Thermal entanglement in one-dimensional heisenberg quantum spin chains under magnetic fields | |
Gong, Shou-Shu; Su, Gang | |
刊名 | Physical review a |
2009-07-01 | |
卷号 | 80期号:1页码:5 |
ISSN号 | 1050-2947 |
DOI | 10.1103/physreva.80.012323 |
通讯作者 | Su, gang(gsu@gucas.ac.cn) |
英文摘要 | The thermal pairwise entanglement (te) of the s=1/ 2 xy chain in a transverse magnetic field is exactly resolved by means of the jordan-wigner transformation in the thermodynamic limit n ->infinity. it is found that the te vanishes at a fixed point with temperature t(c)similar or equal to 0.484 3j, which is independent of the magnetic field. a thermal quantity is proposed to witness the entangled state. furthermore, the te of the s=1/ 2 antiferromagnetic-ferromagnetic (af-f) heisenberg chain is studied by the transfer-matrix renormalization-group method. the tes of the spins coupled by af and f interactions are found to behave distinctively. the vanishing temperature of the field-induced te of the spins coupled by f interactions is observed dependent on the magnetic field. the results are further confirmed and analyzed within a mean-field framework. |
WOS关键词 | MATRIX RENORMALIZATION-GROUP ; SYSTEMS ; CRYPTOGRAPHY ; CROSSOVER ; CHANNELS ; STATE ; S=1/2 |
WOS研究方向 | Optics ; Physics |
WOS类目 | Optics ; Physics, Atomic, Molecular & Chemical |
语种 | 英语 |
出版者 | AMER PHYSICAL SOC |
WOS记录号 | WOS:000268616900069 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2396651 |
专题 | 中国科学院大学 |
通讯作者 | Su, Gang |
作者单位 | Chinese Acad Sci, Grad Univ, Coll Phys Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Gong, Shou-Shu,Su, Gang. Thermal entanglement in one-dimensional heisenberg quantum spin chains under magnetic fields[J]. Physical review a,2009,80(1):5. |
APA | Gong, Shou-Shu,&Su, Gang.(2009).Thermal entanglement in one-dimensional heisenberg quantum spin chains under magnetic fields.Physical review a,80(1),5. |
MLA | Gong, Shou-Shu,et al."Thermal entanglement in one-dimensional heisenberg quantum spin chains under magnetic fields".Physical review a 80.1(2009):5. |
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