  Here we present an experimentally feasible scheme to entangle flying qubit
(individual photon with polarization modes) and stationary qubit (atomic
ensembles with long-lived collective excitations). This entanglement integrate
two different species can act as a critical element for the coherent transform
of quantum information between flying and stationary qubits. The entanglement
degree can be also adjusted expediently with linear optics. Furthermore, the
present scheme can be modified to generate this entanglement in a way
event-ready with the employment of a pair of entangled photons. Then successful
preparation can be unambiguously heralded by coincident between two
single-photon detectors. Its application for individal photons quantum memory
is also analyzed. The physical requirements of all those preparation and
applications processing are moderate, and well fit the present technique.
