News: Research Highlights

Sat January 1, 2011

Evolution of Fermion Pairing from Three to Two Dimensions

Interacting fermions in coupled two-dimensional (2D) layers present unique physical phenomena and are central to the description of unconventional superconductivity in high-transition-temperature cuprates and layered organic conductors. Reduced dimensionality enhances the effect of fluctuations, while interlayer coupling can stabilize superconductivity and even amplify the transition temperature. A fermionic superfluid loaded into a periodic potential should...
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Research Highlights
Sat January 1, 2011

Relaxation of Fermionic Excitations in a Strongly Attractive Fermi Gas in an Optical Lattice, Phys. Rev. Lett., 107 145303 (2011).

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Research Highlights
Sat January 1, 2011

Revealing the Superfluid Lambda Transition in the Unviersal Thermodynamics of a Unitary Fermi Gas

Fermi gases, collections of fermions such as neutrons and electrons, are found throughout nature, from solids to neutron stars. Interacting Fermi gases can form a superfluid or, for charged fermions, a superconductor. We have directly observed the superfluid phase transition in a strongly interacting Fermi gas via high-precision measurements of the local compressibility, density and...
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Research Highlights
Sat January 1, 2011

Feynman diagrams versus Feynman quantum emulator

Precise understanding of strongly interacting fermions, from electrons in modern materials to nuclear matter, presents a major goal in modern physics. However, the theoretical description of interacting Fermi systems is usually plagued by the intricate quantum statistics at play. Here we present a cross-validation between a new theoretical approach, Bold Diagrammatic Monte Carlo (BDMC), and...
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Research Highlights
Sat January 1, 2011

Cold Heteromolecular Dipolar Collisions

We present the first experimental observation of cold collisions between two different species of neutral polar molecules, each prepared in a single internal quantum state. Combining for the first time the techniques of Stark deceleration, magnetic trapping, and cryogenic buffer gas cooling allows the enhancement of molecular interaction time by 10,000. This has enabled an...
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Research Highlights
Fri January 1, 2010

States of an Ensemble of Two-Level Atoms with Reduced Quantum Uncertainty

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Research Highlights
Fri January 1, 2010

Coherent recoilless scattering of atoms

Two papers were finished recently on the subject of recoilless scattering from a gas and scattering from atoms in an optical lattice as a probe of the quantum state of the lattice.
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Research Highlights
Fri January 1, 2010

Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock

Atomic Clock Beats the Quantum Limit

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Research Highlights
Fri January 1, 2010

Probing quantum phase transitions at the single-atom level

Physicists Get an Up–Close Look at Synthetic Quantum Materials

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Research Highlights
Fri January 1, 2010

Probing the Superfluid?to?Mott Insulator Transition at the Single-Atom Level

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News type:
Research Highlights