435 citations · 865 across the 23 of their papers we have counts for
23 papers
Heralded high-dimensional module-based quantum computation
Xiao Zhang, Wen-Qiang Liu, Hai-Rui Wei
Parity measurements have been explored as building blocks for preparing and discriminating entangled states, as well as for implementing quantum computation. We first develop two a…
Effective schemes for fusion of hyperentangled W states
Wen-Xiu Zhang, Wen-Qiang Liu, Hai-Rui Wei
Hyperentangled states are fascinating resources in quantum information processing as they can significantly increase the channel capacity and enhance noise resistance. We explore a…
Remote state preparation of single-partite high-dimensional states in complex Hilbert spaces
Jun-Hai Zhao, Si-Qi Du, Wen-Qiang Liu +2
High-dimensional quantum systems offer a new playground for quantum information applications due to their remarkable advantages such as higher capacity and noise resistance. We pro…
Efficient and deterministic high-dimensional controlled-swap gates on hybrid linear optical systems with high fidelity
Gui-Long Jiang, Jun-Bin Yuan, Wen-Qiang Liu +1
Implementation of quantum logic gates with linear optical elements plays a prominent role in quantum computing due to the relatively easier manipulation and realization. We present…
Deterministic generation of multi-qubit entangled states among distant parties using indefinite causal order
Wen-Qiang Liu, Hai-Rui Wei
Quantum entanglement plays an irreplaceable role in various remote quantum information processing tasks. Here we present protocols for generating deterministic and heralded -qub…
Optimal synthesis of general multi-qutrit quantum computation
Gui-Long Jiang, Wen-Qiang Liu, Hai-Rui Wei
Quantum circuits of a general quantum gate acting on multiple -level quantum systems play a prominent role in multi-valued quantum computation. We first propose a new recursive…
Experimentally demonstrating indefinite causal order algorithms to solve the generalized Deutsch's problem
Wen-Qiang Liu, Zhe Meng, Bo-Wen Song +6
Deutsch's algorithm is the first quantum algorithm to show the advantage over the classical algorithm. Here we generalize Deutsch's problem to functions and propose a new quant…
Practically Enhanced Hyperentanglement Concentration for Polarization-spatial Hyperentangled Bell States with Linear Optics and Common Single-photon Detectors
Gui-Long Jiang, Wen-Qiang Liu, Hai-Rui Wei
Hyperentanglement, defined as the simultaneous entanglement in several independent degrees of freedom (DOFs) of a quantum system, is a fascinating resource in quantum information p…
Heralded and high-efficient entanglement concentrations based on linear optics assisted by time-delay degree of freedom
Gui-Long Jiang, Wen-Qiang Liu, Hai-Rui Wei
Entanglement concentration is a critical technique to prevent degraded fidelity and security in long-distance quantum communication. We propose novel practical entanglement concent…
Experimental investigation of quantum correlations in a two-qutrit spin system
Yue Fu, Wenquan Liu, Xiangyu Ye +5
We report an experimental investigation of quantum correlations in a two-qutrit spin system in a single nitrogen-vacancy center in diamond at room temperatures. Quantum entanglemen…
Linear optical universal quantum gates with higher success probabilities
Wen-Qiang Liu, Hai-Rui Wei
Universal quantum gates lie at the heart of designing quantum computer. We construct two compact quantum circuits to implement post-selected controlled-phase-flip (CPF) gate and To…
Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom
Xin-Jie Zhou, Wen-Qiang Liu, Hai-Rui Wei +2
Hyperentangled Bell states analysis (HBSA) is an essential building block for certain hyper-parallel quantum information processing. We propose a complete and deterministic HBSA sc…
Collective unitary evolution with linear optics by Cartan decomposition
Wen-Qiang Liu, Xin-Jie Zhou, Hai-Rui Wei
Unitary operation is an essential step for quantum information processing. We first propose an iterative procedure for decomposing a general unitary operation without resorting to…
Complete hyperentangled Bell states analysis for polarization-spatial-time-bin degrees of freedom with unity fidelity
Xin-Jie Zhou, Wen-Qiang Liu, Yan-Bei Zheng +2
Hyperentangled states can outperform their classical counterparts on solving certain tasks. Here we present a simplified scheme for completely distinguishing two-photon hyperentang…
Universal quantum multi-qubit entangling gates with auxiliary spaces
Wen-Qiang Liu, Hai-Rui Wei, Leong-Chuan Kwek
Universal quantum entangling gates are a crucial building block in the large-scale quantum computation and quantum communication, and it is an important task to find simple ways to…
Hyperparallel transistor, router and dynamic random access memory with unity fidelities
Ji-Zhen Liu, Ning-Yang Chen, Wen-Qiang Liu +2
We theoretically implement some hyperparallel optical elements, including quantum single photon transistor, router, and dynamic random access memory (DRAM). The inevitable side lea…
Low-cost Fredkin gate with auxiliary space
Wen-Qiang Liu, Hai-Rui Wei, Leong-Chuan Kwek
Effective quantum information processing is tantamount in part to the minimization the quantum resources needed by quantum logic gates. Here, we propose an optimization of an n-con…
Efficient Fusion of Photonic W-states with Nonunitary Partial-swap Gates
Hai-Rui Wei, Wen-Qiang Liu, Leong-Chuan Kwek
We introduce a nonunitary partial-swap gate for fusing arbitrary small-sized photonic W-states into a large-scale entangled network of W-state efficiently without ancillary photons…
Optimal synthesis of the Fredkin gate in a multilevel system
Wen-Qiang Liu, Hai-Rui Wei
The optimal cost of a three-qubit Fredkin gate is 5 two-qubit entangling gates, and the overhead climbs to 8 when restricted to controlled-not (CNOT) gates. By harnessing higher-di…
Implementing two-photon three-degree-of-freedom hyper-parallel controlled phase flip gate through cavity-assisted interactions
Hai-Rui Wei, Wen-Qiang Liu, Ning-Yang Chen
Hyper-parallel quantum information processing is a promising and beneficial research field. In this paper, we present a method to implement a hyper-parallel controlled-phase-flip (…
Dynamically encircling an exceptional point in a real quantum system
Wenquan Liu, Yang Wu, Chang-Kui Duan +2
The exceptional point, known as the non-Hermitian degeneracy, has special topological structure, leading to various counterintuitive phenomena and novel applications, which are ref…
Implementations of more general solid-state (SWAP) and controlled-(swap) gates
Wen-Qiang Liu, Hai-Rui Wei
Universal quantum gates are the core elements in quantum information processing. We design two schemes to realize more general (SWAP) and controlled--(swap) gates (…
Observation of parity-time symmetry breaking in a single spin system
Yang Wu, Wenqiang Liu, Jianpei Geng +5
A fundamental axiom of quantum mechanics requires the Hamiltonians to be Hermitian which guarantees real eigen-energies and probability conservation. However, a class of non-Hermit…