Controlling Magnetic Feshbach Resonances in Polar Open-Shell Molecules with Nonresonant Light

Michał Tomza, Rosario González-Férez, Christiane P. Koch, and Robert Moszynski
Phys. Rev. Lett. 112, 113201 – Published 20 March 2014

Abstract

Magnetically tunable Feshbach resonances for polar paramagnetic ground-state diatomics are too narrow to allow for magnetoassociation starting from trapped, ultracold atoms. We show that nonresonant light can be used to engineer the Feshbach resonances in their position and width. For nonresonant field intensities of the order of 109W/cm2, we find the width to be increased by 3 orders of magnitude, reaching a few Gauss. This opens the way for producing ultracold molecules with sizable electric and magnetic dipole moments and thus for many-body quantum simulations with such particles.

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  • Received 31 July 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.113201

© 2014 American Physical Society

Authors & Affiliations

Michał Tomza1,2,3, Rosario González-Férez2,4, Christiane P. Koch3,*, and Robert Moszynski1

  • 1Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
  • 2Instituto ’Carlos I’ de Física Teórica y Computacional and Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, 18071 Granada, Spain
  • 3Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
  • 4The Hamburg Center for Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany

  • *christiane.koch@uni-kassel.de

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Vol. 112, Iss. 11 — 21 March 2014

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