UMD Researchers Included in New NSF Quantum Initiatives

The National Science Foundation (NSF) announced a $5 million, two-year award to a University of Maryland-led multi-institutional team to develop quantum interconnects—crucial technology to connect quantum computers and pave the way for a quantum internet.

The team, QuaNeCQT (Quantum Networks to Connect Quantum Technology), has been developing the quantum versions of a modem and a router—familiar equipment in the world of standard, or “classical” computing, but a challenge to build for use with devices that operate based on the principles of quantum.

The devices allow “ion trap” quantum computers—a leading approach to quantum information processing developed in part at the University of Maryland—to exchange quantum information over distances measured in kilometers, eventually leading to the development of networks that could revolutionize numerous industries and help solve vexing societal problems.

Quantum networks are at an inflection point with the potential for significant expansion, said Edo Waks, a professor of electrical and computer engineering and of physics and the associate director of UMD’s Quantum Technology Center (QTC). But the scale-up can’t happen without standardized modular hardware between the new computers that are emerging and the vast infrastructure of the current internet.

“The hardware we are developing will address the critical gap, opening up the door to the future quantum internet that can connect quantum computers over continental distances,” said Waks.

Other UMD team members include physics Assistant Professor and QTC Fellow Norbert Linke, and Mid-Atlantic Crossroads (MAX) Executive Director Tripti Sinha, assistant vice president and chief technology officer for UMD’s Division of Information Technology. The team also includes Dirk Englund of the Massachusetts Institute of Technology and Saikat Guha of the University of Arizona.

The researchers plan to deploy this new technology in the Mid-Atlantic Region Quantum Internet (MARQI), UMD's regional quantum network footprint. The MARQI network will interconnect quantum computers at UMD, the Army Research Laboratory, MAX and IonQ—a leading quantum computing company focused on ion-trap computers that operates in UMD’s Discovery District—with a potential for significant expansion.

During the first phase of research, the team developed working prototypes of the quantum router and modem. Using a process called quantum frequency conversion, the modem converts signals from a quantum computer to infrared photons that can propagate through optical fibers over long distances. The router is powered by a silicon photonic chip that manipulates quantum signals in the network using quantum teleportation—an effect demonstrated in 2009 by researchers at UMD’s Joint Quantum Institute that allows quantum states to be transferred between particles that are physically separate. The team has deployed these prototypes in the MARQI network and established direct links with the various nodes of the network.

A quantum network could revolutionize numerous industries that take advantage of quantum computing including computing, banking, medicine and data analytics It would also enable connection of many multiple small quantum computers into powerful distributed quantum computers that could potentially solve problems with significant societal impact, from curing diseases to new approaches to fighting climate change.

As quantum technology converges with the Internet, a new technology sector would emerge, the researchers say, bringing with it the potential for major economic growth by producing rapid technological innovation and creating a large number of new jobs for the future “quantum workforce,” just as the emergence of the Internet did toward the late 20th century.

In addition, The National Science Foundation has announced a five-year, $25 million grant to fund a multi-institutional center including the University of Maryland that will conduct research to bring atomic-level precision to the devices and technologies that underpin much of modern life.

The Center for Integration of Modern Optoelectronic Materials on Demand (IMOD) is a collaboration of scientists and engineers at 11 universities led by the University of Washington. UMD faculty involved with IMOD include three professors of electrical and computer engineering and physics: WaksRonald Walsworth, founding director of the QTC; and Mohammad Hafezi, a fellow of QTC.

IMOD research will center on new semiconductor materials and scalable manufacturing processes for new devices based on optoelectronics, the study and application of electronic devices that produce, detect and control light. Applications would range from displays and sensors to a technological revolution, under development today, that’s based on harnessing the principles of quantum mechanics.

“Our work will develop new classes of colloidal materials that can generate quantum light with unprecedented efficiency, and enable strong photon-photon interactions,” said Waks, who serves as UMD’s lead investigator. “These are the key building blocks for photonics-based quantum information processing.”

