that make quantum mechanics such a unique theory. A method to directly measure the wave function, using Weak…
Measurements of nonlocal variables and demonstration of the failure of the product rule for a pre- and postselected pair of photons
Xiao-Ye Xu, Wei-Wei Pan, Qin-Qin Wang +9
We report the first implementation of the von Neumann instantaneous measurements of nonlocal variables which becomes possible due to technological achievements in creating hyperent…
Dynamic-Disorder-Induced Enhancement of Entanglement in Photonic Quantum Walks
Qin-Qin Wang, Xiao-Ye Xu, Wei-Wei Pan +6
Entanglement generation in discrete time quantum walks is deemed to be another key property beyond the transport behaviors. The latter has been widely used in investigating the loc…
Measuring the winding number in a large-scale chiral quantum walk
Xiao-Ye Xu, Qin-Qin Wang, Wei-Wei Pan +8
We report the experimental measurement of the winding number in an unitary chiral quantum walk. Fundamentally, the spin-orbit coupling in discrete time quantum walks is implemented…
Measuring a Dynamical Topological Order Parameter in Quantum Walks
Xiao-Ye Xu, Qin-Qin Wang, Markus Heyl +9
Quantum processes of inherent dynamical nature, such as quantum walks (QWs), defy a description in terms of an equilibrium statistical physics ensemble. Up to now, it has remained…