Entanglement across a separation in spin chains: statics & dynamics

          @misc{ scivideos_PIRSA:10050068,
            doi = {10.48660/10050068},
            url = {https://pirsa.org/10050068},
            author = {Bose, Sougato},
            keywords = {},
            language = {en},
            title = {Entanglement across a separation in spin chains: statics \& dynamics},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2010},
            month = {may},
            note = {PIRSA:10050068 see, \url{https://scivideos.org/index.php/pirsa/10050068}}
          }
          

Abstract

In this talk, I will present two schemes which would result in substantial entanglement between distant individual spins of a spin chain. One relies on a global quench of the couplings of a spin chain, while the other relies on a bond quenching at one end. Both of the schemes result in substantial entanglement between the ends of a chain so that such chains could be used as a quantum wire to connect quantum registers. I will also examine the resource of entanglement already existing between separated parts of a many-body system at criticality as the size of the parts and their separation is varied. This form of entanglement displays an interesting scale invariance.