Author(s)

C. M. Chandrashekar, Sandeep K. Goyal, Subhashish Banerjee

Indian Institute of Technology, Jodhpur, India.
Optics & Quantum Information Group, the Institute of Mathematical Sciences, Chennai, India.

We present a scheme for generating entanglement between two spatially separated systems from the spatial entanglement generated by the interference effect during the evolution of a single-particle quantum walk. Any two systems which can interact with the spatial modes entangled during the walk evolution can be entangled using this scheme. A notable feature is the ability to control the quantum walk dynamics and its localization at desired pair lattice sites irrespective of separation distance resulting in a substantial control and improvement in the entanglement output. Implementation schemes to entangle spatially separated atoms using quantum walk on a single atom is also presented.

Quantum Walk; Entanglement Generation; Localization

C. Chandrashekar, S. Goyal and S. Banerjee, "Entanglement Generation in Spatially Separated Systems Using Quantum Walk," Journal of Quantum Information Science, Vol. 2 No. 2, 2012, pp. 15-22. doi: 10.4236/jqis.2012.22004.