Search results for: Wu-Ming Liu

Items from 1 to 20 out of 24 results

article

Reservoir Engineering Strong Magnomechanical Entanglement via Dual‐Mode Cooling

Zhi‐Qiang Liu, Yun Liu, Lei Tan, Wu‐Ming Liu

Annalen der Physik > 535 > 5 > n/a - n/a

A hybrid cavity magnomechanical system to transfer the bipartite entanglements and achieve the strong microwave photon–phonon entanglement based on the reservoir engineering approach is constructed. The magnon mode is coupled to the microwave cavity mode via magnetic dipole interaction and to the phonon mode via magnetostrictive force (optomechanical‐like). It is shown that the initial magnon‐phonon...

article

Enhanced Charging in Common Environments Compared to Independent Environments for Two‐Level Systems

Kai Xu, Jin‐Jun Chen, Hong‐Guo Li, Hao Zhu, more

Annalen der Physik > 535 > 1 > n/a - n/a

The charging process of a quantum battery (i.e., a two‐level system) is studied in two scenarios, that is, a quantum battery and a charger are coupled to the common reservoir environments or coupled to their respective independent environments. In the common reservoir scenario, it is shown that the optimal charging process can be realized by increasing the number of environments and setting the same...

article

Multipartite Entanglement Structure Resolution Analyzer Based on Quantum‐Control‐Assisted Multipartite Uncertainty Relation

Xiao Zheng, Shao‐Qiang Ma, Guo‐Feng Zhang, Heng Fan, more

Annalen der Physik > 533 > 6 > n/a - n/a

By constructing a quantum‐control‐assisted multipartite uncertainty relation, a general and efficient multipartite entanglement structure resolution analyzer is provided for all pure states with arbitrary number of parties in arbitrary finite dimension. The lower bounds of this multipartite uncertainty relation present different spectra for different multipartite entanglement structures, and they...

article

Management of modulated wave solitons in a two-dimensional nonlinear transmission network

Emmanuel Kengne, Wu-Ming Liu

The European Physical Journal B > 2019 > 92 > 10 > 1-15

Based on a modified one-dimensional Noguchi electrical transmission network containing a linear dispersive element C_S with a voltage source and a one-dimensional series capacitor transmission network, we build a two-dimensional nonlinear discrete electrical network which allow the wave propagation in both the longitudinal and the transverse direction. These transmission lines are coupled to one another...

article

Non-autonomous solitons in inhomogeneous nonlinear media with distributed dispersion

Emmanuel Kengne, Ahmed Lakhssassi, Wu-Ming Liu

Nonlinear Dynamics > 2019 > 97 > 1 > 449-469

We show that the methodology based on the powerful method of the so-called hidden symmetry reductions (HSR) provides a systematic way to analytically derive non-autonomous temporal soliton solutions of a one-dimensional inhomogeneous nonlinear Schrödinger equation with a linear gain or loss, a linear density profile, and distributed dispersion. The fundamental innovation of our approach is to notice...

article

Plasma-etched, S-doped graphene for effective hydrogen evolution reaction

Ye Tian, Zhen Wei, Xuejun Wang, Shuo Peng, more

International Journal of Hydrogen Energy > 2017 > 42 > 7 > 4184-4192

Heteroatom-doped graphene as highly efficient metal-free electrocatalyst is emerging as the most promising alternative to Pt-based electrocatalysts for hydrogen evolution reaction (HER). However, developing heteroatom-doped graphene with competitive HER activity remains a great challenge. Here, we reported an effective strategy to employ plasma-etching method to create more topological defects on...

article

Topological defect formation in rotating binary dipolar Bose–Einstein condensate

Xiao-Fei Zhang, Wei Han, Hai-Feng Jiang, Wu-Ming Liu, more

Annals of Physics > 2016 > 375 > C > 368-377

We investigate the topological defects and spin structures of a rotating binary Bose–Einstein condensate, which consists of both dipolar and scalar bosonic atoms confined in spin-dependent optical lattices, for an arbitrary orientation of the dipoles with respect to their plane of motion. Our results show that the tunable dipolar interaction, especially the orientation of the dipoles, can be used...

article

Dynamics and stability of stationary states for the spin-1 Bose–Einstein condensates in a standing light wave

Deng-Shan Wang, Wei Han, Yuren Shi, Zaidong Li, more

Communications in Nonlinear Science and Numerical Simulation > 2016 > 36 > C > 45-57

