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.

6 pages, 5 figures

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• A High Phase-Space-Density Gas of Polar Molecules
• Bose-Einstein condensation of chromium
• Observation of dipole-dipole interaction in a degenerate quantum gas
• Quantum degenerate dipolar Fermi gas
• Anisotropic Fermi Superfluid via p-wave Feshbach Resonance
• Double-degenerate Bose-Fermi mixture of strontium
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Cited by in corpus (25)

• Droplets of trapped quantum dipolar bosons
• Liquid quantum droplets of ultracold magnetic atoms
• Strongly interacting ultracold polar molecules
• Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
• A chromium dipolar Fermi sea
• Anisotropic expansion of a thermal dipolar Bose gas
• Striped Ferronematic ground states in a spin-orbit coupled $S=1$ Bose gas
• Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
• Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of equilibrium
• Two-temperature momentum distribution in a Thulium magneto-optical trap
• Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions
• Linear Response of a Periodically Driven Thermal Dipolar Gas
• 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
• Stability of a trapped dipolar quantum gas
• 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
• Hyperfine spectroscopy and laser cooling of the fermionic isotopes ${}^{47}$Ti and ${}^{49}$Ti
• Mutual dipolar drag in a bilayer Fermi gas
• Multiple polaron quasiparticles with dipolar fermions in a bilayer geometry
• Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms
• Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases
• The fate of the Fermi surface coupled to a single-wave-vector cavity mode