2022/07/29 by Jia Wang, Hui Hu, Wang, Jia +3
Materials Science · Physics and Astronomy · #2D Materials and Applications #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum Gases (cond-mat.quant-gas) #Semiconductor Quantum Structures and Devices #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.2207.14509
openalex publication_date 2022/07/29 · openalex created_date 2022/08/02 · openalex updated_date 2026/07/28
We present a full microscopic many-body calculation of a recently-proposed nonlinear two-dimensional spectroscopy for Fermi polarons, and show that the quantum coherence between the attractive and repulsive polarons, which has never been experimentally examined, can be unambiguously revealed via quantum beats at the two off-diagonal crosspeaks in the two-dimensional spectrum. We predict that particle-hole excitations make the two crosspeaks asymmetric and lead to an additional side peak near the diagonal repulsive polaron peak. Our simulated spectra can be readily examined in future cold-atom experiments, where the two-dimensional spectroscopy is to be implemented by using a Ramsey interference sequence of rf pulses in the time domain. Our results also provide a first-principle understanding of the recent two-dimensional coherent spectroscopy of interacting excitons and trions in doped monolayer transition metal dichalcogenides.