The goal of the center is to realize high-impact platforms for quantum networking and sensing, Walsworth said.

“As a key part of IMOD, QTC researchers will lead efforts to establish a new class of quantum materials that combine pristine optical properties and long qubit coherence times,” he said.

The other academic institutions in IMOD are the University of Pennsylvania; Lehigh University; Columbia University; Georgia Institute of Technology; Northwestern University; City College of New York; the University of Chicago; the University of Colorado at Boulder and the University of Maryland, Baltimore County.

External partners include Amazon, Corning, Microsoft and Nanosys, as well as government organizations like the National Renewable Energy Laboratory and the Pacific Northwest National Laboratory.

Adapted from stories by Kara Stamets:

Janet Das Sarma Memorial CMTC Conference Scheduled for December

The 2021 Janet Das Sarma Memorial CMTC Conference, a scientific gathering in memory of Janet Das Sarma, will be held on Dec. 18, 2021, at The Hotel at UMD. For years, Janet played a crucial behind-the-scenes role in the growth, development and success of the Condensed Matter Theory Center at the University of Maryland, working up until her death on December 2, 2019. 
This one-day conference will include eight scientific talks covering frontier areas of condensed matter physics that have been the center of activity at CMTC, delivered by scientists who knew Janet the longest. The talks will be followed by a dinner and formal remembrances of Janet by the attendees, celebrating her role in the success of CMTC. The plan is for attendees to arrive on Friday, December 17 and depart on Sunday, December 19.
Space is limited, so please contact Rebecca Cawthorne at This email address is being protected from spambots. You need JavaScript enabled to view it. if you are interested in attending. All local expenses (hotel, food, coffee breaks, etc.) will be covered by CMTC. For those who want to spend a few extra days at CMTC doing physics, the appropriate office space will be made available.

For more information, please click here.

Buonanno Receives Balzan Prize

Alessandra Buonanno has been awarded the Balzan Prize, along with Thibault Damou of the Institut des Hautes Études Scientifiques in France, for pioneering work in gravitational waves. They will share the 750,000 Swiss franc award.

Buonanno is the director of the Astrophysical and Cosmological Relativity Department at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in Potsdam and a Research Professor at the University of Maryland.

She joined the UMD Department of Physics in 2005, and received an Alfred P. Sloan Foundation Fellowship and the Richard A. Ferrell Distinguished Faculty Fellowship. She is a Fellow of the American Physical Society and the International Society of General Relativity and Gravitation. In 2018, she received the Leibniz Prize, Germany's prestigious research award. Earlier in 2021, she was elected to the U.S. National Academy of Sciences and was awarded the Galileo Galilei Medal of the National Institute for Nuclear Physics (INFN). Alessandra Buonanno © A. Klaer Alessandra Buonanno © A. Klaer Buonanno was also recently elected to the German National Academy of Sciences Leopoldina, which originated in 1652 as a classical scholarly society, and she received the Dirac Medal, along with Damour, Frans Pretorius, and Saul Teukolsky. 

Buonanno's research has spanned several topics in gravitational-wave theory, data-analysis and cosmology. She is a Principal Investigator of the LIGO Scientific Collaboration, and her waveform modeling of cosmological events has been crucial in the experiment’s many successes.

Buonanno, Charlie Misner, Peter Shawhan and others detailed UMD's contributions to gravitational studies in a 2016 forum, A Celebration of Gravitational Waves

Quantum Materials Center’s Silent Hero Recognized with College Award

Doug BensenDoug BensenWhen responding to an interview request for this story, Douglas Bensen (B.S. ’85, industrial education), who has worked at the University of Maryland for 35 years, warned that he might be a boring subject. His title on the Department of Physics website is the generic “coordinator” after all.

But when speaking to those who have benefited directly from Bensen’s expertise, it becomes apparent that “coordinator” in this case stands for “The Person that Makes Things Work.”

