Spin-Photon Dynamics of Quantum Dots in Two-mode Cavities

Details Spin-Photon Dynamics of Quantum Dots in Two-mode Cavities Spin-Photon Dynamics of Quantum Dots in Two-mode Cavities

2004-05-15

arxiv.org/abs/cond-mat/0405342v2

Phys. Rev. B 70, 205329 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures; extended discussion of experimental implementation

Scientific paper

10.1103/PhysRevB.70.205329

A quantum dot interacting with two resonant cavity modes is described by a two-mode Jaynes-Cummings model. Depending on the quantum dot energy level scheme, the interaction of a singly doped quantum dot with a cavity photon generates entanglement of electron spin and cavity states or allows one to implement a SWAP gate for spin and photon states. An undoped quantum dot in the same structure generates pairs of polarization entangled photons from an initial photon product state. For realistic cavity loss rates, the fidelity of these operations is of order 80%.

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