Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.055301
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Funding
- ISF
- MAE-MIUR (Joint Laboratory LENS-Weizmann)
- ECR Firenze
- ERC through the DISQUA
- MIUR
- Swiss Society of Friends of the Weizmann Institute of Science
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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 interband 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 the angle-resolved photoemission spectroscopy of solids.
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