  We report an experiment in which long-lived quantum memories for photonic
polarization qubits (PPQs) are controllably released into any one of multiple
separate channels. The PPQs are implemented with an arbitrarily-polarized
coherent signal light pulses at the single-photon level and are stored in cold
atoms by means of electromagnetic-induced-transparency scheme. Reading laser
pulses propagating along the direction at a small angle relative to quantum
axis are applied to release the stored PPQs into an output channel. By changing
the propagating directions of the read laser beam, we controllably release the
retrieved PPQs into 7 different photonic output channels, respectively. At one
of the output channels, the measured maximum quantum-process fidelity for the
PPQs is 94.2% at storage time of t= 0.85ms. At storage time of 6 ms, the
quantum-process fidelity is still beyond 78%, the threshold for the violation
of the Bell inequality. The demonstrated controllable release of the stored
PPQs may extend the capabilities of the quantum information storage technique.
