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Quantum communication with quantum dot spins

2007; American Physical Society; Volume: 75; Issue: 8 Linguagem: Inglês

10.1103/physrevb.75.081302

1550-235X

Christoph Simon, Yann-Michel Niquet, X. Caillet, J. Eymery, Jean‐Philippe Poizat, Jean‐Michel Gérard,

Semiconductor Quantum Structures and Devices

Single electron spins in quantum dots are attractive for quantum communication because of their expected long coherence times. We propose a method to create entanglement between two remote spins based on the coincident detection of two photons emitted by the dots. Local nodes of two or more qubits can be realized using the dipole-dipole interaction between trions in neighboring dots and spectral addressing, allowing the realization of a quantum repeater. We have performed a detailed feasibility study of our proposal based on tight-binding calculations of quantum dot properties.