Quantum process tomography on vibrational states of atoms in an optical lattice
Stefan H. Myrskog, J. K. Fox, Morgan W. Mitchell, Aephraim M. Steinberg · Physical Review A · 2005
Quantum process tomography is used to fully characterize the evolution of the quantum vibrational state of atoms. Rubidium atoms are trapped in a shallow optical lattice supporting only two vibrational states, which we characterize by reconstructing the $2\ifmmode\times\else\texttimes\fi{}2$ density matrix. Repeating this reconstruction for a complete set of inputs allows us to completely characterize both the system's intrinsic decoherence and resonant coupling.