Quench Dynamics of a Fermi Gas with Strong Nonlocal Interactions

Guardado-Sanchez, Elmer; Spar, Benjamin M.; Schauß, Peter; Belyansky, Ron; Young, Jeremy T.; Bienias, Przemysław; Gorshkov, Alexey V.; Iadecola, Thomas; Bakr, Waseem

doi:10.1103/physrevx.11.021036

Cited by 93 publications

(63 citation statements)

References 69 publications

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“…In this regard, our interpretation of the plaquette term as a correlated hop of particles could already extend the schemes provided in [43], which however was postulated for the limit of large boson occupation numbers. In fact, Reference [44] already describes a Rydberg atom implementation of the fermionic t-V model which allows the fermions to hop along only one spatial direction. With additional interactions to force fermions in adjacent chains to hop together, one could realize exactly the plaquette interaction.…”

Section: Discussionmentioning

confidence: 99%

Exploring Bosonic and Fermionic Link Models on $(3+1)-$d tubes

Banerjee,

Huffman,

Rammelmüller

2022

Preprint

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Quantum link models (QLMs) have attracted a lot of attention in recent times as a generalization of Wilson's lattice gauge theories (LGT), and are particularly suitable for realization on quantum simulators and computers. These models are known to host new phases of matter and act as a bridge between particle and condensed matter physics. In this article, we study the Abelian U (1) lattice gauge theory in (3 + 1)-d tubes using large-scale exact diagonalization (ED). We are then able to motivate the phase diagram of the model with finite size scaling techniques (FSS), and in particular propose the existence of a Coulomb phase. Furthermore, we introduce the first models involving fermionic quantum links, which generalize the gauge degrees of freedom to be of fermionic nature. We prove that while the spectra remain identical between the bosonic and the fermionic versions of the U (1)-symmetric quantum link models in (2 + 1)-d, they are different in (3 + 1)-d. We discuss the prospects of realizing the magnetic field interactions as correlated hopping in quantum simulator experiments.

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Section: Discussionmentioning

confidence: 99%

Exploring Bosonic and Fermionic Link Models on $(3+1)-$d tubes

Banerjee,

Huffman,

Rammelmüller

2022

Preprint

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“…In this work, we provided and characterized the phase diagram of a system of spinless hard-core bosons in a square ladder lattice at filling ν = 2/5, interacting via soft-shoulder potentials, and in the absence of inter-chain tunneling. These models are directly inspired by experimental setups using Rydberg atoms loaded in an optical lattice [24], where most of the regimes we propose are in principle accessible.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

“…1(a)). In addition to this theoretical motivation, a recent experiment [24] has realized many-body dynamics of single-species Hubbard models with clustering interactions. In two-leg square ladders, our findings below are, in large part, motivated by such experimental capabilities, and offer a clear theoretical pathway to investigate the effects of frustration within that platform.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram of Rydberg-dressed atoms on two-leg square ladders: Coupling supersymmetric conformal field theories on the lattice

Tsitsishvili,

Chanda,

Votto

et al. 2021

Preprint

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We investigate the phase diagram of hard-core bosons in two-leg ladders in the presence of softshoulder potentials. We show how the competition between local and non-local terms gives rise to a phase diagram with liquid phases with dominant cluster, spin-, and density-wave quasi-long-range ordering. These phases are separated by Berezinskii-Kosterlitz-Thouless, Gaussian, and supersymmetric (SUSY) quantum critical transitions. For the latter, we provide a phenomenological description of coupled SUSY conformal field theories, whose predictions are confirmed by matrix-product state simulations. Our results are motivated by, and directly relevant to, recent experiments with Rydberg-dressed atoms in optical lattices, where ladder dynamics has already been demonstrated, and emphasize the capabilities of these setups to investigate exotic quantum phenomena such as cluster liquids and coupled SUSY conformal field theories.

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“…In particular, the stability of elementary excitation and the emergence of supersolidity is connected to R. So far experimental and theoretical studies have mostly focused on spin [39][40][41] and Bosonic systems [25][26][27][28][29][42][43][44]. In a recent experiment [45], dressing of the Fermionic 6 Li atoms to Rydberg P -states was demonstrated, which in- deed highlighted new opportunities for the exploration of correlated many-body phases with Rydberg-dressed Fermions [46][47][48][49][50].…”

mentioning

confidence: 99%

Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions

Zhou

Nath

et al. 2021

Phys. Rev. A

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We study theoretically the deformation of the Fermi surface (FS) of a three dimensional gas of Rydberg-dressed 6 Li atoms. The laser dressing to high-lying Rydberg D-states results in angledependent soft-core shaped interactions whose anisotropy is described by multiple spherical harmonics. We show that this can drastically modify the shape of the FS and that its deformation depends on the interplay between the Fermi momentum kF and the reciprocal momentum k corresponding to the characteristic soft-core radius of the dressing-induced potential. When kF < k, the dressed interaction stretches a spherical FS into an ellipsoid. When kF ≳ k, complex deformations are encountered which exhibit multipolar characteristics. We analyze the formation of Cooper pairs around the deformed FS, and show that they occupy large orbital angular momentum states (p-, fand h-wave) coherently. Our study demonstrates that Rydberg-dressing to high angular momentum states may pave a route towards the investigation of unconventional Fermi gases, and multiwave superconductivity.

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Quench Dynamics of a Fermi Gas with Strong Nonlocal Interactions

Cited by 93 publications

References 69 publications

Exploring Bosonic and Fermionic Link Models on $(3+1)-$d tubes

Exploring Bosonic and Fermionic Link Models on $(3+1)-$d tubes

Phase diagram of Rydberg-dressed atoms on two-leg square ladders: Coupling supersymmetric conformal field theories on the lattice

Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions

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