  We present a method for network-capable quantum computing that relies on
holographic spin-wave excitations stored collectively in ensembles of qubits.
We construct an orthogonal basis of spin waves in a one-dimensional array and
show that high-fidelity universal linear controllability can be achieved using
only phase shifts, applied in both momentum and position space. Neither
single-site addressability nor high single-qubit cooperativity is required, and
the spin waves can be read out with high efficiency into a single cavity mode
for quantum computing and networking applications.
