Excitations of a binary supersolid – Dipolar Quantum Gases

by W. Kirkby, A.-C. Lee, D. Baillie, T. Bland, F. Ferlaino, P. B. Blakie, R. N. Bisset

Abstract:

We predict a rich excitation spectrum of a binary dipolar supersolid in a linear crystal geometry, where the ground state consists of two partially immiscible components with alternating, interlocking domains. We identify three Goldstone branches, each with first-sound, second-sound or spin-sound character. In analogy with a diatomic crystal, the resulting lattice has a two-domain primitive basis and we find that the crystal (first-sound-like) branch is split into optical and acoustic phonons. We also find a spin-Higgs branch that is associated with the supersolid modulation amplitude.

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Reference:

Excitations of a binary supersolid,
W. Kirkby, A.-C. Lee, D. Baillie, T. Bland, F. Ferlaino, P. B. Blakie, R. N. Bisset,
2023.

Bibtex Entry:

@article{kirkby2023eoa,
      title={Excitations of a binary supersolid}, 
      author={W. Kirkby and A.-C. Lee and D. Baillie and T. Bland and F. Ferlaino and P. B. Blakie and R. N. Bisset},
      year={2023},
	  month = {Dec},
	abstract = {We predict a rich excitation spectrum of a binary dipolar supersolid in a linear crystal geometry,
where the ground state consists of two partially immiscible components with alternating, interlocking
domains. We identify three Goldstone branches, each with first-sound, second-sound or spin-sound
character. In analogy with a diatomic crystal, the resulting lattice has a two-domain primitive basis
and we find that the crystal (first-sound-like) branch is split into optical and acoustic phonons. We
also find a spin-Higgs branch that is associated with the supersolid modulation amplitude.},
      eprint={2312.03390},
      archivePrefix={arXiv},
      primaryClass={cond-mat.quant-gas},
	  arXiv = {http://arxiv.org/abs/2312.03390},
	url = {http://arxiv.org/abs/2312.03390}
}