Entanglement dynamics in finite qudit chain in consistent magnetic field

Autor:	Ivanchenko, E. A.
Rok vydání:	2013
Předmět:	Quantum Physics
Zdroj:	International Journal of Quantum Information Vol. 10, No. 6 (2012) 1250068 (13 pages)
Druh dokumentu:	Working Paper
DOI:	10.1142/S0219749912500682
Popis:	Based on the Liouville-von Neumann equation, we obtain a closed system of equations for the description of a qutrit or coupled qutrits in an arbitrary, time-dependent, external magnetic field. The dependence of the dynamics on the initial states and the magnetic field modulation is studied analytically and numerically. We compare the relative entanglement measure's dynamics in bi-qudits with permutation particle symmetry. We find the magnetic field modulation which retains the entanglement in the system of two coupled qutrits. Analytical formulae for the entanglement measures in finite chains from 2 to 6 qutrits or 3 quartits are presented. Comment: 12 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:1106.2297
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1302.0105 Zobrazit plný text záznamu View this record from Arxiv