Using a Double Copy Simplifies Quantum Gravity Calculations

In physics, calculating a predicted value for gravity at the particle level for a given event is difficult, but there appears to be a relationship between forces that enables a neat hack to simplify the calculation. By doubling the ‘kinematic term’ as if they were pairs of gravitons, you can make accurate predictions without calculating the strong force. When applied to Black Holes this also works—they act as if they were pairs of charged particles.

Could this be another type of symmetry in quantum forces?

Read How Gravity Is a Double Copy of Other Forces.

I’ve now written 1,000 notes since May 25, 2020 in my Zettelkasten. You can see my reflections on writing 500 notes and here are my thoughts since then.