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arXiv · 1402.3313

Ground state and excitation properties of soft-core bosons

Tommaso Macri·Sebastiano Saccani·Fabio Cinti
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Abstract

We study the physics of soft-core bosons at zero temperature in two dimensions for a class of potentials that could be realised in experiments with Rydberg dressed Bose-Einstein condensates. We analyze the ground state properties of the system in detail and provide a complete description of the excitation spectra in both superfluid, supersolid and crystalline phase for a wide range of interaction strengths and densities. In addition we describe a method to extract the transverse gapless excitation modes in the phases with broken translational symmetry within the framework of path integral Monte Carlo methods.

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Tommaso Macri, Sebastiano Saccani, Fabio Cinti. 2014-02-13. Ground state and excitation properties of soft-core bosons. https://doi.org/10.1007/s10909-014-1192-7

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