Many-body two-quantum coherences in semiconductor nanostructures

Alan D. Bristow; Denis Karaiskaj; Lijun Yang; Richard P. Mirin; Shaul Mukamel; Steven T. Cundiff; Xingcan Dai

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Many-body two-quantum coherences in semiconductor nanostructures

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arxiv 0906.4068 v2 pith:CMVCHGQM submitted 2009-06-22 cond-mat.mes-hall cond-mat.mtrl-sci

Denis Karaiskaj , Alan D. Bristow , Lijun Yang , Xingcan Dai , Richard P. Mirin , Shaul Mukamel , Steven T. Cundiff This is my paper

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keywords coherencesspectramany-bodyquantumsemiconductortwo-quantumagreebiexcitons

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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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