Molecular reorganization energy in quantum-dot cellular automata switching

We examine the impact of intrinsic molecular reorganization energy on switching in two-state quantum-dot cellular automata (QCA) cells. Switching a bit involves an electron transferring between charge centers within molecule. This turn causes other atoms molecule to rearrange their positions response. capture this model that treats motion quantum-mechanically, but nuclei semiclassically. results non-linear Hamiltonian for system. Interaction with thermal environment is included by solving Lindblad equation time-dependent density matrix. The calculated response local electric field shows hysteresis during when sweep direction reversed. relaxation neighboring increases localization electron, which provides source enhanced bistability and single-molecule memory. comes at cost increased power dissipation.