We present a method for network-capable quantum computing that relies on holographic spin-wave excitations stored collectively in ensembles of qubits. This construction relies on an orthogonal basis of spin waves in a one-dimensional array and is capable of high-fidelity universal linear controllability using only phase shifts, applied in both momentum and position spaces. 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. We also propose an experimental implementation using a lambda-scheme in a rubidium-atom system to establish linear quantum processing and calculate the expected experimental operational fidelities due to fundamental and technical errors. In this experimental implementation, we show that efficient methods to achieve linear controllability in both a single-ensemble and dual-ensemble configuration is possible. Finally, we show a potential application of the spin-wave processor for continuous-variable quantum information processing and present a scheme to generate large dual-rail cluster states useful for deterministic computing.
|Presenter name||David Meyer|
|How will you attend ICAP-27?||I am planning on in-person attendance|