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Equation 59 · Part 1 · No Particle Without a Cosigner

Symbol D_rm det

DdetD_{\rm det}
DdetD_{\rm det}

What this part means

DrD_rm det 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

DrD_rm det 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

…reports the instantaneous Unruh temperature TU(a(τ)T_U(a(\tau)) at each moment, as though briefly and locally eternal. This adiabatic recovery is the second known limit this construction inherits rather than derives: it says DdetD_{\rm det} between a strictly eternal trajectory at acceleration a and a slowly varying trajectory that happens to pass through a at some instant should vanish to leading order in the rate of change, with corrections controlled by exactly the jerk and snap terms Barbado and Visser compute.

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A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the surrounding passage

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