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Physics 2, 94 (2009) – Published November 9, 2009 Two separate teams have achieved the long sought after Bose-Einstein condensation of strontium. |
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Physics 2, 87 (2009) – Published October 19, 2009 Interactions among noncondensed bosonic atoms in a trap can cause one species of atoms accelerated by a magnetic field to drag along another species of atoms that would normally not interact with the field. |
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Physics 2, 80 (2009) – Published September 28, 2009 New methods for lowering the entropy of ultracold gases may allow observation of more subtle quantum materials. |
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Physics 2, 76 (2009) – Published September 14, 2009 An electric field can be used to pull on molecular hydrogen’s highly excited outer electron to slow down and trap the molecule. |
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Physics 2, 72 (2009) – Published August 31, 2009 Atomic & Molecular Physics Optics Calculations show that with new short pulse x-ray light sources, it should be possible to use photoelectron emission to make movies of changes in molecular structure. |
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Physics 2, 67 (2009) – Published August 10, 2009 Atomic & Molecular Physics Statistical Mechanics Soft Matter Experiments on melting of small water clusters open the door to the study of the size-dependent phase diagram of water. |
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Physics 2, 68 (2009) – Published August 10, 2009 Atomic & Molecular Physics Particles & Fields Nuclear Physics A huge, predicted atomic parity violation has now been observed in ytterbium, further aiding tabletop experimental searches for physics beyond the standard model that complement ongoing efforts at high-energy colliders. |
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Physics 2, 61 (2009) – Published July 20, 2009 Atomic & Molecular Physics Fluid Dynamics Chaotic matter waves formed by perturbing a Bose-Einstein condensate may provide a valuable laboratory setting for understanding many different kinds of quantum-fluid turbulence. |
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Physics 2, 58 (2009) – Published July 6, 2009 Atomic & Molecular Physics Particles & Fields Measuring quantum interference of atomic matter waves may help detect experimental signatures of a fundamental theory of physics. |
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Physics 2, 48 (2009) – Published June 8, 2009 The fermionic analog of a solid-state polaron (an electron surrounded by a cloud of phonons) has been created by dropping a spin-down atom into a Fermi sea of spin-up ultracold atoms. |
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Physics 2, 45 (2009) – Published June 1, 2009 Atomic & Molecular Physics Optics Dispersive probing of an atomic transition decreases the “dead time” of optical atomic clocks, potentially enabling more stable time reference standards. |
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Physics 2, 41 (2009) – Published May 18, 2009 Atomic & Molecular Physics Quantum Information Optics Loading cold atoms into a hollow-core optical fiber enables all-optical switching with just several hundred photons. |
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Physics 2, 31 (2009) – Published April 20, 2009 In a cooled and trapped cloud of ytterbium atoms, the transition from a superfluid to an insulating state has been observed, opening up new possibilities for precision measurements, optical clocks, and quantum computing. |
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Physics 2, 29 (2009) – Published April 13, 2009 Inelastic light scattering is used to study correlated phases of one-dimensional Bose gases. This spectroscopic technique can distinguish superfluid and insulating phases and allow identification of the transition from one to the other. |
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Physics 2, 26 (2009) – Published April 6, 2009 An ultracold atomic physics experiment reveals universal physics in a four-body system. |
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Physics 2, 25 (2009) – Published March 30, 2009 Trapped cold atom gases mimic much of the behavior of electrons in a solid, but because the atoms are neutral, it is difficult to imitate the physics of electrons moving in a magnetic field. Now, experiments show that a suitable combination of lasers can create an artificial magnetic field for cold atoms. |
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Physics 2, 23 (2009) – Published March 23, 2009 Atomic & Molecular Physics Interdisciplinary Physics Stochastic resonance, in which a periodic signal applied to a nonlinear system can be amplified by adding noise, has been observed in a mechanical system and predicted to occur in a Bose-Einstein condensate. |
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Physics 2, 19 (2009) – Published March 9, 2009 An atomic physics experiment demonstrates a solution to an eighty-year-old quantum conundrum by mimicking in an atom the astronomical problem of a satellite moving in a sun-earth system. |
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Physics 2, 9 (2009) – Published February 2, 2009 Atomic & Molecular Physics Superfluidity Recent calculations of the properties of ultracold atoms have revealed how two-body interactions at very short distances determine essential properties of many-body systems. |
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Physics 1, 41 (2008) – Published December 15, 2008 Disorder in a crystal tends to localize electrons and drive a transition from a metallic to an insulating state. The same localization can occur in cold atom gasses in a periodic optical trap, but since the trap is tunable it may be possible to explore this effect in multiple dimensions. |
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Physics 1, 27 (2008) – Published October 6, 2008 Spin dependence of atomic and electronic interactions can give rise to propagating regions of aligned spins in solids called spin waves. These have now been observed in a gas of ultracold fermionic atoms. |
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Physics 1, 25 (2008) – Published September 29, 2008 Paramagnetic atoms and molecules experience a force in a magnetic field and scientists have now used this force to decelerate and trap hydrogen atoms. This method promises new opportunities for precision measurements on hydrogen isotopes and may be applied to a host of atoms and molecules for which existing cooling techniques fail. |
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Physics 1, 24 (2008) – Published September 25, 2008 Atoms colliding in a magnetic field can form weakly bound states called Feshbach molecules. These states have now been used in combination with advanced laser techniques to create tightly bound ground-state molecules close to quantum degeneracy. |
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Physics 1, 13 (2008) – Published August 18, 2008 A Bose-Einstein condensate (BEC) can dramatically collapse and explode when the interactions between the atoms are sufficiently strong and attractive. Now, scientists have imaged the anisotropic, clover-leaf shape of such a collapsing gas when the attractive atomic interactions are strongly dipolar. |
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Physics 1, 10 (2008) – Published August 4, 2008 Atomic & Molecular Physics String Theory Results from string theory, generalizing the anti-de Sitter/conformal field theory correspondence, may offer a fresh set of mathematical tools for understanding some kinds of phase transitions that occur in cold atomic systems. |
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