Symbol H_S
is part of the quantity the equation computes from the expression on the right.
Read this term in its guide →Published equation contexts
Why this formula appears here
A single exactly solvable case makes the ledger’s behavior concrete, and it is worth being explicit that what follows is an analytic evaluation of a stated model, not a simulation and not a measurement. Let S and B each be a two-level system — a spin, in the sense this literature uses the word for any two-state quantum degree of freedom — with bare Hamiltonians = (/2) and = (/2) tuned to the same frequency , coupled by an excitation-conserving exchange term,
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Symbol omega
omega is an input to the expression that computes the quantity on the left.
Read this term in its guide →Symbol sigma_z^S
sigm is an input to the expression that computes the quantity on the left.
Read this term in its guide →How to interpret it
Read it with the definitions, units, and assumptions supplied by the article.
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Published contexts (1)
A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.
Equation 76 · Evolutionary Physics
The Entry a Relabeling Cannot Write
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
A single exactly solvable case makes the ledger’s behavior concrete, and it is worth being explicit that what follows is an analytic evaluation of a stated model, not a simulation and not a measurement. Let S and B each be a two-level system — a spin, in the sense this literature uses the word for any two-state quantum degree of freedom — with bare Hamiltonians = (/2) and = (/2) tuned to the same frequency , coupled by an excitation-conserving exchange term,
Equation guide → · Article →