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.

Quasiparticle dynamics in a Bose insulator probed by interband Bragg spectroscopy / N. Fabbri; S. D. Huber; D. Clément; L. Fallani; C. Fort; M. Inguscio; E. Altman. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 109:(2012), pp. 055301-055301. [10.1103/PhysRevLett.109.055301]

Quasiparticle dynamics in a Bose insulator probed by interband Bragg spectroscopy

FABBRI, NICOLE;FALLANI, LEONARDO;FORT, CHIARA;INGUSCIO, MASSIMO;
2012

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 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.
2012
109
055301
055301
N. Fabbri; S. D. Huber; D. Clément; L. Fallani; C. Fort; M. Inguscio; E. Altman
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/780657
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