Many-body two-quantum coherences in semiconductor nanostructures

Details Many-body two-quantum coherences in semiconductor nanostructures Many-body two-quantum coherences in semiconductor nanostructures

2009-06-22

arxiv.org/abs/0906.4068v2

Phys. Rev. Lett. 104, 117401 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.104.117401

We present experimental coherent two-dimensional Fourier transform spectra of the exciton resonances in semiconductor quantum wells for a pulse sequence that isolates two-quantum coherences. By measuring the real part of the spectra, we can determine that the spectra are dominated by two quantum coherences due to many-body interactions, not bound biexcitons. Simulations performed using dynamics controlled truncation agree well with the experiments.

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