Use of quantum correlation: A theoretical and experimental perspective

Abstract

Recent interest in the field of quantum information processing has given rise to a flurry of theoretical as well as experimental activity, on entanglement, a purely quantum mechanical phenomenon. We briefly review quantification of entanglement and its use in carrying out quantum tasks like teleportation. The measures are primarily concerned with bipartite entanglement. Systems such as spin chains and quantum dots have been identified to execute some of these quantum protocols. Experimental realization of quantum networks, especially in the form of spin chains, has been dealt here, along with methods to extract the content of entanglement from experimental data. We explicate the effect of environment on quantum networks and how to extract quantum information before the system decoheres.