Abstract
The continuous-variable orbital angular momentum squeezed states is a crucial resource in the implementation of quantum precise measurement, super-resolution quantum imaging, and quantum storage. Currently, only the lower-order orbital angular momentum squeezed states can be generated by an optical parametric oscillator. However, the higher-order orbital angular momentum squeezed states are more useful for reliable quantum information processing. Here, we use a vortex plate to generate a series of higher-order orbital angular momentum squeezed states. The measured 20th-order orbital angular momentum squeezing is − 3.5 dB. The method may find important applications in high-dimensional quantum information processing and high-capacity quantum communication networks.
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