Observation of Fermi surface deformation in a dipolar quantum gas

Abstract

The deformation of a Fermi surface is a fundamental phenomenon leading to a plethora of exotic quantum phases. Understanding these phases, which play crucial roles in a wealth of systems, is a major challenge in atomic and condensed-matter physics. Here, we report on the observation of a Fermi surface deformation in a degenerate dipolar Fermi gas of erbium atoms. The deformation is caused by the interplay between strong magnetic dipole-dipole interaction and the Pauli exclusion principle. We demonstrate the many-body nature of the effect and its tunability with the Fermi energy. Our observation provides basis for future studies on anisotropic many-body phenomena in normal and superfluid phases.

arXiv comment6 pages, 5 figures

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Cited by in corpus (71)

• Dipolar physics: A review of experiments with magnetic quantum gases
• A Fermi-degenerate three-dimensional optical lattice clock
• Evaporation of microwave-shielded polar molecules to quantum degeneracy
• Dipolar Quantum Mixtures of Erbium and Dysprosium Atoms
• Emergence of chaotic scattering in ultracold Er and Dy
• Ultracold Dipolar Molecules Composed of Strongly Magnetic Atoms
• Droplets of trapped quantum dipolar bosons
• Strongly interacting ultracold polar molecules
• Liquid quantum droplets of ultracold magnetic atoms
• Tuning the dipole-dipole interaction in a quantum gas with a rotating magnetic field
• Quantum Hall Physics with Cold Atoms in Cylindrical Optical Lattices
• Realization of a Strongly Interacting Fermi Gas of Dipolar Atoms
• Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
• A chromium dipolar Fermi sea
• A two-species five-beam magneto-optical trap for highly magnetic Er and Dy atoms
• Accurate Determination of the Dynamical Polarizability of Dysprosium
• Anisotropic expansion of a thermal dipolar Bose gas
• Optical cooling and trapping of highly magnetic atoms: The benefits of a spontaneous spin polarization
• Striped Ferronematic ground states in a spin-orbit coupled $S=1$ Bose gas
• Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals $C_6$ coefficients
• Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
• Dipolar dephasing of Rydberg D-state polaritons
• Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of equilibrium
• Quantum phases of tilted dipolar bosons in two-dimensional optical lattice
• Anisotropic optical trapping as a manifestation of the complex electronic structure of ultracold lanthanide atoms: the example of holmium
• Coupled Atomic Wires in a Synthetic Magnetic Field
• Ultralong-range order in the Fermi-Hubbard model with long-range interactions
• Liquid crystal phases of two-dimensional dipolar gases and Berezinskii-Kosterlitz-Thouless melting
• Two-temperature momentum distribution in a Thulium magneto-optical trap
• Coexistence of Nematic Order and Superconductivity in the Hubbard Model
• Magnetically tunable Feshbach resonances in ultracold gases of europium atoms and mixtures of europium and alkali-metal atoms
• An Effective Potential Theory for Transport Coefficients Across Coupling Regimes
• Spin Hall Effect in a Spinor Dipolar Bose-Einstein Condensate
• Two-dimensional Mixture of Dipolar Fermions: Equation of State and Magnetic Phases
• Proposal for laser-cooling of rare-earth ions
• The ground state of polaron in an ultracold dipolar Fermi gas
• Interaction-driven Lifshitz transition with dipolar fermions in optical lattices
• Tuneable defect interactions and supersolidity in dipolar quantum gases on a lattice potential
• Physical dipoles and second order perturbation theory for dipolar fermions in two dimensions
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• Linear Response of a Periodically Driven Thermal Dipolar Gas
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• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Tuning the Drude weight of Dirac-Weyl fermions in one-dimensional ring traps
• Measuring the branching ratios from the $y^8{\mathrm{P}}_{9/2}$ state to metastable states in europium
• Ground state of an ultracold Fermi gas of tilted dipoles in elongated traps
• Two dipolar atoms in a harmonic trap
• Time-of-flight expansion of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime
• Anatomy of a periodically driven p-wave superconductor
• Spin-orbit-coupled Bose-Einstein condensates of rotating polar molecules
• Stability of a trapped dipolar quantum gas
• Quantum fluctuations of a resonantly interacting $p$-wave Fermi superfluid in two dimensions
• Competing many-body instabilities in two-dimensional dipolar Fermi gases
• Effect of short-range interaction for collision of ultracold dipoles
• New opportunites for interactions and control with ultracold lanthanides
• Majorana Zero Modes in Fermionic Wires coupled by Aharonov-Bohm Cages
• Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions
• Dipolar fermions in a multilayer geometry
• Stability of quantum degenerate Fermi gases of tilted polar molecules
• Dissipative cooling of spin chains by a bath of dipolar particles
• Interplay between shell structure and trap deformation in dipolar fermi gases
• Emergent interlayer nodal superfluidity of a dipolar fermi gas in bilayer optical lattices
• Hyperfine spectroscopy and laser cooling of the fermionic isotopes ${}^{47}$Ti and ${}^{49}$Ti
• Mutual dipolar drag in a bilayer Fermi gas
• The effect of anisotropic exchange interactions and short-range phenomena on superfluidity in a homogeneous dipolar Fermi gas
• Multiple polaron quasiparticles with dipolar fermions in a bilayer geometry
• A toolbox for elementary fermions with a dipolar Fermi gas in a 3D optical lattice
• Dipolar confinement-induced molecular states in harmonic waveguides
• Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms
• The fate of the Fermi surface coupled to a single-wave-vector cavity mode
• Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases