Exploring the tripartite entanglement and quantum phase transition in the $$XXZ+h$$ X X Z + h model
| Autor: | Khalid Mohammed Khan, Wajid Joyia |
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| Rok vydání: | 2017 |
| Předmět: |
Quantum phase transition
Physics Heisenberg model Statistical and Nonlinear Physics Quantum Physics Quantum entanglement Squashed entanglement 01 natural sciences Multipartite entanglement 010305 fluids & plasmas Theoretical Computer Science Electronic Optical and Magnetic Materials Modeling and Simulation Quantum mechanics 0103 physical sciences Signal Processing Electrical and Electronic Engineering Quantum information 010306 general physics Entanglement witness Quantum computer |
| Zdroj: | Quantum Information Processing. 16 |
| ISSN: | 1573-1332 1570-0755 |
| Popis: | The behavior of bipartite and tripartite entanglement in Heisenberg $$XXZ+h$$ spins chain is investigated with the size of system using the approach of quantum renormalization group method. In thermodynamics limit, both types of entanglement exhibit quantum phase transition (QPT). The boundary of QPT links the phases of saturated entanglement and zero entanglement. The first derivative of both entanglements becomes discontinuous at the critical point, which corresponds to the second-order phase transition. Furthermore, the amount of saturated bipartite entanglement strongly depends on relative positions of spins, while tripartite entanglement is robust than bipartite entanglement. It turns out that the tripartite entanglement can be a better candidate than bipartite entanglement for analyzing QPT and implementing quantum information tasks. |
| Databáze: | OpenAIRE |
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