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quant-ph2004
Direct measurement of superluminal group velocity and of signal velocity in an optical fiber
Nicolas Brunner, Valerio Scarani, Mark Wegmuller +2
We present an easy way of observing superluminal group velocities using a birefringent optical fiber and other standard devices. In the theoretical analysis, we show that the optic…
quant-ph2004
Distribution of time-bin qubits over 50 km of optical fiber
I. Marcikic, H. de Riedmatten, W. Tittel +3
We report experimental distribution of time-bin entangled qubits over 50 km of optical fibers. Using actively stabilized preparation and measurement devices we demonstrate violatio…