8 papers · 1 filter
Controlled multiqubit entangled states and quantum transmission in quantum molecule-spin systems
Xiang Hao, Tao Pan, Taocheng Zang +1
he multiqubit entangled states are coherently controlled in the quantum spin systems composed of interacting antiferromagnetic molecular rings. The tunable intermolecular cou…
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…
Swap Action in a Solid-State Controllable Anisotropic Heisenberg Model
Xiang Hao, Shiqun Zhu
Correct swap action can be realized via the control of the anisotropic Heisenberg interaction in solid-state quantum systems. The conditions of performing a swap are derived by the…
Quantum computation in semiconductor quantum dots of electron-spin asymmetric anisotropic exchange
Xiang Hao, Shiqun Zhu
The universal quantum computation is obtained when there exists asymmetric anisotropic exchange between electron spins in coupled semiconductor quantum dots. The asymmetric Heisenb…