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February 8, 2009 | Research News

Entangled Images and Delayed EPR Entanglement

Pushing the envelope of Albert Einstein’s “spooky action at a distance,” known as entanglement, researchers at the Joint Quantum Institute (JQI) of the Commerce Department’s National Institute of Standards and Technology (NIST) and the University of Maryland have demonstrated a “quantum buffer,” a technique that could be used to control the data flow inside a quantum computer.

Quantum computers could ...

Teleportation Diagram
January 2, 2009 | Research News

First Teleportation Between Distant Atoms

For the first time, scientists have successfully teleported information between two separate atoms in unconnected enclosures a meter apart – a significant milestone in the global quest for practical quantum information processing.

Teleportation may be nature’s most mysterious form of transport: Quantum information, such as the spin of a particle or the polarization of a photon, is transferred from one ...

December 15, 2008 | Research News

Topological Insulators

Most quantum phenomena are notoriously difficult to observe, and therefore to manipulate, measure and, ultimately, understand. That is especially true for a newly discovered class of condensed-matter states called topological insulators (TIs). But now PFC scientists* are devising a method that could allow direct observation of these exotic entities.

TIs form in certain materials that, in bulk, have the distinctive ...

A common configuration for photonic crystal fabrication with imbedded dots.
November 18, 2008 | Research News

Quantum Dots in Photonic Crystals

Every day, a growing amount of the world’s information moves at the speed of light in the form of photons that fly through optical fibers. And increasingly, society is depending on quantum information science to ensure that critical communications traveling over those lines can be made impregnably secure.

There are many possible ways of reaching that goal, and JQI Fellow ...

November 4, 2008 | Research News

Lattice Perturbations Cause Disproportionate Effects

JQI researchers have discovered a surprising phenomenon, akin to a phase transition, that occurs when atoms cooled into a Bose-Einstein condensate (BEC) are placed in an optical lattice produced by a single laser beam and then exposed to an extremely weak perturbation from one or more additional beams. The presence of the perturbing beam/s causes a dramatic change in the ...

PFC Group Photo
September 25, 2008 | Research News

JQI Awarded New Physics Frontier Center

The National Science Foundation has awarded theJoint Quantum Institute $12.5 million over five years to create and operate a Physics Frontier Center (PFC) at the University of Maryland (UMD) College Park campus. The center will pursue cutting-edge investigations of coherence and entanglement -- two fundamental elements of the physics of quantum information.

The PFC award will fund 17 graduate students, ...

Quantum Dots in a Whole New Light
September 24, 2008 | Research News

Quantum Dots in a Whole New Light

A team headed by JQI Fellow Glenn Solomon of NIST has reached a new milestone in understanding and manipulating the exotic creations called “quantum dots,” or QDs for short (see reference publication).

QDs are artificial three-dimensional structures, made of semiconductor material, that are only a few tens of nanometers at their widest. That’s small: About 1,000 dots placed side by ...

Ultracold Polar Molecules
September 18, 2008 | Research News

Ultracold Polar Molecules

Scientists at JILA, a joint institute of the National Institute of Standards and Technology (NIST), the University of Colorado at Boulder (CU-Boulder) and the Joint Quantum Institute have applied their expertise in ultracold atoms and lasers to produce the first high-density gas of ultracold molecules—two different atoms bonded together—that are both stable and capable of strong interactions.

A JQI team wants to see to what extent a toroid BEC (yellow) will act like a SQUID, with a sheet of light (green) functioning as a tunnel barrier, and its motion serving as magnetic field in a superconducting Josephson junction.
September 15, 2008 | Research News

Stirring Up New Physics in Toroidal BECs

Quantum effects don’t usually intrude into daily life. That’s a fortunate state of affairs for a person who needs to know, say, the position and speed of his car at the same time.

September 9, 2008 | Research News

Spin Control: Modeling the Transistor of the Future

The Next Big Thing in microelectronics will be extremely small. And it probably will not be entirely electronic. As transistor dimensions continue to shrink, and computing demands continue to grow, pushing bunches of electrical charges around in semiconductors can start to look like an awfully bulky, slow and power-hungry business. So in addition to expressing digital information as the presence ...

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