We present a study of the entanglement of formation for one-dimensional magnetic systems with defects. The concurrence was used as a measure of entanglement. Rather than locating the impurity at one site in the chain, there is a Gaussian distribution of disorder near a particular location. We demonstrate that the entanglement can be tuned by varying the strength of the external magnetic field and the distribution of impurities. The concurrence is a maximum close to the critical point, where a quantum phase transition occurs, and for certain parameters can be tuned to zero above the critical point.
|Number of pages||9|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - 1 Mar 2004|
- Entanglement of formation
- Magnetic systems
ASJC Scopus subject areas
- Physics and Astronomy(all)