selection rule

American  

noun

Physics.

1. any of several rules designating allowed transitions between quantum states in terms of the quantum numbers associated with the states.

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Example Sentences

The team further elucidated the ferromagnetic and anti-ferromagnetic phase selection rule of magnetic interactions by analyzing the relative orientation of magnetic moments between nearest-neighbour and next-nearest neighbour sites.

From Science Daily

Both Monye and Care believe the selection rule could be relaxed for a short-term period until English rugby gets back on its feet financially.

From BBC

They also wanted Wales’ minimum 60-cap selection rule for players playing outside the country to be scrapped, and a voice at meetings of the PRB.

From Seattle Times

They also want Wales’ minimum 60-cap selection rule for players playing outside the country to be scrapped, and a voice at meetings of the Professional Rugby Board.

From Seattle Times

A place at PRB meetings, the removal of the contentious 60-cap selection rule in Wales and a rethink over the contracts on offer because of the fixed-variable elements accounting for 20% of salaries.

From BBC