Supersolid phases of dipolar fermions in a two-dimensional-lattice bilayer array

Camacho-Guardián, Arturo; Paredes, R.

doi:10.1103/physreva.94.043638

Cited by 5 publications

(6 citation statements)

References 49 publications

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“…Based on the current experimental advances in manipulating ultracold atoms and molecules, here we propose a model to address the study of superfluid and supersolid phases [19]. This model consist of Fermi molecules with dipole moment d and mass m lying in two parallel square lattices of lattice constant a separated by a distance λ, and a harmonic trap with frequency ω (Fig.…”

Section: Superfluid and Supersolid Phases In An Ultracold Gasmentioning

confidence: 99%

Superfluid and supersolid phases in optical lattices in two dimensions

Camacho-Guardián

Paredes

2018

AIP Conference Proceedings

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Abstract. This work addresses the study of superfluid and supersolid phases of dipolar Fermi molecules lying in a two dimensional space. The prediction of these phases, performed within a mean field analysis, results from proposing a model in which interacting Fermi molecules are confined in a bilayer array of parallel lattices with square symmetry. As a result of the repulsive intralayer and attractive interlayer interactions between dipolar molecules, a checkerboard pattern and a paired superfluid regimes can emerge. The supersolid phase is identified as the spatial coexistence of density ordered and superfluid phases. The model here proposed can be implemented within the current experimental capabilities as a function of the interlayer separation and the application of an external electric field varying the dipolar interaction between molecules.

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Section: Superfluid and Supersolid Phases In An Ultracold Gasmentioning

confidence: 99%

Superfluid and supersolid phases in optical lattices in two dimensions

Camacho-Guardián

Paredes

2018

AIP Conference Proceedings

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“…For spinless fermions, a similar expression equation ( 77) can also be derived, yet because of the Pauli exclusion principle, the second and fourth terms of the sum in equation ( 77) cancels, only retaining the tunnelling and NNI terms. Theoretically, this case is also of interest, yet turns out to be more complicated to treat than the boson one [13,146,[739][740][741][742][743][744][745]. Few studies have shown that various kinds of charge-density-wave and SSPs also forms in dipolar fermions lattice systems in 2D [739][740][741][742]744] and 3D [743].…”

Section: Extended Hubbard Hamiltonian and Consequencesmentioning

confidence: 99%

Dipolar physics: a review of experiments with magnetic quantum gases

et al. 2022

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Since the achievement of quantum degeneracy in gases of chromium atoms in 2004, the experimental investigation of ultracold gases made of highly magnetic atoms has blossomed. The field has yielded the observation of many unprecedented phenomena, in particular those in which long-range and anisotropic dipole-dipole interactions play a crucial role. In this review, we aim to present the aspects of the magnetic quantum-gas platform that make it unique for exploring ultracold and quantum physics as well as to give a thorough overview of experimental achievements. Highly magnetic atoms distinguish themselves by the fact that their electronic ground-state configuration possesses a large spin (as well as a large $g$ factor). This results in a large magnetic moment and a rich electronic transition spectrum. Such transitions are useful for cooling, trapping, and manipulating these atoms. The complex atomic structure and large dipolar moments of these atoms also lead to a dense spectrum of resonances in their two-body scattering behaviour. These resonances can be used to control the interatomic interactions and, in particular, the relative importance of contact over dipolar interactions. These features provide exquisite control knobs for exploring the few- and many-body physics of dipolar quantum gases. The study of dipolar effects in magnetic quantum gases has covered various few-body phenomena that are based on elastic and inelastic anisotropic scattering. Various many-body effects have also been demonstrated. These affect both the shape, stability, dynamics, and excitations of fully polarised repulsive Bose or Fermi gases. Beyond the mean-field instability, strong dipolar interactions competing with slightly weaker contact interactions between magnetic bosons yield new quantum-stabilised states, among which are self-bound droplets, droplet assemblies, and supersolids. Dipolar interactions also deeply affect the physics of atomic gases with an internal degree of freedom as these interactions intrinsically couple spin and atomic motion. Finally, long-range dipolar interactions can stabilise strongly correlated excited states of 1D gases and also impact the physics of lattice-confined systems, both at the spin-polarised level (Hubbard models with off-site interactions) and at the spinful level (XYZ models). In the present manuscript, we aim to provide an extensive overview of the various related experimental achievements up to the present.

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“…Molecules can move through sites in a given layer, but they cannot tunnel between layers. Given the arrangement illustrated in Figure , several interactions between pairs can arise, such interactions being essential to define the possible phases or ordered structures as stripes or checkerboard patterns . The purpose of this work is to study the p ‐wave superfluidity emerging from attractive interactions between molecules lying in layers A and B .…”

Section: Modelmentioning

confidence: 99%

“…Given the arrangement illustrated in Fig. 1, several interactions between pairs can arise, being such interactions essential to define the possible phases or ordered structures that can be formed [22][23][24][25]. The purpose of this work is to study the p−wave superfluidity emerging from attractive interactions between molecules lying in layers A and B.…”

Section: Modelmentioning

confidence: 99%

p‐Wave Superfluid Phases of Fermi Molecules in a Bilayer Lattice Array

Domínguez-Castro

Paredes

2018

Annalen der Physik

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The superfluid p = p x + ip y phases in an ultracold gas of dipolar Fermi molecules lying in two parallel square lattices in 2D are investigated. As shown by a two-body study, dipole moments oriented in opposite directions in each layer are the key ingredients in our mean-field analysis from which unconventional superfluidity is predicted. The T = 0 phase diagram summarizes our findings: stable and metastable superfluid phases appear as a function of both, the dipole-dipole interaction coupling parameter and filling factor. A first-order phase transition, and thus a mixture of superfluid phases at different densities, is revealed from the coexistence curves in the metastable region. The model predicts that these superfluid phases can be observed experimentally at 10 nK in molecules of NaK confined in optical lattices of size a = 532 nm. Other routes to reach higher temperatures require the use of subwavelength confinement technique.

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Supersolid phases of dipolar fermions in a two-dimensional-lattice bilayer array

Cited by 5 publications

References 49 publications

Superfluid and supersolid phases in optical lattices in two dimensions

Superfluid and supersolid phases in optical lattices in two dimensions

Dipolar physics: a review of experiments with magnetic quantum gases

p‐Wave Superfluid Phases of Fermi Molecules in a Bilayer Lattice Array

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