Electromagnetically Induced Transparency in Circuit Quantum Electrodynamics with Nested Polariton States.

Quantum networks will enable extraordinary capabilities for communicating and processing quantum information. These networks require a reliable means of storage, retrieval, and manipulation of quantum states at the network nodes. A node receives one or more coherent inputs and sends a conditional output to the next cascaded node in the network through a quantum channel.

Accurate and practical method for characterizing Laguerre-Gaussian modes.

We propose a new parameter, Q(p,l)(2), based on cross-sectional intensity distribution to distinguish Laguerre-Gaussian (LG) beams. Theoretically, Q(p,l)(2) shows an approximately linear dependence on the topological index in higher LG modes. Compared with the similar parameter Q(p,l) proposed by Long et al.

Evaluating Laguerre-Gaussian beams with an invariant parameter.

We define a new parameter for Laguerre-Gaussian (LG) beams, named Q(p,l), which is only related to mode indices p and l. This parameter is able to distinguish and evaluate LG beams. The Q(p,l) values are first calculated theoretically and then measured experimentally for several different LG beams.