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Quantum point contact
September 18, 2014 | Research News

Two-dimensional electron liquids

A relatively new frontier for studying 2D matter is provided by planar collections of electrons at the surface of transition-metal-oxide (TMO) materials, in which high electron densities give rise to interactions that are stronger than in semiconductors. Before he left Stanford University, new JQI Fellow and UMD Professor James Williams and his colleagues performed tests on a thin sample of strontium titanate (STO) covered over with an electrolyte gel, a material in which negative and positive ions dissociate (saltwater is a common electrolyte: Na+ and Cl- ions come apart in a water solution). Their results appear in the journal Nature Physics.

September 2, 2014 | Research News

Cool Calculations for Cold Atoms

Two scientists at the Joint Quantum Institute have formulated a universal theory to describe the properties of Efimov states, a theory that, for the first time, does not need extra adjustable unknown parameters . This should allow physicists to predict the rates of chemical processes involving three atoms -- or even more -- using only a knowledge of the interaction forces at work.

August 28, 2014 | Research News

Sprinkling Spin Physics onto a Superconductor

JQI Fellow Jay Sau, in collaboration with physicists from Harvard and Yale, has been studying the effects of embedding magnetic spins onto the surface of a superconductor. They recently report that the spins can interact differently than previously thought. This hybrid platform could be useful for quantum simulations of complex spin systems, having the special feature that the interactions may be controllable, something quite unusual for most condensed matter systems.

August 21, 2014 | Research News

On-chip Topological Light

JQI researchers led by Mohammad Hafezi report detailed measurements of the transmission (how much energy is lost) and delay for edge-state light and for bulk-route light on a photonic chip.

July 31, 2014 | People News

Two JQI undergraduates honored for their thesis work

Ike Uchenna Chukwu and Burkley Patterson were recently both named recipients of the 2014 IPST Monroe Martin Prize for Undergraduate Research in Physics. 

Burkley's work was titled "Construction and Experiments with a Cavity QED system." He will be continuing his work, now as a graduate student, in Luis Orozco's Cavity QED experiment, which is supported by NSF.

July 31, 2014 | PFC | Research News

Spin Diagnostics

Recently physicists led JQI Fellow Christopher Monroe have executed an MRI-like diagnostic on a crystal of interacting quantum spins. They predict that their method is scalable and may be useful for validating experiments with much larger ensembles of interacting spins.

July 17, 2014 | Research News

Highly-Charged Ions

A new theoretical study conducted by JQI adjunct fellow Marianna Safronova and her colleagues from groups around the world provides the best yet study of how highly charged ions could be used for atomic timekeeping and for processing quantum information.

July 10, 2014 | People News

Steve Rolston Named Recipient of Kirwan Undergraduate Education Award

Steve Rolston has been choosen as the recipient of the Kirwan Undergraduate Education Award for 2014. The prestigious award recognizes a faculty member who has made exceptional contributions to the quality of undergraduate education at the university.

July 9, 2014 | PFC | Research News

Making Quantum Connections

In quantum mechanics, interactions between particles can give rise to entanglement, which is a strange type of connection that could never be described by a non-quantum, classical theory. These connections, called quantum correlations, are present in entangled systems even if the objects are not physically linked (with wires, for example). Entanglement is at the heart of what distinguishes purely quantum systems from classical ones; it is why they are potentially useful, but it sometimes makes them very difficult to understand.

July 7, 2014 | People News

JQI publications in 2014 Google Scholar Metrics

On June 26, Google released its 2014 version of Scholar Metrics, which highlights influential scientific papers published between 2009 and 2013. Papers are selected by an algorithm that selects those that are the most-cited in their subject, according to the Google Scholar database.

July 2, 2014 | Research News

Superconducting-Silicon Qubits

Theorists propose a way to make superconducting quantum devices such as Josephson junctions and qubits, atom-by-atom, inside a silicon crystal.

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