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Research News

April 15, 2008 | Research News

An STM to Measure Phase Differences in Superconductors

Twenty years after the discovery of high temperature superconductors, the mechanisms that cause those materials to lose electrical resistance remain unknown. To understand the phenomenon, researchers will have to determine precisely which aspects of a material’s atomic configuration contribute to superconductivity, and to measure telltale differences at the atomic scale between very slightly different arrangements in a material’s crystal lattice.

April 9, 2008 | Research News

Closing the Detection Loophole Over a Meter

JQI/UMD researchers have increased by five orders of magnitude the distance over which a highly stringent test of a key quantum-mechanical principle can be successfully conducted. In doing so, Chris Monroe and colleagues* validated a technique that could eventually lead to final resolution of a 70-year-old debate over the nature of physical reality that pitted Albert Einstein against Niels Bohr.

April 2, 2008 | Research News

Twin Beams for Quantum Imaging

JQI researchers have demonstrated a specially interconnected pair of “squeezed light” beams, reduced-noise optical waves whose properties are related to each other to a degree greater than allowed by classical physics.

March 27, 2008 | Research News

Controlling Decoherence

To scientists seeking a basis for future quantum information processing, there is no more urgent or vexing problem than delaying the onset of “decoherence” – the collapse of delicate, but essential, quantum states.

Lyman alpha photons
March 26, 2008 | Research News

Neutron Detection by Light: A 100-fold Improvement

JQI researchers have developed a new optical method to detect individual neutrons and record them over a range of intensities at least a hundred times greater than existing detectors.

Sub-femtosecond precision, NIST
March 20, 2008 | Research News

Sub-Femtosecond Stop Watch For 'Photon Finish' Races

Using a system that can compare the travel times of two photons with sub-femtosecond precision, scientists at the Joint Quantum Institute (a partnership of the National Institute of Standards and Technology (NIST) and the University of Maryland) and Georgetown University have found a remarkably large difference in the time it takes photons to pass through nearly identical stacks of materials with different arrangements of refractive layers.

Proton and Triton
March 10, 2008 | Research News

New Detector Can ‘See’ Single Neutrons Over Broad Range

Researchers at the National Institute of Standards and Technology (NIST) and the University of Maryland have developed a new optical method that can detect individual neutrons and record them over a range of intensities at least a hundred times greater than existing detectors.

Ultracold atoms, NIST
March 10, 2008 | Research News

Stunt Doubles: Ultracold Atoms Could Replicate the Electron ‘Jitterbug’

Ultracold atoms moving through a carefully designed arrangement of laser beams will jiggle slightly as they go, two NIST scientists have predicted. If observed, this never-before-seen “jitterbug” motion would shed light on a little-known oddity of quantum mechanics arising from Paul Dirac’s 80-year-old theory of the electron.

March 5, 2008 | Research News

’Loopy’ Photons Test Hidden-Variable Predictions

JQI researchers have devised a new method for creating pairs of entangled photons to test key postulates of quantum mechanics.

Persistent Flow in a Gas
December 14, 2007 | Research News

NIST Announces First Observation of ‘Persistent Flow' in a Gas

Using laser light to stir an ultracold gas of atoms, researchers at the National Institute of Standards and Technology (NIST) and the Joint Quantum Institute (NIST/University of Maryland) have demonstrated the first “persistent” current in an ultracold atomic gas —a frictionless flow of particles.

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