  We have considered theoretically the feasibility of the broadband quantum
memory based on the resonant tripod-type atomic configuration. In this case,
the writing of a signal field is carried out simultaneously into two channels,
and characterized by an excitation of two spin waves of the atomic ensemble.
With simultaneous read out from both channels quantum properties of the
original signal are mapped on the retrieval pulse no worse than in the case of
memory based on Lambda-type atomic configuration. At the same time new
possibilities are opened up for manipulation of quantum states associated with
sequential reading out (and/or sequential writing) of signal pulses. For
example, the pulse in squeezed state is converted into two partially entangled
pulses with partially squeezed quadratures. Alternatively, two independent
signal pulses with orthogonal squeezed quadratures can be converted into two
entangled pulses.
