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- Chinese University of Hong KongHK3 papers
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- Chongqing Three Gorges UniversityCN1 paper
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9 papers · 1 filter
Quench Dynamics of Entanglement in an Opened Anisotropic Spin-1/2 Heisenberg Chain
Jie Ren, Shiqun Zhu
The quantum entanglement dynamics of a one-dimensional spin-1/2 anisotropic XXZ model is studied using the method of the adaptive time-dependent density-matrix renormalization-grou…
Entanglement, fidelity, and quantum phase transition in antiferromagnetic-ferromagnetic alternating Heisenberg chain
Jie Re, Shiqun Zhu
The fidelity and entanglement entropy in an antiferromagnetic-ferromagnetic alternating Heisenberg chain are investigated by using the method of density-matrix renormalization-grou…
Fidelity and entanglement close to quantum phase transition in a two-leg spin ladder
Jie Ren, Shiqun Zhu
The fidelity susceptibility and entanglement entropy in a system of two-leg spin ladder with rung coupling is investigated by using exact diagonalization of the system. The e…
Entanglement in a Dimerized Antiferromagnetic Heisenberg Chain
Xiang Hao, Shiqun Zhu
The entanglement properties in an antiferromagnetic dimerized Heisenberg spin-1/2 chain are investigated. The entanglement gap, which is the difference between the ground-state ene…
Entanglement in a hardcore-boson Hubbard model
Xiang Hao, Shiqun Zhu
The entanglement in a Hubbard chain of hardcore bosons is investigated. The analytic expression of the global entanglement in ground state is derived. The divergence of the derivat…
Quantum information processing in a spin-bus system of coupled chains
Xiang Hao, Shiqun Zhu
The effective Heisenberg interaction of long distance is constructed in spin qubits connected to a bus of two strongly coupled chains. Universal quantum computation can be realized…