Collective Quantum Memory Activated by a Driven Central Spin.

Emil V Denning, Dorian A Gangloff, Mete Atatüre, Jesper Mørk & Claire Le Gall
Coupling a qubit coherently to an ensemble is the basis for collective quantum memories. A single driven electron in a quantum dot can deterministically excite low-energy collective modes of a nuclear spin ensemble in the presence of lattice strain. We propose to gate a quantum state transfer between this central electron and these low-energy excitations-spin waves-in the presence of a strong magnetic field, where the nuclear coherence time is long. We develop a microscopic theory...
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