Equation 11 · Part 1 · The Entry a Relabeling Cannot Write
Symbol H_c
What this part means
wrong, does not touch the total energy of any closed system, and does not by itself explain where a nonzero reading comes from.
Its job in the formula
is part of the quantity the equation computes from the expression on the right.
Full expression→Symbol H_c→Article meaning
Where the article explains it
It does not propose that or is wrong, does not touch the total energy of any closed system, and does not by itself explain where a nonzero reading comes from; it only names, precisely and checkably, how large the disagreement is between two fully specified descriptions.
The passage around this formula
A coarse description reports less. It is built from a completely positive, trace-preserving map , a quantum channel sending fine states to coarse states, together with a coarse Hilbert space and a Hermitian coarse Hamiltonian on it. The simplest case is the partial trace over the bath, = [] with = ; nothing below depends on that particular choice, and a passive relabeling built from no discarding at all, treated next, is a channel too.
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
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Sources cited in the article section
These citations provide research context; check each source for the exact claim it supports.