Feshbach modulation spectroscopy of the Fermi-Hubbard model

Dirks, Andreas and Mikelsons, Karlis and Krishnamurthy, HR and Freericks, JK (2015) Feshbach modulation spectroscopy of the Fermi-Hubbard model. In: PHYSICAL REVIEW A, 92 (5).

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Abstract

In the vicinity of a Feshbach resonance, a system of ultracold atoms in an optical lattice undergoes rich physical transformations which involve molecule formation and hopping of molecules on the lattice and thus goes beyond a single-band Hubbard model description. We explore theoretically the response of this system to a harmonic modulation of the magnetic field, and thus of the scattering length, across the Feshbach resonance. In the regime in which the single-band Hubbard model is still valid, we provide results for the doublon production as a function of the various parameters, such as frequency, amplitude, etc., that characterize the field modulation, as well as the lattice depth. The method may uncover a route towards the efficient creation of ultracold molecules and also provide an alternative to conventional lattice-depth-modulation spectroscopy.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW A
Publisher:	AMER PHYSICAL SOC
Additional Information:	Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Dec 2015 07:46
Last Modified:	15 Dec 2015 07:46
URI:	http://eprints.iisc.ac.in/id/eprint/52910

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