Momentum-dependent pseudospin dimers of coherently coupled bosons in optical lattices

Chiara Menotti, Fabrizio Minganti, and Alessio Recati
Phys. Rev. A 93, 033602 – Published 1 March 2016

Abstract

We study the two-body bound and scattering states of two particles in a one-dimensional optical lattice in the presence of a coherent coupling between two internal atomic levels. Due to the interplay between periodic potential, interactions, and coherent coupling, the internal structure of the bound states depends on their center-of-mass momentum. This phenomenon corresponds to an effective momentum-dependent magnetic field for the dimer pseudospin, which could be observed in a chirping of the precession frequency during Bloch oscillations. The essence of this effect can be easily interpreted in terms of an effective bound-state Hamiltonian. Moreover for indistinguishable bosons, the two-body eigenstates can present simultaneously attractive and repulsive bound-state natures or even bound and scattering properties.

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  • Received 27 November 2015

DOI:https://doi.org/10.1103/PhysRevA.93.033602

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Chiara Menotti1, Fabrizio Minganti1,2, and Alessio Recati1,3

  • 1INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy
  • 2International Center of Fundamental Physics, Department of Physics, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
  • 3Physics Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany

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Issue

Vol. 93, Iss. 3 — March 2016

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