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Latest News and Research

Semiconductor quantum transistor opens the door for photon-based computing

Transistors are tiny switches that form the bedrock of modern computing—billions of them route electrical signals around inside a smartphone, for instance.

Quantum computers will need analogous hardware to manipulate quantum information. But the design constraints for this new technology are stringent, and today’s most advanced processors can’t be repurposed as quantum devices. That’s because quantum information carriers, dubbed qubits, have to follow different rules laid out by quantum physics. 

Scientists can use many kinds of quantum particles as qubits, even the photons that make up light. Photons have added appeal because they can swiftly shuttle information over long distances and they are compatible with fabricated chips. However, making a quantum transistor triggered by light has been challenging because it requires...Continue Reading

Quantum gas reveals first signs of path-bending monopole

Magnets, whether in the form of a bar, horseshoe or electromagnet, always have two poles. If you break a magnet in half, you’ll end up with two new magnets, each with its own magnetic north and south.But some physics theories predict the existence of single-pole magnets—a situation akin to electric charges, which come in either positive or negative chunks. One particular incarnation—called the Yang monopole after its discoverer—was originally predicted in the context of high-energy physics, but it has never been observed. Now, a team at JQI led by postdoctoral researcher Seiji Sugawa and JQI Fellow Ian Spielman have succeeded in... Continue Reading

Eliot Fenton recognized as a Maryland ‘Undergraduate Researcher of the Year’

Eliot Fenton, UMD physics major, was among those recognized as a 2018 Maryland ‘Undergraduate Researcher of the Year.’ This award is eligible for exemplary seniors who have been nominated by their faculty advisors.  Fenton earned this award for his wide-ranging experimental physics research accomplishments.

From 2015-2017 Fenton worked on optical nanofibers with JQI Fellow and UMD Physics Professor Luis Orozco. Recently, Fenton along with fellow undergraduate researcher Adnan Khan (now a graduate student at University of Washington), together with colleagues, published a study of how light interacts with an optical nanofiber’s mechanical movements. Last year, Fenton co-authored a paper that detailed precise measurements of an...Continue Reading

JQI alumnus Pablo Solano awarded dissertation prize

Pablo Solano, a recent graduate student with JQI Fellow and UMD physics professor Luis Orozco, has been awarded the Charles A. Caramello Distinguished Dissertation Prize. According to the official award description, the prize recognizes “original work that makes an unusually significant contribution to its discipline.” The prize is given in four broad disciplinary areas and comes with an honorarium.

Solano received the prize in the area of Mathematics, Physical Sciences, and Engineering for his dissertation titled “Quantum Optics in Optical Nanofibers”. His research focused on studying the properties of light as it propagates through optical nanofibers, and how such a system enables special atom-light interactions. His thesis work was nominated by the...Continue Reading

Latest nanowire experiment boosts confidence in Majorana sighting
New test matches theory and offers the best evidence yet for the oddball particles.

In the latest experiment of its kind, researchers have captured the most compelling evidence to date that unusual particles lurk inside a special kind of superconductor. The result, which confirms theoretical predictions first made nearly a decade ago at the Joint Quantum Institute (JQI) and the University of Maryland (UMD), will be published in the April 5 issue of Nature. The stowaways, dubbed Majorana quasiparticles, are different from ordinary matter like electrons or quarks—the stuff that makes up the elements of the periodic table. Unlike those particles, which as far as physicists know can’t be broken down into more basic pieces, Majorana... Continue Reading

Two-toned light pattern creates steep quantum walls for atoms
A new landscape promises to bring ultracold atomic neighbors closer than ever before

Exotic physics can happen when quantum particles come together and talk to each other. Understanding such processes is challenging for scientists, because the particle interactions can be hard to glimpse and even harder to control. Moreover, modern computer simulations struggle to make sense of all the intricate dynamics going on in a large group of particles. Luckily, atoms cooled to near zero temperatures can provide insight into this problem.Lasers can make cold atoms mimic the physics seen in other systems—an approach that is familiar terrain for atomic physicists. They regularly use intersecting laser beams to capture atoms in a landscape... Continue Reading

