We model the bang-bang optimization protocol as a shortcut to adiabaticity in the ground-
state preparation of a trapped-ion quantum simulator. Compared to a locally adiabatic …

In a large transverse field, there is an energy cost associated with flipping spins along the
axis of the field. This penalty can be employed to relate the transverse-field Ising model in a …

Recently a variant on Ramsey interferometry for coupled spin-1/2 systems was proposed to
directly measure the retarded spin-spin Green's function. In conventional experimental …