Tuning photon-mediated interactions in a multimode cavity: from
supersolid to insulating droplets hosting phononic excitations
- URL: http://arxiv.org/abs/2305.16244v2
- Date: Thu, 26 Oct 2023 17:07:41 GMT
- Title: Tuning photon-mediated interactions in a multimode cavity: from
supersolid to insulating droplets hosting phononic excitations
- Authors: Natalia Masalaeva, Helmut Ritsch, Farokh Mivehvar
- Abstract summary: We study supersolid and droplet states with phonon-like lattice excitations by coupling a Bose gas to longitudinal modes of a ring cavity.
The interplay between contact collisional and tunable-range cavity-mediated interactions leads to a rich phase diagram.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Ultracold atoms trapped in laser-generated optical lattices serve as a
versatile platform for quantum simulations. However, as these lattices are
infinitely stiff, they do not allow to emulate phonon degrees of freedom. This
restriction can be lifted in emerged optical lattices inside multimode
cavities. Motivated by recent experimental progress in multimode cavity QED, we
propose a scheme to implement and study supersolid and droplet states with
phonon-like lattice excitations by coupling a Bose gas to many longitudinal
modes of a ring cavity. The interplay between contact collisional and
tunable-range cavity-mediated interactions leads to a rich phase diagram, which
includes elastic supersolid as well as insulating droplet phases exhibiting
roton-type mode softening for a continuous range of momenta across the
superradiant phase transition. The non-trivial dynamic response of the system
to local density perturbations further proves the existence of phonon-like
modes.
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