12 research outputs found
Non-locality of high-dimensional two-photon orbital angular momentum states
Quantum Matter and Optic
How to observe high-dimensional two-photon entanglement with only two detectors
Quantum Matter and Optic
Effect of spatial filtering on the Schmidt decomposition of entangled photons
Quantum Matter and Optic
Angular phase plate analyzers for measuring the dimensionality of multi-mode fields
Quantum Matter and Optic
Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems
The measurement of high-dimensional entangled states of orbital angular
momentum prepared by spontaneous parametric down-conversion can be considered
in two separate stages: a generation stage and a detection stage. Given a
certain number of generated modes, the number of measured modes is determined
by the measurement apparatus. We derive a simple relationship between the
generation and detection parameters and the number of measured entangled modes.Comment: 6 pages, 4 figure
Laser with thresholdless intensity fluctuations
We have studied the quantum-noise properties of a small slow-inversion laser experimentally and theoretically. As a function of pump rate, the average output intensity shows a sharp threshold, but the intensity fluctuations do not. Under quite generic conditions the intensity fluctuations of a sufficiently small slow-inversion laser show highly super-Poissonian statistics (even two times above threshold), due to the very weak damping of the spontaneous-emission-driven relaxation oscillation