dorsal/arxiv
View SchemaThermal and ground-state entanglement in Heisenberg XX qubit rings
| Authors | Xiaoguang Wang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0203141 |
| URL | https://arxiv.org/abs/quant-ph/0203141 |
| DOI | 10.1103/PhysRevA.66.034302 |
| Journal | Phys. Rev. A 66, 034302 (2002). |
Abstract
We study the entanglement of thermal and ground states in Heisernberg $XX$ qubit rings with a magnetic field. A general result is found that for even-number rings pairwise entanglement between nearest-neighbor qubits is independent on both the sign of exchange interaction constants and the sign of magnetic fields. As an example we study the entanglement in the four-qubit model and find that the ground state of this model without magnetic fields is shown to be a four-body maximally entangled state measured by the $N$-tangle.
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"abstract": "We study the entanglement of thermal and ground states in Heisernberg $XX$\nqubit rings with a magnetic field. A general result is found that for\neven-number rings pairwise entanglement between nearest-neighbor qubits is\nindependent on both the sign of exchange interaction constants and the sign of\nmagnetic fields. As an example we study the entanglement in the four-qubit\nmodel and find that the ground state of this model without magnetic fields is\nshown to be a four-body maximally entangled state measured by the $N$-tangle.",
"arxiv_id": "quant-ph/0203141",
"authors": [
"Xiaoguang Wang"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1103/PhysRevA.66.034302",
"journal_ref": "Phys. Rev. A 66, 034302 (2002).",
"title": "Thermal and ground-state entanglement in Heisenberg XX qubit rings",
"url": "https://arxiv.org/abs/quant-ph/0203141"
},
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