Symbol psi
psi is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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The baseline is the quantum speed limit. For a system with a fixed, time-independent Hamiltonian H evolving from a state toward any state orthogonal to it, the minimum time required is bounded below by the tight, unified Margolus-Levitin/Mandelstam-Tamm result of Levitin and Toffoli:
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Published contexts (1)
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Equation 8 · Evolutionary Physics
A Horizon Is a Toll Booth, Not a Loophole
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
The baseline is the quantum speed limit. For a system with a fixed, time-independent Hamiltonian H evolving from a state toward any state orthogonal to it, the minimum time required is bounded below by the tight, unified Margolus-Levitin/Mandelstam-Tamm result of Levitin and Toffoli:
Equation guide → · Article →