There's still a bit of randomness to the process, but conservation of momentum requires that the pairs come out on opposite sides of a cone around the original laser beam, allowing you to put two detectors in exactly the right place to catch the photons.
The trick is to add a dash of randomness to the process, they report in a paper to be published in Physical Review Letters.
Taking into account influential factors, e.g., resource, spatial condition, and the randomness of the construction process, the installation process of the steel-structure was simulated and optimized by using genetic algorithm (GA) optimization methodology.
Some might argue that it's normal for people, especially those using donor services, to want their child to look like them, but for others the idea of taking the randomness out of the process, of choosing a child based on appearance, is creepy or downright wrong.
Sediment introduces randomness to the process, resulting in different structures.
This heterogeneity influences common measurements of the randomness of the polymerization process.
In addition, this paper proposes extending the randomness of the sampling process to the time domain, in order to avoid the strong synchronization requirements that sensor nodes should satisfy if they had to generate and transmit their readings periodically.
