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Opening A Remote Quantum Gate
July 21, 2009 | Research News

Opening a Remote Quantum Gate

Physicists have created and demonstrated a remote “quantum gate” – a key component for long-range quantum information transfer and an essential element of one plan for a quantum computer – by carefully manipulating the atomic states of two separately trapped ions.

Controlling Bits
July 7, 2009 | Research News

Controlling Individual Bits

Physicists at the National Institute of Standards and Technology (NIST) have overcome a hurdle in quantum computer development, having devised* a viable way to manipulate a single “bit” in a quantum processor without disturbing the information stored in its neighbors.

June 4, 2009 | Research News

Improving Josephson Junction Qubits

An interdisciplinary research collaboration, centered at the University of Maryland (UMD) at College Park, has been awarded $2.8 million from the Intelligence Advanced Research Projects Activity (IARPA) through the Army Research Office (ARO) to devise, fabricate, study and test a new kind of key component for quantum computing.

The scientists will work on novel methods of constructing the crucial, ultra-thin ...

May 25, 2009 | Research News

New System for Detection of Single Atoms

Scientists have devised a new technique for real-time detection of freely moving individual neutral atoms that is more than 99.7% accurate and sensitive enough to discern the arrival of a single atom in less than one-millionth of a second, about 20 times faster than the best previous methods.

The system, described in Advance Online Publication at the Nature Physics web ...

Paul Julienne and Chris Monroe, JQI
May 6, 2009 | Research News

JQI Wins Two MURI Awards for FY2009

Joint Quantum Institute researchers have won two highly sought-after MURI awards from the U.S. Department of Defense out of 41 projects selected for funding in a nationwide competition. The Pentagon will provide a total of $260 million over five years to the FY2009 awardees in the Multidisciplinary University Research Initiative (MURI) program, with specific allocations to be determined in subsequent ...

NIST Researcher Jun Ye
April 17, 2009 | Research News

New Standard of Accuracy for Strontium Clocks

Described in the April 17 issue of the journal Science,* the research was performed at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado (CU) at Boulder.

April 3, 2009 | Research News

Strange Events in Flatland

If physicists lived in Flatland—the fictional two-dimensional world invented by Edwin Abbott in his 1884 novel—some of their quantum physics experiments would turn out differently (not just thinner) than those in our world.

Neutron absorption by 3He yields tens of Lyman alpha photons, which result from the most fundamental energy jump in the hydrogen atom. This schematic illustrates the operation of a prototype Lyman alpha neutron detector (LAND).
March 20, 2009 | Research News

Raising the Rate of Single-Photon Detection

JQI researchers have devised and demonstrated a novel solution to a growing problem in quantum optics: the limited detection rate of single-photon detectors. Those devices, which are increasingly in demand for applications such as quantum key distribution and metrology, require a brief recovery interval – called “deadtime” – after each detection.

"Dressing" a Bose-condensed gas of neutral rubidium atoms in a particular way gives the atoms a vector potential -- an effective directional tendency equivalent to what a charged particle would experience in a magnetic field.
March 7, 2009 | Research News

Dressing Up Rubidium for Quantum Computing

Neutral atoms—having no net electric charge—usually don't act very dramatically around a magnetic field. But by “dressing them up” with light, Joint Quantum Institute (JQI) researchers have caused ultracold rubidium atoms to undergo a startling transformation. They forced a cloud of neutral atoms to act like point-like charged particles that can undergo merry-go-round-like cyclotron motions just as electrons do when ...

March 3, 2009 | Research News

Making Supersolids with Ultracold Atoms

The Flash, a comic-book superhero, can walk through solid walls by vibrating fast enough. Physics hasn’t quite gotten there yet, but JQI researchers predict that in a weird new state of matter called a “supersolid” two types of atoms could flow through each other frictionlessly while each maintaining a regular crystalline arrangement.

Earlier this year the JQI team proposed a ...