Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/57564
Title: Fast generation of spin-squeezed states in bosonic Josephson junctions
Author: Juliá-Díaz, Bruno
Torrontegui, E.
Martorell Domenech, Juan
Muga, J. G.
Polls Martí, Artur
Keywords: Teoria quàntica
Bosons
Termodinàmica
Superconductivitat
Quantum theory
Bosons
Thermodynamics
Superconductivity
Issue Date: 2012
Publisher: American Physical Society
Abstract: We describe methods for the fast production of highly coherent-spin-squeezed many-body states in bosonic Josephson junctions. We start from the known mapping of the two-site Bose-Hubbard (BH) Hamiltonian to that of a single effective particle evolving according to a Schrödinger-like equation in Fock space. Since, for repulsive interactions, the effective potential in Fock space is nearly parabolic, we extend recently derived protocols for shortcuts to adiabatic evolution in harmonic potentials to the many-body BH Hamiltonian. A comparison with current experiments shows that our methods allow for an important reduction in the preparation times of highly squeezed spin states.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevA.86.063623
It is part of: Physical Review A, 2012, vol. 86, p. 063623-1-062623-6
Related resource: http://dx.doi.org/10.1103/PhysRevA.86.063623
URI: http://hdl.handle.net/2445/57564
ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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