Linke Lab's Work Cited

Research by a team that includes Assistant Professor Norbert Linke, UMD physics graduate student Nhung Hong Nguyen, and visiting graduate student Cinthia Huerta Alderete has been selected as one of the 2019 Top Picks in Computer Architecture by IEEE Micro. The work, which compared different kinds of quantum computers, was a collaboration with scientists from Princeton and IBM.linke groupCinthia Huerta Alderete, Nhung Hong Nguyen, and Norbert Linke.

IEEE Micro evaluates submissions to all computer architecture conferences that take place throughout the year and selects 12 as Top Picks for their novelty and potential for long-term impact. They invite Top Pick authors to prepare an article for the year’s special issue, which was published in May 2020.

The article contributed by Linke and his colleagues, “Architecting Noisy Intermediate-Scale Quantum Computers: A Real-System Study,” benchmarked seven different quantum computers with diverse architectures using the team’s novel cross-platform compilation tool. The quantum computers tested included superconducting qubit-based implementations from IBM and Rigetti as well as UMD’s own trapped ion quantum computer, which outperformed the other platforms in a series of standard quantum tasks.Linke Lab figure image 600x116The team compared the success rate of seven different quantum across different tasks. (Figure courtesy of the authors.)

“The fact that quantum computer architecture and benchmarking is recognized by IEEE Micro shows that this potentially revolutionary technology has reached the mainstream of computer science,” says Linke.

IEEE Micro has selected Top Picks for the last 16 years. This year, the journal received 96 submissions, with only one other quantum computing publication receiving the Top Pick honor.

Original story by Dina Genkina

Maissam Barkeshli Promoted to Associate Professor

Maissam Barkeshli has been promoted to the rank of Associate Professor, effective July 1, 2020.barkeshli maissamMaissam Barkeshli Barkeshli received his Ph.D. from the Massachusetts Institute of Technology. Afterward, he was a Simons Postdoctoral Fellow at Stanford University and a postdoctoral researcher at Microsoft's Station Q at the University of California, Santa Barbara. A theoretical condensed matter physicist interested in complex quantum many-body phenomena, Barkeshli explores the many ways that atoms and electrons—prototypical quantum particles—can combine in large numbers to produce a range of novel behaviors.  

Barkeshli is a member of the Condensed Matter Theory Center and a fellow of the Joint Quantum Institute.  While at UMD, he has won an Alfred P. Sloan Research Fellowship and a CAREER award from the National Science Foundation. He also received the Richard A. Ferrell Distinguished Faculty Fellowship from the UMD Department of Physics.


Ki-Yong Kim Promoted to Full Professor

Ki-Yong Kim has been promoted to the rank of Professor, effective July 1, 2020. Kim earned his Ph.D. at the University of Maryland and received the Marshall N. Rosenbluth Outstanding Doctoral Thesis Award from the Kim KiYong 2020Ki-Yong KimAmerican Physical Society. After a Director’s Postdoctoral Fellowship at Los Alamos National Laboratory, he joined the UMD faculty in 2008. He has received a CAREER award from the National Science Foundation, a Department of Energy Early Career Research Award and the Richard A. Ferrell Distinguished Faculty Fellowship from the UMD Department of Physics.

Kim uses ultrashort light pulses (<10-13 seconds) in a broad spectral range (from terahertz to X-rays) to excite and probe phenomena occurring at the atomic and molecular level. Applications range from medical imaging to chemistry to national security. 

Hafezi Named Simons Investigator

Associate Professor Mohammad Hafezi has been named a  2020 Simons Investigator in Physics by the New York-based Simons Foundation. Simons Investigator Awards in Mathematics, Physics, Astrophysics and Computer Science support outstanding theoretical scientists in their most productive years, Hafezi SimonsMohammad Hafeziwhen they are establishing creative new research directions, providing leadership to the field and effectively mentoring junior scientists. 

Hafezi holds appointments in the Department of Electrical and Computer Engineering and Department of Physics, is a fellow of the Joint Quantum Institute and is a member of the Institute for Research in Electronics & Applied Physics, and Quantum Technology Center. He is known for his contributions in a number of works to synthesize and characterize quantum many-body and topological physics beyond electronic systems. Examples of his contributions include cold atoms, and superconducting qubits and photons, which have helped shape the field of topological photonics. Some of his current interests include efficient characterization and probing of many-body properties in quantum simulators. His research group is currently exploring the application of quantum optics to create, probe and manipulate correlated electron systems.

Simons Investigators are appointed for an initial period of five years with the option for renewal for an additional five years, upon the evaluation of scientific impact of the Investigator. An Investigator receives research support of $100,000 per year, and an additional $10,000 per year is provided to the Investigator’s department.