The spin-1 Bose–Einstein condensates trapped in a standing light wave can be described by three coupled Gross–Pitaevskii equations with a periodic potential. In this paper, nine families of stationary solutions without phase structures in the form of Jacobi elliptic functions are proposed, and their stabilities are analyzed by both linear stability analysis and dynamical evolutions. Taking the ferromagnetic...

article

Engineering bright solitons to enhance the stability of two-component Bose–Einstein condensates

R. Radha, P.S. Vinayagam, J.B. Sudharsan, Wu-Ming Liu, more

Physics Letters A > 2015 > 379 > 45-46 > 2977-2983

We consider a system of coupled Gross–Pitaevskii (GP) equations describing a binary quasi-one-dimensional Bose–Einstein condensate (BEC) with intrinsic time-dependent attractive interactions, placed in a time-dependent expulsive parabolic potential, in a special case when the system is integrable (a deformed Manakov's system). Since the nonlinearity in the integrable system which represents binary...

article

Tunable topological quantum states in three- and two-dimensional materials

Ming Yang, Xiao-Long Zhang, Wu-Ming Liu

Frontiers of Physics > 2015 > 10 > 2 > 161-176

We review our theoretical advances in tunable topological quantum states in three- and two-dimensional materials with strong spin-orbital couplings. In three-dimensional systems, we propose a new tunable topological insulator, bismuth-based skutterudites in which topological insulating states can be induced by external strains. The orbitals involved in the topological band-inversion process...

article

Quantum tunneling of ultracold atoms in optical traps

Jian-Hua Wu, Ran Qi, An-Chun Ji, Wu-Ming Liu

Frontiers of Physics > 2014 > 9 > 2 > 137-152

We review our theoretical advances in quantum tunneling of Bose-Einstein condensates in optical traps and in microcavities. By employing a real physical system, the frequencies of the pseudo Goldstone modes in different phases between two optical traps are studied respectively, which are the crucial feature of the non-Abelian Josephson effect. When the optical lattices are under gravity, we investigate...

article

Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells

Xiao-Qing Luo, Deng-Long Wang, Yan-Chao She, Heng Fan, more

The European Physical Journal D > 2014 > 68 > 4 > 1-9

We investigate theoretically both the linear and nonlinear properties of the probe and signal optical pulsed fields in a system of four-level coupled GaAs/AlGaAs quantum wells with spontaneous decay of the longitudinal optical phonons (SDLOP) between the lower excited state and the ground state levels. In the linear range, we predict the existence of electromagnetically induced absorption (EIA), and...

article

Ground states, solitons and spin textures in spin-1 Bose-Einstein condensates

Shu-Wei Song, Lin Wen, Chao-Fei Liu, S. -C. Gou, more

Frontiers of Physics > 2013 > 8 > 3 > 302-318

We present an overview of our recent theoretical studies on the quantum phenomena of the spin-1 Bose-Einstein condensates, including the phase diagram, soliton solutions and the formation of the topological spin textures. A brief exploration of the effects of spin-orbit coupling on the ground-state properties is given. We put forward proposals by using the transmission spectra of an optical cavity...

article

Modulational instability of Bose-Einstein condensate in a complex polynomial in elliptic Jacobian functions potential

Emmanuel Kengne, Ahmed Lakhssassi, Remi Vaillancourt, Wu-Ming Liu

The European Physical Journal B > 2013 > 86 > 5 > 1-15

We consider a Gross-Pitaevskii (GP) equation with cubic-quintic nonlinearities, which governs the dynamics of Bose-Einstein condensates (BECs) matter waves with time-dependent complex potential in Jacobian elliptic functions. The complex term of the potential accounts for either the atomic feeding or the atomic loss of the condensate. Based on a special variable transformation, an integrable condition...

article

On the propagation of nonlinear signals in nonlinear transmission lines

Emmanuel Kengne, Ahmed Lakhssassi, Remi Vaillancourt, Wu-Ming Liu

The European Physical Journal Plus > 2013 > 128 > 6 > 1-17

. A quintic nonlinear Schrödinger (NLS) equation, with derivative cubic terms, that governs the propagation of nonlinear signals in a nonlinear transmission line (NLTL) is considered. By combining a special phase-imprint transformation with a modified lens transformation, we reduce the equation under consideration to a standard cubic NLS equation with a time-varying gain/loss term and obtain the integrability...

