Ultrafast optical control of entanglement between two quantum-dot spins

By Danny Kim, S. Carter, A. Greilich, A. Bracker, D. Gammon. 2010

193 citations recorded by the source corpus.

Optical control over electron spins embedded in semiconductor structures is an efficient way of manipulating quantum information. But a fully fledged quantum information processor will require control over two-spin states. This has now been demonstrated, including the implementation of ‘ultrafast’ two-qubit gate operations that take less than a nanosecond.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/eb14999d27ec860799d53a002c571f728cacccfe

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum control of a spin qubit coupled to a photonic crystal cavity (2012, methodology): “In the last decade there has been rapid progress both in the development of PhCs themselves and in the study of solid state emitters coupled to PhC cavities.(2-13) Both quantum dots (QDs) and nitrogen-vacancy centers”
One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces (2019, background): “Fast spin-spin gates (∼10 ns) could be performed in stacked quantum dots [40,41] while somewhat slower gates can be performed between electron and nuclear spins for nitrogen-vacancy (NV) or silicon-vacancy (SiV) centers in diamond through magnetic dipolar interaction [42].”
Deterministic generation of all-photonic quantum repeaters from solid-state emitters (2016, background): “Their broken symmetry along the growth axis provides the desired level structure and selection rules, and pairs of quantum dots can be grown in a stacked configuration allowing for coupling between the two electron spins trapped in each dot via the exchange interaction [38].”