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Equation 2 · Part 1 · How Much of Gravitationally Induced Entanglement Is in the Eye of the Frame

Symbol i

i,j∈{L,R}i,j \in \{L,R\}
ii

What this part means

i is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

i is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

…and mass B’s branches — and relational quantities do not change when you change which system you have designated the reference frame. Write φij\varphi_{ij} = G mAm_A mBm_B t / (ℏ\hbar dijd_{ij}) for the phase a pair of branches i,j ∈\in \{L,R\} accumulates over interaction time t at separation dijd_{ij} , with G Newton’s constant and ℏ\hbar the reduced Planck constant. Three of the four possible combinations of these branch-pair phases can always be removed by a purely local choice of phase convention on each mass separately —…

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A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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Sources cited in the article section

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