Multi-photon entanglement from distant single photon sources on demand
Almut Beige, Yuan Liang Lim, Christian Schön · Journal of Modern Optics · 2007
We describe a scheme that allows for the generation of any desired N-photon state on demand. Under ideal conditions, this requires only N single photon sources, laser pulses and linear optics elements. First, the sources should be initialized with the help of single-qubit rotations and repeat-until-success two-qubit quantum gates [Y.L. Lim, A. Beige and L.C. Kwek, Phys. Rev. Lett. 95 030505 (2005).]. Afterwards, the state of the sources can be mapped onto the state of N newly generated photons whenever needed.