Symbol hat J
hat J 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 quantity in seconds (or, equivalently, in units of ), invariant under the group action because both of its terms are. Two limits recover ordinary, unconstrained Hayden-Preskill behavior exactly, as any honest extension of that result has to. Remove the conservation law — set = 0 — and there is no eigenspace structure left for a heading to hide behind; whatever continuous label survives becomes an ordinary classical parameter encoded in radiation no differently than the qubit’s own logical content, and . Alternatively, keep the conservation law but grant the two parties an unlimited, pre-shared external reference frame: Kitaev, Mayers, and Preskill’s simulation…
Read the representative guide
How to interpret it
Read it with the definitions, units, and assumptions supplied by the article.
Research cited beside this formula
Published contexts (1)
A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.
Equation 114 · Evolutionary Physics
The Bit Comes Back Before the Bearing
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
a quantity in seconds (or, equivalently, in units of ), invariant under the group action because both of its terms are. Two limits recover ordinary, unconstrained Hayden-Preskill behavior exactly, as any honest extension of that result has to. Remove the conservation law — set = 0 — and there is no eigenspace structure left for a heading to hide behind; whatever continuous label survives becomes an ordinary classical parameter encoded in radiation no differently than the qubit’s own logical content, and . Alternatively, keep the conservation law but grant the two parties an unlimited, pre-shared external reference frame: Kitaev, Mayers, and Preskill’s simulation…
Equation guide → · Article →