Thermal entanglement of spins in an inhomogeneous magnetic field
نویسندگان
چکیده
منابع مشابه
4 Thermal entanglement of spins in a nonuniform magnetic field
We study the effect of nonuniformities in the magnetic field on the thermal entanglement of a two spin system. We show that in the ferromagnetic case a very small nonuniformity is capable to produce large values of thermal entanglement. In the antiferromagnetic case, nonuniformity only slightly raises the threshold temperature, but lowers the value of entanglement.
متن کاملThermal entanglement of spins in mean-field clusters
We determine thermal entanglement in mean field clusters of N spin one-half particles interacting via the anisotropic Heisenberg interaction, with and without external magnetic field. For the xxx cluster in the absence of magnetic field we prove that only the N = 2 ferromagnetic cluster shows entanglement. An external magnetic field B can only entangle xxx anti-ferromagnetic clusters in certain...
متن کاملua nt - p h / 04 07 07 3 v 3 2 5 N ov 2 00 4 Thermal entanglement of spins in an inhomogeneous magnetic field
We study the effect of inhomogeneities in the magnetic field on the thermal entanglement of a two spin system. We show that in the ferromagnetic case a very small inhomogeneity is capable to produce large values of thermal entanglement. This shows that the absence of entanglement in the ferromagnetic Heisenberg system is highly unstable against inhomogeneoity of magnetic fields which is inevita...
متن کاملEntanglement in the XZ spin chain model in the external magnetic field
The entanglement at zero-temperature is studied in a two-qubit XZ spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. We have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. It is shown that the ground state of thesystem depends on the strength of exchange coupling. We have shown that the analytical relation oft...
متن کاملEntanglement dynamics for two spins in an optical cavity - field interaction induced decoherence and coherence revival.
We in this paper study quantum correlations for two neutral spin-particles coupled with a single-mode optical cavity through the usual magnetic interaction. Two-spin entangled states for both antiparallel and parallel spin-polarizations are generated under the photon coherent-state assumption. Based on the quantum master equation we derive the time-dependent quantum correlation of Clauser-Horne...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.71.022308