Journal
PHYSICAL REVIEW B
Volume 70, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.70.195330
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The optically induced and detected entangled state involving an exciton Zeeman doublet with entanglement entropy as high as similar to0.7 was created using picosecond lasers in single GaAs quantum dots. The temporal evolution of the nonradiative Raman coherence between two exciton states was directly resolved in quantum beats measured in the homodyne detected differential transmission experiment. The Raman coherence time, 66+/-15 ps, was determined from the decay of the envelope of the quantum beats, and was found to be limited by the lifetimes of the exciton transitions, 50+/-3 ps.
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