  We propose a mechanism of unconventional Rydberg pumping (URP) via
simultaneously driving each Rydberg atom by two classical fields with different
strengths of Rabi frequencies. This mechanism differs from the general Rydberg
blockade or Rydberg antiblockade since it is closely related to the ground
states of atoms, i.e. two atoms in the same ground state are stable while two
atoms in different ground states are resonantly excited. Furthermore, we find
the URP can be employed to simplify some special quantum information processing
tasks, such as implementation of a three-qubit controlled phase gate with only
a single Rabi oscillation, preparation of two- and three-dimensional
steady-state entanglement with two identical atoms, and realization of the
autonomous quantum error correction in a Rydberg-atom-cavity system. The
feasibility of the above applications is certified explicitly by the
state-of-the-art technology.
