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Alpha decay energies and half-lives for possibly synthesized superheavy elements

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Chinese physics C 2008年第1期32卷 40-43页

作者：支启军任中洲张小平周小红甘再国秦芝徐瑚珊 department of physics Nanjing University institute of modern physics Chines Academy of Sciences

We investigate the ground state properties of some superheavy nuclei, which may be synthesized in future experiments. Special emphases are placed on the alpha decay energies and half-lives. The alpha decay energies and half-lives from different theoretical models are compared and discussed comprehensively. Through these calculations and comparisons, the optimal superheavy elements to be synthesized in future experiments are proposed theoretically.

关键词： synthesis superheavy element alpha decay energy haft-life

Quantum Discord Dynamics of Two Atoms Interacting with Two Quantized Field Modes through a Raman Interaction with Phase Decoherence

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Chinese physics Letters 2011年第7期28卷 35-38页

作者： QIAN Yi XU Jing-Bo Zhejiang institute of modern physics and department of physics Zhejiang UniversityHangzhou 310027

We investigate the quantum discord dynamics of two effective two-level atoms independently interacting with two quantized field modes through a Raman interaction in the presence of phase *** influence of the phase decoherence and detuning on the evolution of the quantum discord and entanglement between two atoms is *** is found that the quantum discord is more robust than the entanglement under the phase decoherence,and the amount of discord and entanglement between two atoms can be increased by adjusting the detuning.

关键词： quantum independently phase

Effects of Periodic Forcing Amplitude on the Spiral Wave Resonance Drift

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Chinese physics Letters 2006年第8期23卷 2030-2033页

作者：吴宁杰李炳伟应和平 Zhejiang institute of modern physics and department of physics Zhejiang University Hangzhou 310027

We study dynamics of spiral waves under a uniform periodic temporal forcing in an excitable medium. With a specific combination of frequency and amplitude of the external periodic forcing, a resonance drift of a spiral wave occurs along a straight line, and it is accompanied by a complicated ‘flower-like＇ motion on each side of this bifurcate boundary line. It is confirmed that the straight-line drift frequency of spiral waves is not locked to the nature rotation frequency as the forcing amplitude expends are further verified numerically for a simplified kinematical the range of the spiral wave frequency. These results model.

关键词： EXCITABLE MEDIA CARDIAC FIBRILLATION DYNAMICS TRANSITION KINEMATICS TURBULENCE PATTERNS MODEL

Identifying the closeness of eigenstates in quantum many-body systems

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Chinese physics B 2017年第8期26卷 66-73页

作者：李海彬杨扬王沛王晓光 department of Applied physics Zhejiang University of Technology department of physics Zhejiang Normal University Zhejiang institute of modern physics Department of Physics Zhejiang University

We propose a quantity called modulus fidelity to measure the closeness of two quantum pure states. We use it to investigate the closeness of eigenstates in one-dimensional hard-core bosons. When the system is integrable, eigenstates close to their neighbor or not, which leads to a large fluctuation in the distribution of modulus fidelity. When the system becomes chaos, the fluctuation is reduced dramatically, which indicates all eigenstates become close to each other. It is also found that two kind of closeness, i.e., closeness of eigenstates and closeness of eigenvalues, are not correlated at integrability but correlated at chaos. We also propose that the closeness of eigenstates is the underlying mechanism of eigenstate thermalization hypothesis （ETH） which explains the thermalization in quantum many-body systems.

关键词： quantum chaos thermalization fidelity

One Atom in an Optical Cavity： Entanglement and Applications to Quantum Computation

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Chinese physics Letters 2008年第1期25卷 24-26页

作者：张建松许晶波 Zhejiang institute of modern physics and department of physics Zhejiang University Hangzhou 310027

We propose a scheme to implement two-bit .quantum phase gates and one-bit unitary gates by using the two- mode two-photon Jaynes Cummings model. The entanglement between the atom and cavity is also investigated in the presence of phase decoherence. It is found that there is stationary entanglement that is sensitive with the detuning

关键词： INTRINSIC DECOHERENCE PHASE GATE IONS

Chaos and quantum Fisher information in the quantum kicked top

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Chinese physics B 2011年第5期20卷 199-203页

作者：王晓茜马健张喜和王晓光 department of physics Changchun University of Science and Technology Zhejiang institute of modern physics Department of PhysicsZhejiang University

Quantum Fisher information is related to the problem of parameter estimation. Recently, a criterion has been proposed for entanglement in multipartite systems based on quantum Fisher information. This paper studies the behaviours of quantum Fisher information in the quantum kicked top model, whose classical correspondence can be chaotic. It finds that, first, detected by quantum Fisher information, the quantum kicked top is entangled whether the system is in chaotic or in regular case. Secondly, the quantum Fisher information is larger in chaotic case than that in regular case, which means, the system is more sensitive in the chaotic case.

关键词： quantum information quantum kicked top quantum Fisher information quantum chaos

Dynamical decoupling pulses on the quantum correlations for the system of superconducting quantum circuit

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Chinese physics B 2015年第11期24卷 98-102页

作者：王冬梅钱懿许晶波俞攸红 Zhejiang institute of modern physics and physics department Zhejiang University Applied physics department Zhejiang University of Technology

We investigate the influence of the dynamical decoupling pulses on the quantum correlations in a superconducting system consisting of two noninteracting qubits interacting with their own data buses. It is found that the geometric discord and entanglement between the two superconducting qubits can be increased by applying a train of zc-phase pulses. We then proceed to explore how the decoupling pulses affect the quantum transfer of information between the two superconducting qubits by makin~ use of the chance of trace distance.

关键词： quantum correlations superconducting qubits decoupling

Projection Operator on Rational Noncommutative Orbifold T^2/Z_4

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Communications in Theoretical physics 2011年第7期56卷 107-118页

作者：冯俊杨战营张凯侯伯宇石康杰 institute of modern physics Northwest University department of physics Northwest University

In this paper, we introduce the reduced matrix in kq representation and provide the reduced matrix elements of a projection operator P on the rational noncommutative orbifold T^2/Z_*** give the closed form for the projector by Jacobi elliptical functions. Since projectors correspond to soliton solutions of the field theory on the noncommutative orbifold, we thus present a corresponding soliton solution.

关键词： soliton projection operator noncommutative orbifold T2/Z4

Dynamics of Controllable Optical Rogue Waves in Presence of Quintic Nonlinearity and Nonlinear Dispersion Effects

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Communications in Theoretical physics 2014年第11期61卷 701-706页

作者：马笑霄赵立臣刘冲杨战营杨文力 department of physics Northwest University institute of modern physics Northwest University

We analytically study optical rogue waves in the presence of quintic nonlinearity and nonlinear dispersion effects. Dynamics of the rogue waves are investigated through the precise expressions of their peak, valley, trajectory,and width. Based on this, the properties of a few specific rogue waves are demonstrated in detail, and the dynamical evolution of rogue waves can be well controlled under different nonlinearity management. It shows that the peak reaches its maximum and the valley becomes minimized when the width evolves to the minimum value. Moreover, we find that the higher-order effects here achieve balance due to the integrability, and they only influence the rogue waves' trajectory.

关键词： rogue waves dynamics property higher-order effects nonlinearity management