Quasiparticle dynamics in a Bose insulator probed by inter-band Bragg spectroscopy
Quantum Gases
2014-06-06 v4 Quantum Physics
Abstract
We investigate experimentally and theoretically the dynamical properties of a Mott insulator in decoupled one-dimensional chains. Using a theoretical analysis of the Bragg excitation scheme we show that the spectrum of inter-band transitions holds information on the single-particle Green's function of the insulator. In particular the existence of particle-hole coherence due to quantum fluctuations in the Mott state is clearly seen in the Bragg spectra and quantified. Finally we propose a scheme to directly measure the full, momentum resolved spectral function as obtained in angle-resolved photoemission spectroscopy of solids.
Cite
@article{arxiv.1109.1241,
title = {Quasiparticle dynamics in a Bose insulator probed by inter-band Bragg spectroscopy},
author = {Nicole Fabbri and Sebastian D. Huber and David Clément and Leonardo Fallani and Chiara Fort and Massimo Inguscio and Ehud Altman},
journal= {arXiv preprint arXiv:1109.1241},
year = {2014}
}
Comments
The new version contains improved theoretical treatment and data analysis