title: Quantum-gas microscope for fermionic atoms.
abstract: We realize a quantum-gas microscope for fermionic ^{40}K atoms trapped in an optical lattice, which allows one to probe strongly correlated fermions at the single-atom level. We combine 3D Raman sideband cooling with high-resolution optics to simultaneously cool and image individual atoms with single-lattice-site resolution at a detection fidelity above 95%. The imaging process leaves the atoms predominantly in the 3D motional ground state of their respective lattice sites, inviting the implementation of a Maxwell's demon to assemble low-entropy many-body states. Single-site-resolved imaging of fermions enables the direct observation of magnetic order, time-resolved measurements of the spread of particle correlations, and the detection of many-fermion entanglement.
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Lawrence W
authors.initials: LW
authors.lastname: Cheuk
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Nichols
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Melih
authors.initials: M
authors.lastname: Okan
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gersdorf
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Vinay V
authors.initials: VV
authors.lastname: Ramasesh
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Waseem S
authors.initials: WS
authors.lastname: Bakr
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Thomas
authors.initials: T
authors.lastname: Lompe
authors.affiliation: Department of Physics, MIT-Harvard Center for Ultracold Atoms and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Martin W
authors.initials: MW
authors.lastname: Zwierlein