A chromium dipolar Fermi sea

Abstract

We report on the production of a degenerate Fermi gas of 53Cr atoms, polarized in the state F=9/2, m_F=-9/2, by sympathetic cooling with bosonic S=3, m_S=-3 52Cr atoms. We load in an optical dipole trap 3.10^4 53Cr atoms with 10^6 52Cr atoms. Despite this initial small number of fermionic atoms, we reach a final temperature of T=0.6 T_f (Fermi temperature), with up to 10^3 53Cr atoms. This surprisingly efficient evaporation stems from an inter-isotope scattering length |a_{BF}| = (85+/- 10) a_{Bohr} which is small enough to reduce evaporative losses of the fermionic isotope, but large enough to insure thermalization.

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References in corpus (25)

• Bose-Einstein condensation of chromium
• A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
• A Strongly Dipolar Bose-Einstein Condensate of Dysprosium
• Bose-Einstein Condensation of Erbium
• Condensed Matter Theory of Dipolar Quantum Gases
• Quantum degenerate dipolar Fermi gas
• Stabilizing a purely dipolar quantum gas against collapse
• d-wave collapse and explosion of a dipolar Bose-Einstein condensate
• Non-equilibrium quantum magnetism in a dipolar lattice gas
• Quantum Chaos in Ultracold Collisions of Erbium
• Reaching Fermi degeneracy via universal dipolar scattering
• Superfluid pairing in a polarized dipolar Fermi gas
• Observation of Feshbach resonances in an ultracold gas of ${}^{52}$Cr
• Anomalous Behavior of Spin Systems with Dipolar Interactions
• Observation of low-field Fano-Feshbach resonances in ultracold gases of dysprosium
• Dipolar Relaxation in an ultra-cold Gas of magnetically trapped chromium atoms
• Observation of Fermi surface deformation in a dipolar quantum gas
• Control of dipolar relaxation in external fields
• Anisotropic excitation spectrum of a dipolar quantum Bose gas
• Topological p_x+ip_y Superfluid Phase of Fermionic Polar Molecules
• Collective excitations of a dipolar Bose-Einstein condensate
• Thermodynamics of a Bose Einstein condensate with free magnetization
• Simultaneous Magneto-Optical Trapping of Bosonic and Fermionic Chromium Atoms
• Optimized loading of an optical dipole trap for the production of Chromium BECs
• Dipolar atomic spin ensembles in a double-well potential

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• Anisotropic dependence of tune-out wavelength near Dy 741-nm transition
• Universal clusters as building blocks of stable quantum matter
• Ultralong-range order in the Fermi-Hubbard model with long-range interactions
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• Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime
• Ground states of 2D tilted dipolar bosons with density-induced hopping
• The ground state of polaron in an ultracold dipolar Fermi gas
• Interaction-driven Lifshitz transition with dipolar fermions in optical lattices
• Dissipative Preparation of Antiferromagnetic Order in the Fermi-Hubbard Model
• Reentrant Superfluidity and Pair Density Wave in Single Component Dipolar Fermi Gases
• Dynamics of ultracold dipolar particles in a confined geometry and tilted fields
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• Competing many-body instabilities in two-dimensional dipolar Fermi gases
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• The Symplectic Fermi Liquid and its realization in cold atomic systems
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• Fractional quantum Hall states of dipolar fermions in a strained optical lattice
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• Dissipative cooling of spin chains by a bath of dipolar particles
• Polarization spectroscopy of atomic erbium in a hollow cathode lamp
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• Quantum Degenerate Majorana Surface Zero Modes in Two-Dimensional Space
• The effect of anisotropic exchange interactions and short-range phenomena on superfluidity in a homogeneous dipolar Fermi gas
• Asymptotic behavior of correlation functions of one-dimensional polar-molecules on optical lattices
• Ground state energy and phase transitions of Long-range XXZ using VQE
• Quantum simulation of the Hubbard model with ultracold fermions in optical lattices
• Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms