573 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Sun Yat-sen UniversityCN8 papers
- Singapore University of Technology and DesignSG7 papers
- North West Agriculture and Forestry University6 papers
- Beihang UniversityCN5 papers
- Southeast UniversityCN5 papers
- Zhejiang UniversityCN5 papers
- Australian National UniversityAU4 papers
- Chinese Academy of SciencesCN4 papers
- Northwestern Polytechnical UniversityCN4 papers
- Xidian UniversityCN4 papers
- Bauhaus-Universität WeimarDE3 papers
- Graduate School of China Academy of Engineering PhysicsCN3 papers
21 papers · 1 filter
Numerical ranges of Bargmann invariants
Jianwei Xu
Bargmann invariants have recently emerged as powerful tools in quantum information theory, with applications ranging from geometric phase characterization to quantum state distingu…
Coherence and imaginarity of quantum states
Jianwei Xu
Baumgratz, Cramer and Plenio established a rigorous framework (BCP framework) for quantifying the coherence of quantum states [\href{http://dx.doi.org/10.1103/PhysRevLett.113.14040…
Quantifying the imaginarity of quantum states via Tsallis relative entropy
Jianwei Xu
It is a fundamental question that why quantum mechanics uses complex numbers instead of only real numbers. To address this topic, recently, a rigorous resource theory for the imagi…
Imaginarity of Gaussian states
Jianwei Xu
It has been a long-standing debate that why quantum mechanics uses complex numbers but not only real numbers. To address this topic, in recent years, the imaginarity theory has bee…
Quantifying the phase of quantum states
Jianwei Xu
Phase is a basic ingredient for quantum states since quantum mechanics uses complex numbers to describe quantum states. In this letter, we introduce a rigorous framework to quantif…
Kirkwood-Dirac classical pure states
Jianwei Xu
Kirkwood-Dirac (KD) distribution is a representation of quantum states. Recently, KD distribution has been employed in many scenarios such as quantum metrology, quantum chaos and f…
Oscillatory states of quantum Kapitza pendulum
Wei He, Chang-Yong Liu
We study quantum mechanics problem described by the Schrödinger equation with Kapitza pendulum potential, that is the asymmetric double-well potential on the circle. For the oscill…
Classification of incompatibility for two orthonormal bases
Jianwei Xu
For two orthonormal bases of a -dimensional complex Hilbert space, the notion of complete incompatibility was introduced recently by De Bièvre [Phys. Rev. Lett. 127, 190404 (202…
norm of coherence is not equal to its convex roof quantifier
Jianwei Xu
Since a rigorous framework for quantifying quantum coherence was established by Baumgratz et al. [T. Baumgratz, M. Cramer, and M. B. Plenio, Phys. Rev. Lett. 113, 140401 (2014)], m…
Estimating coherence with respect to general quantum measurements
Jianwei Xu, Lin Zhang, Shao-Ming Fei
The conventional coherence is defined with respect to a fixed orthonormal basis, i.e., to a von Neumann measurement. Recently, generalized quantum coherence with respect to general…
Single-photon-triggered spin squeezing with decoherence reduction in optomechanics via phase matching
Zhucheng Zhang, Lei Shao, Wangjun Lu +4
Quantum spin squeezing is an important resource for quantum information processing, but its squeezing degree is not easy to preserve in an open system with decoherence. Here, we pr…
Coherence measures with respect to general quantum measurements
Jianwei Xu, Lian-He Shao, Shao-Ming Fei
Quantum coherence with respect to orthonormal bases has been studied extensively in the past few years. Recently, Bischof, et al. [Phys. Rev. Lett. 123, 110402 (2019)] generalized…
Measuring orbital angular momentum of vortex beams in optomechanics
Zhucheng Zhang, Jiancheng Pei, Yi-Ping Wang +1
Measuring the orbital angular momentum (OAM) of vortex beams, including the magnitude and the sign, has great application prospects due to its theoretically unbounded and orthogona…
-symmetry-breaking enhanced cavity optomechanical magnetometry
Zhucheng Zhang, Yi-Ping Wang, Xiaoguang Wang
-symmetry-breaking enhanced cavity optomechanical magnetometer is proposed, which is achieved by monitoring the change of intensity of a nonlinear four-wave mixing (F…
Coherence of quantum channels
Jianwei Xu
We investigate the coherence of quantum channels and establish a resource theory for quantifying the coherence of quantum channels via Choi matrix. To this aim, we define the incoh…
Coherence measures based on sandwiched Rényi relative entropy
Jianwei Xu
Coherence is a fundamental ingredient for quantum physics and a key resource for quantum information theory. Baumgratz, Cramer, and Plenio established a rigorous framework (BCP fra…
Detecting macroscopic quantum coherence with a cavity optomechanical system
Qiang Zheng, Jianwei Xu, Yao Yao +1
The rigorous resource framework of quantum coherence has been set up recently and excited a wide variety of interests. Here we show that a quantum cavity optomechanical system, as…
Quantifying coherence of Gaussian states
Jianwei Xu
Coherence arises from the superposition principle and plays a key role in quantum mechanics. Recently, Baumgratz et al. [T. Baumgratz, M. Cramer, and M. B. Plenio, Phys. Rev. Lett.…
Multipartite fully entangled fraction
Jianwei Xu
Fully entangled fraction is a definition for bipartite states, which is tightly related to bipartite maximally entangled states, and has clear experimental and theoretical signific…
What bipartite states are lazy
Jianwei Xu
A bipartite state is called lazy if the entropy rate of one subsystem is vanishing for any coupling to the other subsystem. In this paper, we provide a necessary and sufficient con…
Lazy states, discordant states and entangled states for 2-qubit systems
Jianwei Xu
We investigate the lazy states, entangled states and discordant states for 2-qubit systems. We show that many lazy states are discordant, many lazy states are entangled, and many m…