“If something breaks, I text Doug, and I know the problem is going to be gone,” said Sam Deitemyer, a physics graduate student at UMD who works in the Quantum Materials Center (QMC).

Deitemyer’s experience is typical for graduate students working in QMC labs. Through the years, whenever something has gone wrong, something needed maintenance or a new piece of equipment needed to be installed, Bensen has been there making things work and sharing his knowledge along the way.

“It's really great when Doug's there fixing something,” Deitemyer said. “I mean, it's always bad when things break, but it's a good learning opportunity for me. I've gotten to learn how to do a lot of stuff myself, because Doug’s not just good at fixing stuff, he's good at teaching people while he's doing it.”

It’s Bensen’s brand of boring—being quietly consistent and under-the-radar indispensable—that earned him the Dean’s Outstanding Employee Award from UMD’s College of Computer, Mathematical, and Natural Sciences in spring 2021. The students Bensen helped were looking for a way to give back, and the idea of nominating Bensen for the Dean’s award caught on, thanks to Deitmeyer.

“I don't know the total number of nominations,” Deitmeyer said, “but I know he helped me and helps everyone that I know in this building.”

Bensen cultivated his penchant for fixing things from an early age. When he was nine years old, soon after his family moved to Maryland, he started taking apart and rebuilding lawn mowers and go-karts.

“I learned a lot of things on my own—how to weld, how to restore and paint cars, and all the mechanics that go with bringing them back to life,” Bensen said. “Really, you learn how to do things if you want to play. And my dad was very supportive, making sure I was always having fun. His attitude was, ‘Here are some tools, don't kill yourself.’”

When Bensen started college at UMD in 1982, he was planning to become an Earth science teacher. But, like many college students, Bensen struggled during his first semester. Looking for classes that were more in his wheelhouse, he stumbled into an industrial education program and found his stride.

“We had welding, we had foundry, we had machine shop, we had plastics technology, we had metallurgy. We had a lot of classes that were very hands on,” Bensen said. “For somebody like me who's been building go-karts and different cars since I was a little guy, it felt like, ‘How can this be school?’”

After graduation, Bensen took a job with the UMD High Energy Physics group.

“One of the guys I studied with had a part-time job working for High Energy Physics on campus,” Bensen said. “He said to me, ‘If you’re looking for something to do, a job until you find a real job, we could use you for maybe a year, year-and-a-half.’”

Thirty-five years later, Bensen said he’s still waiting on that real job, but he has no regrets.

“UMD is like a small little community,” he said. “The environment here is incredibly comfortable. You have something here that you don't have in a lot of jobs, which is freedom. If you’re not happy, you can do other things or explore other things.”

After a year with the High Energy Physics group, Bensen moved to plasma physics, working in the machine shop and supporting the free-electron laser group and gyroklystron (a version of a klystron microwave amplification device) group in what is now the Institute for Research in Electronics and Applied Physics (IREAP). In 1991, he moved to the Center for Superconductivity Research, and has remained there, watching it transform into the Center for Nanophysics and Advanced Materials and now the QMC.

In describing his office, Bensen said it’s perpetually in a state best described by the phrase “There appears to have been a struggle.” It’s littered with tools and old parts for equipment in and out of use. Some of those parts can’t be replaced because they haven’t been manufactured in over a decade. Bensen revels in making equipment run long past its intended lifespan, even collecting dilution refrigerators that other institutions decide are too old to maintain. He said that tidying up the office would force him to get rid of things that may still be of use, and, in any case, it’s an organized kind of chaos.

“I had a professor come in to look for a vacuum flange,” Bensen recalled, “and I just kind of reach down and ask, ‘How many do you need?’ And he says, ‘How did you know where they were?’ And it’s because that’s where they were 10 years ago. Why would they move?”

