Dipolar Bose Supersolid Stripes
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10.1103/PhysRevLett.119.250402
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/112550
Tipus de documentArticle
Data publicació2017-12-20
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Abstract
We study the superfluid properties of a system of fully polarized dipolar bosons moving in the
XY plane. We focus on the general case where the polarization field forms an arbitrary angle a with respect to the Z axis, while the system is still stable. We use the diffusion Monte Carlo and the path integral ground state methods to evaluate the one-body density matrix and the superfluid fractions in the region of the phase diagram where the system forms stripes. Despite its oscillatory behavior, the presence of a finite large-distance asymptotic value in the s-wave component of the one-body density matrix indicates the existence of a Bose condensate. The superfluid fraction along the stripes direction is always close to 1, while in the Y direction decreases to a small value that is nevertheless different from zero. These two facts confirm that the stripe phase of the dipolar Bose system is a clear candidate for an intrinsic supersolid without the presence of defects as described by the Andreev-Lifshitz mechanism.
CitacióBombin, R., Boronat, J., Mazzanti, F. Dipolar Bose Supersolid Stripes. "Physical review letters", 20 Desembre 2017, vol. 119, núm. 25.
ISSN0031-9007
Versió de l'editorhttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.250402
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