JQI Fellow Barkeshli receives 2018 Sloan Research Fellowship

Maissam Barkeshli, an assistant professor of physics at the University of Maryland and fellow of the Joint Quantum Institute, has been awarded a 2018 Sloan Research Fellowship. Granted by the Alfred P. Sloan Foundation, this award identifies 126 early-career scientists based on their potential to contribute fundamentally significant research to a wider academic community. Barkeshli, a theoretical condensed matter physicist interested in complex quantum many-body phenomena, will use the fellowship to further his research into the collective behavior that emerges in systems of strongly interacting particles governed by the laws of quantum mechanics.“I am honored to receive this prestigious fellowship,” said... Continue Reading

New hole-punched crystal clears a path for quantum light
Photonic chip guides single photons, even when there are bends in the road.

Optical highways for light are at the heart of modern communications. But when it comes to guiding individual blips of light called photons, reliable transit is far less common. Now, a collaboration of researchers from the Joint Quantum Institute (JQI), led by JQI Fellows Mohammad Hafezi and Edo Waks, has created a photonic chip that both generates single photons, and steers them around. The device, described in the Feb. 9 issue of Science, features a way for the quantum light to seamlessly move, unaffected by certain obstacles."This design incorporates well-known ideas that protect the flow of current in certain electrical devices," says Hafezi.... Continue Reading

Latest News and Research

  • Semiconductor quantum transistor opens the door for photon-based computing
  • Quantum gas reveals first signs of path-bending monopole

    Magnets, whether in the form of a bar, horseshoe or electromagnet, always have two poles. If you break a magnet in half, you’ll end up with two new magnets, each with its own magnetic north and south.But some physics theories predict the existence of single-pole magnets—a situation akin to electric charges, which come in either positive or negative chunks. One particular incarnation—called the... Continue Reading

  • Eliot Fenton recognized as a Maryland ‘Undergraduate Researcher of the Year’
  • JQI alumnus Pablo Solano awarded dissertation prize
  • Latest nanowire experiment boosts confidence in Majorana sighting
    New test matches theory and offers the best evidence yet for the oddball particles.

    In the latest experiment of its kind, researchers have captured the most compelling evidence to date that unusual particles lurk inside a special kind of superconductor. The result, which confirms theoretical predictions first made nearly a decade ago at the Joint Quantum Institute (JQI) and the University of Maryland (UMD), will be published in the April 5 issue of Nature. The... Continue Reading

  • Two-toned light pattern creates steep quantum walls for atoms
    A new landscape promises to bring ultracold atomic neighbors closer than ever before

    Exotic physics can happen when quantum particles come together and talk to each other. Understanding such processes is challenging for scientists, because the particle interactions can be hard to glimpse and even harder to control. Moreover, modern computer simulations struggle to make sense of all the intricate dynamics going on in a large group of particles. Luckily, atoms cooled to near... Continue Reading

  • JQI Fellow Barkeshli receives 2018 Sloan Research Fellowship

    Maissam Barkeshli, an assistant professor of physics at the University of Maryland and fellow of the Joint Quantum Institute, has been awarded a 2018 Sloan Research Fellowship. Granted by the Alfred P. Sloan Foundation, this award identifies 126 early-career scientists based on their potential to contribute fundamentally significant research to a wider academic community. Barkeshli, a... Continue Reading

  • New hole-punched crystal clears a path for quantum light
    Photonic chip guides single photons, even when there are bends in the road.

    Optical highways for light are at the heart of modern communications. But when it comes to guiding individual blips of light called photons, reliable transit is far less common. Now, a collaboration of researchers from the Joint Quantum Institute (JQI), led by JQI Fellows Mohammad Hafezi and Edo Waks, has created a photonic chip that both generates single photons, and steers them around. The... Continue Reading

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