Even more than making things work and reviving old equipment, Bensen derives joy from watching students learn and grow. In a sense, his original wish to become a teacher has come true. Whenever a graduate student asks for help with an issue, Bensen approaches it as a chance to figure something out together, teaching the students not only the ins and outs of the apparatus, but also how to diagnose the problem and figure things out for themselves.

“I’m kind of boring,” Bensen repeated. “I just really like working with the students. Working with them and helping them and seeing them get it. When their stuff works again and they can start collecting data, my life is good.”

Even after graduating and leaving QMC, many students still reach out to Bensen for help.

“I'm like a resource,” he said. “‘Where'd you get this, where'd you get that, where'd you find these parts?’ Just because you leave doesn't mean you're gone. And I'm always here.”

Deitemyer and some of the other students who nominated Bensen for the Dean’s Outstanding Employee Award have made him promise he won’t retire until they graduate. So at least for the next few years, QMC can continue to count on Bensen’s boringly consistent behind-the-scenes excellence.

Written by Dina Genkina

Faculty, Staff, Student and Alumni Awards & Notes

We proudly recognize members of our community who recently garnered major honors, began new positions and more.

Faculty and Staff 
  • Tom Antonsen received the 2022 IEEE Marie Sklodowska-Curie Award.
  • Doug Bensen received the Dean’s Outstanding Employee Award.
  • Alessandra Buonanno was elected to the National Academy of Sciences and the German Academy of Sciences and received the Dirac and Galileo Galilei medals.
  • Sankar Das Sarma was quoted in Quanta Magazine.
  • Professors emeriti Bob Dorfman and Ted Kirkpatrick published a new book with Henk van Beijerenan of the Institute for Theoretical Physics of the University of Utrecht. The book, published by Cambridge University Press,  summarizes major developments in kinetic theory over the past fifty years, and is dedicated to a close friend and longtime collaborator of the authors, Matthieu Ernst, emeritus professor at the University of Utrecht.
  • Bill Dorland was quoted in the IEEE Spectrum on fusion power.
  • Jim Drake described the Parker Solar Probe's findings with SpaceDaily.
  • Ted Einstein was quoted in the obituary of B. Mitchell Baker. Einstein retired in August and continues as a Research Professor.
  • Alexey Gorshkov received the Arthur S. Flemming Award
  • Mohammad Hafezi was named a Minta Martin Professor of Engineering.
  • Donna Hammer received the University System of Maryland Board of Regents Staff Award for Outstanding Service to Students in an Academic Environment.
  • Negar Heidarian Boroujeni received a nomination for the Donna B. Hamilton Teaching Award from a student who wrote, "Thank you Dr. Heidarian for teaching with passion and compassion. Your love for physics shines through."
  •  Alicia Kollár received a Faculty Early Career Development (CAREER) award from the National Science Foundation
  • Dan Lathrop spoke with Physics Today about the strains of COVID-19 isolation on scientists.
  • Rabi Mohapatra wrote a book on the neutrino.
  • Judy Myrick retired after decades of service to the department. 
  • Johnpierre Paglione and Efrain Rodriguez have recently published a new book entitled Fundamentals of Quantum Materials: A Practical Guide to Synthesis and Exploration with World Scientific Publishing.
  • Steve Rolston was appointed to a second term as department chair.
  • Raj Roy was quoted in a Science News article on random number generation.
  • Peter Shawhan was named a UMD Distinguished Scholar-Teacher.
  • QMC postdoc Rahul Sharma was featured in the Cornell Chronicle.
  • Nicole Yunger Halpern has published a book entitled Quantum Steampunk  that "...explores the field’s aesthetic, shares its whimsy, and gazes into the potential of a quantum future. The result is a blast for fans of science, science fiction, and fantasy.” She will discuss it at the physics colloquium at 4 p.m. on March 29, 2022. 
  • Daniel Gottesman joined UMD as the first Brin Family Endowed Professor in Theoretical Computer Science and will hold an affiliate appointment in Physics.
  • Xiao-Ning Zhao retired after 23 years in the department.
 Department Notes