article

Quantum correlation dynamics of two qubits in noisy environments: The factorization law and beyond

Guo-Feng Zhang, Ai-Ling Ji, Heng Fan, Wu-Ming Liu

Annals of Physics > 2012 > 327 > 9 > 2074-2084

We investigate the quantum correlations of two qubits under conditions of single-sided and two-sided noisy channels when the initial state of the system belongs to a subclass of X structured ones in terms of measurement-induced nonlocality, measurement-induced disturbance and quantum discord. The results show that measurement-induced nonlocality has a factorization law, regardless of whether there...

article

Thermal-assisted anisotropy and anisotropy-driven instability in the superfluid state of two-species fermionic polar molecules

Renyuan Liao, Zhi-Gao Huang, Wei-feng Yang, Wu-Ming Liu

Physics Letters A > 2012 > 376 > 26-27 > 1986-1991

We study the superfluid state of two-species heteronuclear Fermi gases with isotropic contact and anisotropic long-range dipolar interactions. We find that the temperature tends to increase the anisotropy of the pairing state, which is rather counterintuitive. We study the anisotropic properties of the system by examining the angular dependence of the number density distribution, the excitation spectrum...

article

Quantum phase transition of cold atoms trapped in optical lattices

Yao-hua Chen, Wei Wu, Guo-cai Liu, Hong-shuai Tao, more

Frontiers of Physics > 2012 > 7 > 2 > 223-234

We review our recent theoretical advances in phase transition of cold atoms in optical lattices, such as triangular lattice, honeycomb lattice, and Kagomé lattice. By employing the new developed numerical methods called dynamical cluster approximation and cellular dynamical mean-field theory, the properties in different phases of cold atoms in optical lattices are studied, such as density of states,...

article

Quantum correlations in spin models

Guo-Feng Zhang, Heng Fan, Ai-Ling Ji, Zhao-Tan Jiang, more

Annals of Physics > 2011 > 326 > 10 > 2694-2701

Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by the use of measurement-induced disturbance (MID) [S. Luo, Phys. Rev. A 77 (2008) 022301] and geometric measure of quantum discord (GQD)...

article

Dynamics of Bose-Einstein condensates near Feshbach resonance in external potential

Xiao-fei Zhang, Xing-hua Hu, Deng-shan Wang, Xun-xu Liu, more

Frontiers of Physics > 2011 > 6 > 1 > 46-60

We review our recent theoretical advances in the dynamics of Bose-Einstein condensates with tunable interactions using Feshbach resonance and external potential. A set of analytic and numerical methods for Gross-Pitaevskii equations are developed to study the nonlinear dynamics of Bose-Einstein condensates. Analytically, we present the integrable conditions for the Gross-Pitaevskii equations with...

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INFONA - science communication portal

Search results for: Wu-Ming Liu

Reservoir Engineering Strong Magnomechanical Entanglement via Dual‐Mode Cooling

Enhanced Charging in Common Environments Compared to Independent Environments for Two‐Level Systems

Multipartite Entanglement Structure Resolution Analyzer Based on Quantum‐Control‐Assisted Multipartite Uncertainty Relation

Management of modulated wave solitons in a two-dimensional nonlinear transmission network

Non-autonomous solitons in inhomogeneous nonlinear media with distributed dispersion

Plasma-etched, S-doped graphene for effective hydrogen evolution reaction

Topological defect formation in rotating binary dipolar Bose–Einstein condensate

Dynamics and stability of stationary states for the spin-1 Bose–Einstein condensates in a standing light wave

Engineering bright solitons to enhance the stability of two-component Bose–Einstein condensates

Tunable topological quantum states in three- and two-dimensional materials

Quantum tunneling of ultracold atoms in optical traps

Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells

Ground states, solitons and spin textures in spin-1 Bose-Einstein condensates

Modulational instability of Bose-Einstein condensate in a complex polynomial in elliptic Jacobian functions potential

On the propagation of nonlinear signals in nonlinear transmission lines

Quantum correlation dynamics of two qubits in noisy environments: The factorization law and beyond

Thermal-assisted anisotropy and anisotropy-driven instability in the superfluid state of two-species fermionic polar molecules

Quantum phase transition of cold atoms trapped in optical lattices

Quantum correlations in spin models

Dynamics of Bose-Einstein condensates near Feshbach resonance in external potential

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