Can entanglement be extracted from many body systems?

Author(s): G. D. Chiara, Č. Brukner, G. M. Palma, R. Fazio, V. Vedral

Journal: International Journal of Quantum Information

Volume: 5

Page(s): 125

Year: 2007

DOI Number: 10.1142/S021974990700258X

Link: Link to publication

Abstract:

Some thermodynamical properties of solids, such as heat capacity and magnetic susceptibility, have recently been shown to be linked to the amount of entanglement in a solid. Until now, however, it was not clear whether this entanglement can be used as a resource in quantum information theory. Here we show that this entanglement is physical, demonstrating the principles of its extraction from a typical spin chain by scattering two particles off the system. Moreover, we show how to simulate this process using present-day optical lattice technology.