Negative Polarization through Photon to Electron Spin Polarization Transfer in GaAs Quantum Wells

Details Negative Polarization through Photon to Electron Spin Polarization Transfer in GaAs Quantum Wells Negative Polarization through Photon to Electron Spin Polarization Transfer in GaAs Quantum Wells

2006-09-20

arxiv.org/abs/quant-ph/0609152v1

Physics

Quantum Physics

4 pages, 3 figures. Submitted to Phys. Rev. B

Scientific paper

We demonstrate negative polarization created by light-hole exciton excitation in g-factor engineered GaAs quantum wells measured by time-resolved Kerr rotation and polarization-resolved photoluminescence. This negative polarization is a result of polarization transfer from a photon to an electron spin mediated by a light hole. This demonstration is an important step towards achieving quantum media conversion from a photonic qubit to an electron spin qubit required for building a quantum repeater.

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