Abstract
We propose a robust and scalable scheme to generate an -qubit state among separated quantum nodes (cavity-QED systems) by using linear optics and postselections. The present scheme inherits the robustness of the Barrett-Kok scheme [S. D. Barrett and P. Kok, Phys. Rev. A 71, 060310(R) (2005)]. The scalability is also ensured in the sense that an arbitrarily large -qubit state can be generated with a quasipolynomial overhead . The process to breed the states, which we introduce to achieve the scalability, is quite simple and efficient and can be applied for other physical systems.
- Received 23 February 2011
DOI:https://doi.org/10.1103/PhysRevA.83.050303
©2011 American Physical Society