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Equation 71 · Part 1 · The Entry a Relabeling Cannot Write

Symbol H_SB

HSB≠0H_{SB} \ne 0
HSBH_{SB}

What this part means

HSH_SB 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

HSH_SB 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

Second, an entangled joint state with HSBH_{SB} ≠\ne 0 : now Tr\mathrm{Tr}[ρ\rho HSBH_{SB}] need not vanish, and, more importantly, it need not be assignable to “the system’s energy” or “the bath’s energy” separately at all. It is a property of the correlations in the joint state itself, a genuine interaction and correlation energy that a…

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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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