Controllable Amplification of Entanglement for Two Qutrits under Decoherence

Abstract

Entanglement dynamics of a two-qutrit Heisenberg spin chain with the external magnetic fields and DM interaction under the intrinsic decoherence is investigated. Depending on whether there is inhomogeneous magnetic field, the entanglement amplification, i.e. the phenomenon that the finally stable entanglement is bigger than that of the initial one, is found for one kind of initial states. The reasons for the controllable entanglement amplification are discussed.

Distillability sudden death in two-qutrit systems with external magnetic field and Dzyaloshinskii-Moriya interaction due to decoherence

“…The DM interaction which is arisen from spin-orbit coupling [18], plays the role to quantum entanglement dynamics [19][20][21]. Besides, possessing external magnetic field B 0 , a parameter b which controls the inhomogeneity of B 0 , and the bilinear interaction between qubits effect on the bipartite entanglement dynamics in isotropic Heisenberg spin chains have been formulated and studied in detail [22,23].…”

Thermal Entanglement in Two-Qutrit Heisenberg XX Chain with Different Dzyaloshinskii—Moriya Interaction and Nonuniform Magnetic Field

“…Owing to many meaningful applications of high spin quantum systems, the entanglement in spin-1 Heisenberg chain has been widely studied. [10,17] But the entanglement in spin-1 system with different DM interaction and the comparison between the different DM interaction have never been reported. These are the motivations of this study.…”