199 citations · 1.6k across the 37 of their papers we have counts for
37 papers · 1 filter
Quantum steering for two-mode states with Continuous-variable in laser channel
Kaimin Zheng, Jifeng Sun, Liyun Hu +1
The Einstein-Podolsky-Rosen steering is an important resource for one-sided device independent quantum information processing. This steering property will be destroyed during the i…
Adaptive protocols for SU(11) interferometers to achieve ab initio phase estimation at the Heisenberg limit
Mingchen Liu, Lijian Zhang, Haixing Miao
The precision of phase estimation with interferometers can be greatly enhanced using non-classical quantum states, and the SU(11) interferometer is an elegant scheme, which generat…
Resource-efficient Direct Characterization of General Density Matrix
Liang Xu, Mingti Zhou, Runxia Tao +12
Sequential weak measurements allow the direct extraction of individual density-matrix elements instead of globally reconstructing the whole density matrix, opening a new avenue for…
Interaction-free, single-pixel quantum imaging with undetected photons
Yiquan Yang, Hong Liang, Xiaze Xu +3
A typical imaging scenario requires three basic ingredients: 1. a light source that emits light, which in turn interacts and scatters off the object of interest; 2. detection of th…
A Scheme for Deterministic N-photon State Generation Using Lithium Niobate on Insulator Device
Hua-Ying Liu, Minghao Shang, Xiaoyi Liu +6
Large-photon-number quantum state is a fundamental but non-resolved request for practical quantum information applications. Here we propose an N-photon state generation scheme that…
Efficient Distinction between Quantum Direct and Common Causes and its Experimental Verification
Feixiang Xu, Jia-Yi Lin, Ben Wang +4
Identifying the causal structures between two statistically correlated events has been widely investigated in many fields of science. While some of the well-studied classical metho…
Directly Characterizing the Coherence of Quantum Detectors by Sequential Measurement
Liang Xu, Huichao Xu, Jie Xie +4
The quantum properties of quantum measurements are indispensable resources in quantum information processing and have drawn extensive research interest. The conventional approach t…
Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit
Feixiang Xu, Xiao-Ming Zhang, Liang Xu +3
Quantum target detection is an emerging application that utilizes entanglement to enhance the sensing of the presence of an object. Although several experimental demonstrations for…
Improving the Precision of Optical Metrology by Detecting Fewer Photons
Peng Yin, Wen-Hao Zhang, Liang Xu +13
In optical metrological protocols to measure physical quantities, it is, in principle, always beneficial to increase photon number to improve measurement precision. However, practi…
Quantum-limited Localisation and Resolution in Three Dimensions
Ben Wang, Liang Xu, Lijian Zhang
As a method to extract information from optical system, imaging can be viewed as a parameter estimation problem. The fundamental precision in locating one emitter or estimating the…
Quantum-enhanced stochastic phase estimation with SU(1,1) interferometer
Kaimin Zheng, Minghao Mi, Ben Wang +5
The quantum stochastic phase estimation has many applications in the precise measurement of various physical parameters. Similar to the estimation of a constant phase, there is a s…
Quantum verification of NP problems with single photons and linear optics
Aonan Zhang, Hao Zhan, Junjie Liao +5
Quantum computing is seeking to realize hardware-optimized algorithms for application-related computational tasks. NP (nondeterministic-polynomial-time) is a complexity class conta…
Approaching quantum-limited metrology with imperfect detectors by using weak-value amplification
Liang Xu, Zexuan Liu, Animesh Datta +4
Weak value amplification (WVA) is a metrological protocol that amplifies ultra-small physical effects. However, the amplified outcomes necessarily occur with highly suppressed prob…
Direct Characterization of Quantum Measurements using Weak Values
Liang Xu, Huichao Xu, Tao Jiang +5
The time-symmetric formalism endows the weak measurement and its outcome, the weak value,many unique features. In particular, it allows a direct tomography of quantum states withou…
Neural Networks for Quantum Inverse Problems
Ningping Cao, Jie Xie, Aonan Zhang +3
Quantum Inverse Problem (QIP) is the problem of estimating an unknown quantum system from a set of measurements, whereas the classical counterpart is the Inverse Problem of est…
Distillation of Gaussian Einstein-Podolsky-Rosen steering with noiseless linear amplification
Yang Liu, Kaimin Zheng, Haijun Kang +5
Einstein-Podolsky-Rosen (EPR) steering is one of the most intriguing features of quantum mechanics and an important resource for quantum communication. For practical applications,…
Experimental quantification of coherence of a tunable quantum detector
Huichao Xu, Feixiang Xu, Thomas Theurer +5
Quantum coherence is a fundamental resource that quantum technologies exploit to achieve performance beyond that of classical devices. A necessary prerequisite to achieve this adva…
Entirety of Quantum Uncertainty and Its Experimental Verification
Jie Xie, Songtao Huang, Li Zhou +5
As a foundation of modern physics, uncertainty relations describe an ultimate limit for the measurement uncertainty of incompatible observables. Traditionally, uncertain relations…
Observing geometry of quantum states in a three-level system
Jie Xie, Aonan Zhang, Ningping Cao +7
In quantum mechanics, geometry has been demonstrated as a useful tool for inferring non-classical behaviors and exotic properties of quantum systems. One standard approach to illus…
Experimental self-characterization of quantum measurements
Aonan Zhang, Jie Xie, Huichao Xu +5
The accurate and reliable description of measurement devices is a central problem in both observing uniquely non-classical behaviors and realizing quantum technologies from powerfu…
Quantum Tomography of the Photon-Plasmon Conversion Process in a Metal Hole Array
Lei Tang, Kaimin Zheng, Jiale Guo +8
In the past decades, quantum plasmonics has become an active area due to its potential applications in on-chip plasmonic devices for quantum information processing. However, the fu…
Experimental test of contextuality in quantum and classical systems
Aonan Zhang, Huichao Xu, Jie Xie +4
Contextuality is considered as an intrinsic signature of non-classicality, and a crucial resource for achieving unique advantages of quantum information processing. However, recent…
Quantum interferometry via a coherent state mixed with a photon-added squeezed vacuum state
Shui Wang, Xuexiang Xu, Yejun Xu +1
We theoretically investigate the phase sensitivity with parity detection on a Mach-Zehnder interferometer with a coherent state combined with a photon-added squeezed vacuum state.…
Simulating broken -symmetric Hamiltonian systems by weak measurement
Minyi Huang, Ray-Kuang Lee, Lijian Zhang +2
By embedding a -symmetric (pseudo-Hermitian) system into a large Hermitian one, we disclose the relations between -symmetric Hamiltonians and weak measurement th…