Ground-state entanglement in a three-spin transverse Ising model with energy current |
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| Authors: | Zhang Yong Liu Dan Long Gui-Lu |
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| Affiliation: | Key Laboratory For Quantum Information and Measurements and Department of Physics, Tsinghua University, Beijing 100084, China; Key Laboratory for Atomic and Molecular NanoSciences, Tsinghua University, Beijing 100084, China |
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| Abstract: | The ground-state entanglement associated with a three-spintransverse Ising model is studied. By introducing an energycurrent into the system, a quantum phase transition toenergy-current phase may be presented with the variation ofexternal magnetic field; and the ground-state entanglementvaries suddenly at the critical point of quantum phasetransition. In our model, the introduction of energy currentmakes the entanglement between any two qubits become maximallyrobust. |
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| Keywords: | entanglement energycurrent quantum phase transition |
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