Publication: Magnetoroton Softening in Rb Spinor Condensates with Dipolar Interactions
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2009
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American Physical Society (APS)
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Cherng, R. W., and E. Demler. 2009. “Magnetoroton Softening in Rb Spinor Condensates with Dipolar Interactions.” Physical Review Letters 103 (18) (October 27). doi:10.1103/physrevlett.103.185301.
Abstract
Superfluids with a tendency towards periodic order have both phonon- and rotonlike spectra. We show that magnetoroton softening occurs in 87Rb spinor condensates. A rich variety of dynamical instabilities emerges as a function of the magnetic field orientation and strength of the quadratic Zeeman shift. These instabilities are driven by an effective dipolar interaction modified dramatically by quasi-twodimensionality and rapid Larmor precession.
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