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Research News

August 14, 2013 | PFC | Research News

Photons a la Mode

The photodetectors in Alan Migdall’s lab often see no light at all, and that’s a good thing since he and his JQI (*) colleagues perform physics experiments that require very little light, the better to study subtle quantum effects. Their latest achievement, described here, is to develop a new way of counting photons to understand the sources and modes of light in modern physics experiments.

August 6, 2013 | PFC | Research News

Resonant Exchange Qubits

Unfortunately, qubits are fragile; they dissipate in the face of interactions with their environment. A new JQI semiconductor-based qubit design ably addresses this issue of qubit robustness.

July 9, 2013 | Research News

A “Hot Spot” for Quantum Information

A JQI-theory/TU Delft-experimental collaboration has recently published results that could be used to rapidly and reliably reset a qubit stored in a semiconductor double quantum dot.

June 18, 2013 | PFC | Research News

Quantum Information in Low Light

JQI researchers in the lab of Alan Migdall, demonstrate how one category of photo-detection system can make highly accurate readings of incoming information at the single-photon level by allowing the detector in some instances not to give a conclusive answer.

June 5, 2013 | PFC | Research News

Spin Hall Effect in a Quantum Gas

JQI Researchers have reported* the first observation of the "spin Hall effect" in a Bose-Einstein condensate.This is a step toward applications in "atomtronics"—the use of ultracold atoms as circuit components.

June 3, 2013 | PFC | Research News

Entanglement in a Flash

JQI researchers under the direction of Chris Monroe have produced quantum entanglement between a single atom’s motion and its spin state thousands of times faster than previously reported, demonstrating unprecedented control of atomic motion.

Coming into Existence
May 20, 2013 | Research News

Coming into Existence

An experiment conducted at the Joint Quantum Institute establishes a new record for heralding efficiency for a pair of entangled photons (particles of light).

May 2, 2013 | PFC | Research News

Turning on Frustration

This week’s issue of Science Magazine features new results from the research group of Christopher Monroe at the JQI, where they explored how to frustrate a quantum magnet comprised of sixteen atomic ions – to date the largest ensemble of qubits to perform a simulation of quantum matter.

Reducing Noise in Qubit Arrays
April 24, 2013 | Research News

Reducing Noise in Qubit Arrays

If quantum computers are ever to be built, qubits will have to be made more robust and more numerous. Qubits can easily lose their orientation in a process called decoherence when confronted with a noisy environment. Also, to enable true quantum computing, they will have to link up in large arrays. New work by scientists at the JQI addresses both of these concerns---noise reduction and scalability.

March 31, 2013 | PFC | Research News

Quantum Dot Commands Light

All computers, even the future quantum versions, use logic operations or “gates,” which are the fundamental building blocks of computational processes. JQI scientists, led by Professor Edo Waks, have performed an ultrafast logic gate on a photon, using a semiconductor quantum dot.

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