Barbarino’s Wong

Barbarino's Wong. The tight integration of sensing actuation and computation that biological systems exhibit to achieve shape and appearance changes (like the cuttlefish and birds in flight) adaptive load support (like the banyan tree) or tactile sensing at very high dynamic range (such as the human skin) has long served as inspiration for engineered systems.

A quantal system in an eigenstate slowly transported round a circuit C by varying parameters R in its Hamiltonian Ĥ(R) will acquire a geometrical phase factor exp{iγ(C)} in addition to the familiar dynamical phase factor An explicit general formula for.

Quantal phase factors accompanying adiabatic changes

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