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External field control of collective spin excitations in an optical lattice of 2Σ molecules

AuthorsPérez Ríos, Jesús ; Herrera, F.; Krems, R.V.
Issue Date2010
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 12: 103007 (2010)
AbstractWe show that an ensemble of 2Σ molecules in the ro-vibrational ground state trapped on an optical lattice exhibits collective spin excitations that can be controlled by applying superimposed electric and magnetic fields. In particular, we show that the lowest energy excitation of the molecular ensemble at certain combinations of electric and magnetic fields leads to the formation of a magnetic Frenkel exciton. The exciton bandwidth can be tuned by varying the electric or magnetic fields. We show that the exciton states can be localized by creating vacancies in the optical lattice. The localization patterns of the magnetic exciton states are sensitive to the number and distribution of vacancies, which can be exploited for engineering many-body entangled spin states. We consider the dynamics of magnetic exciton wavepackets and show that the spin excitation transfer between molecules in an optical lattice can be accelerated or slowed down by tuning an external magnetic or electric field. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Identifiersdoi: 10.1088/1367-2630/12/10/103007
issn: 1367-2630
Appears in Collections:(CFMAC-IFF) Artículos
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