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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 |
URI: | http://hdl.handle.net/2445/57564 |
Related resource: | http://dx.doi.org/10.1103/PhysRevA.86.063623 |
ISSN: | 1050-2947 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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643296.pdf | 300.49 kB | Adobe PDF | View/Open |
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