Van den Nest, Maarten Theory, Max Planck Institute of Quantum Optics, Max Planck Society;
Cai, J. M., Dür, W., Van den Nest, M., Miyake, A., & Briegel, H. J. (2009). Quantum Computation in Correlation Space and Extremal Entanglement. Physical Review Letters, 103(5): 050503. doi:10.1103/PhysRevLett.103.050503.