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Creating high-dimensional time-bin entanglement using mode-locked lasers. (English) Zbl 1152.81834
Summary: We present a new scheme to generate high dimensional entanglement between two photonic systems. The idea is based on parametric down conversion with a sequence of pump pulses generated by a mode-locked laser. We prove experimentally the feasibility of this scheme by performing a Franson-type Bell test using a 2-way interferometer with path-length difference equal to the distance between 2 pump pulses. With this experiment, we can demonstrate entanglement for a two-photon state of at least dimension $D=11$. Finally, we propose a feasible experiment to show a Fabry--Perot like effect for a high dimensional two-photon state.

81P68Quantum computation
81V80Applications of quantum theory to quantum optics
81-05Experimental papers (quantum theory)