Prof. Christopher Jarzynski was also named a 2020 Simons Fellow, as were Jacob Bedrossian of the Department of Mathematics and the Center for Scientific Computation and Mathematical Modeling and Professor Leonid Koralov of the Department of Mathematics.


Globally Known Physics Education Researcher Joe Redish Retires

Edward F. “Joe” Redish, a nuclear theorist who became a globally recognized expert in physics education research, retired on June 30 after 52 years in the Department of Physics.

Upon earning his Ph.D. at MIT in 1968, Redish came to UMD on a fellowship in nuclear theory. He was hired as an assistant professor in 1970, continuing his work on the theory of reactions and the quantum few-body problem.

Over the next dozen years, technological advances made computers vastly more accessible, and Redish recognized their enormous potential for students grappling with difficult concepts and calculations.  Intending to develop useful tools, he accepted the position of department chair in 1982, and quickly launched the Maryland University Project in Physics and Educational Technology (M.U.P.P.E.T.). Among the results was M.U.P.P.E.T. Utilities, a software package with applications for graphing, simple animations and data management that allowed students to use computing for complex physics problems.

M.U.P.P.E.T. inspired broad interest in incorporating computing into physics instruction. The experience also heightened Redish’s interest in physics education. In 1992, he took a sabbatical at the University of Washington with Dr. Lillian McDermott, a leader in the field, and upon his return launched the Maryland Physics Education Research Group.  

In the 25 years since its creation, the UMD PERG has graduated 23 physics Ph.Ds. and trained several postdocs. Graduates include many tenured physics faculty, two American Physical Society (APS) fellows, and a president of the American Association of Physics Teachers (AAPT).

Among the group’s notable efforts was the Maryland Physics Expectations Survey (MPEX), which revealed a chasm between what students and professors thought was happening in introductory physics courses. This paper led to the development of similar surveys in physics and in other fields. Redish and the PERG became leaders in the development of a theoretical framework for Physics Education Research and in developing analytic tools for cognitive modeling of student thinking

In 2003, as part of The Physics Suite, a project unifying multiple active-learning materials with a new textbook, Redish wrote a guide to physics teaching, Teaching Physics with the Physics Suite. A December 2019 review in the UK's Institute of Physics’ education newsletter called it "perhaps the single best book available for a teacher to read who wants to get a deeper insight into teaching and learning in physics." It has been translated into Japanese and Farsi.

In response to his research findings, Redish overhauled Physics 121/122 (required for life science students) to focus on the development of higher-order scientific thinking skills, reconsidering each component and better integrating the labs, tutorials and homework assignments. To provide a more interactive experience, he introduced interactive lecture demonstrations and clickers, which provided real-time feedback to the instructor on what students were absorbing.

In 2010, Redish received funding from the Howard Hughes Medical Institute for the National Experiment in Undergraduate Science Education (NEXUS) and created Physics 131/132. This sequence was designed for students planning careers in medicine and bioscience, who will better understand chemical and biological processes with a solid foundation in physics. It is a core element of the multi-university, multi-million dollar National Science Foundation (NSF) project, The Living Physics Portal, a national web resource for organizing, evaluating, and sharing materials for physics classes for life science students.

His more than 100 published papers include three major articles in Physics Today, two of which were cover articles.. He was awarded $7.5 million in federal funding for Physics Education Research.

Redish is a UMD Distinguished Scholar-Teacher and a Fellow of both the American Association for the Advancement of Science and the APS.  He has received a broad range of accolades, including the NSF Director's Distinguished Teaching Scholar Award in 2005.

For 12 years, he was the U.S. representative to the International Union of Pure and Applied Physics Commission on Physics Education (C14), and received its Education Medal in 2012. He was awarded the AAPT Oersted and Millikan medals and the University System of Maryland Board of Regents Award for Teaching. In 2015, he received the APS Excellence in Physics Education Award, "For leadership in the use of computers in physics education, applying cognitive research to improve student learning and critical thinking skills, tailoring physics instruction for nonphysicists, and guiding the field of physics education research through a period of significant growth."

He was a leader in helping building the Physics Education Research community, editing the first PER journal and organizing major conferences including the first on Computers in Physics Education (1988), a major international meeting on Physics Education (1996), and the first (and so far only) Fermi International Summer School on PER (2003).

Redish’s wife Ginny, daughter Deborah and son David all hold doctorates in science. In 2011, Joe and Ginny established the E.F. Redish Endowed Professorship in Science Education.  In 2019, they created the E.F. and J.C. Redish Maryland Promise Scholarship

In 2017, more than 150 colleagues and advisees gathered to honor Redish on his 75th birthday.   

In retirement, Redish plans to devote his time to writing papers, contributing materials to the Living Physics Portal, and continuing his research on student use of mathematics in physics.