Archive for the ‘Graduate Studies News’ Category

Students from China’s Shandong University Spend a Year with Duke Physics

Tuesday, June 4th, 2013
shandong-72

l-r: Xiaojun Yao, Xiaqing Li, Yajing Huang, Xiaomeng Jia and Yuchen Zhao | Photo by Cristin Paul.

“Life here is really busy, but colorful,” says Xiaqing Li, one of five physics majors from Shandong University in China who spent the 2012-2013 academic year at Duke. The students lived on West Campus and took physics classes, electives, and did independent study research.

While the five students had five different experiences, they all agree they enjoyed choosing their own classes and schedules, being immersed in a foreign culture, and experiencing new ways of learning.

“I think it’s good to study abroad and have a different experience,” says Xiaomeng Jia. “I learned a different culture, a different kind of lifestyle, and a different way of thinking. And I introduced my way of thinking to my friends as well. It’s the best experience in my life up to now.”

This was the first year that Shandong students studied at Duke; in the fall three more students from Shandong will follow in their footsteps. In addition, two physics students from Wuhan University will spend fall term here. Wuhan University is the partner university for Duke Kunshan University (DKU), Duke’s campus in China.

“As a university, we have a strategy for making new connections to China,” says Prof. Robert Calderbank, dean of natural sciences and professor of computer science, math, and electrical and computer engineering. “Part of that strategy is making good connections with places like Shandong University that are top-tier Chinese universities. We’re really excited about this opportunity to bring some of their very best students to Duke.” (more…)

Unlocking the Diverse Dynamics of Large-Scale Networks

Thursday, May 23rd, 2013
davidrosin

Photo Credit: Joel Greenberg

Thinking of energy grids, transportation graphs, and the brain, it becomes clear that networks are ubiquitous in nature and technology. The dynamics of networks is extremely difficult to grasp and exploit technologically because of large numbers of elements involved. A new experimental paradigm could now solve this issue. Recently, visiting graduate student David Rosin, post-doctoral research associate Damien Rontani, and Prof. Daniel Gauthier in the Quantum Electron Lab have implemented on electronic chips versatile dynamic network that can be used to solve technological problems. One study (together with David’s co-advisor, Prof. Eckehard Schöll at TU Berlin) introduces a novel artificial neural network that is promising for fast bio-inspired processing because of its fast timescale, which is a million times greater than for its biological counterpart. The network displays rich synchronization patterns that originate from a novel control scheme [1]. In another study, a network with chaotic dynamics is created that generates physical random numbers at an unprecedented bitrate, thus enabling more security and speed for up-to-date cryptographic protocols [2]. These two experiments expand our fundamental understanding of complex networks and represent a significant step towards applying dynamical networks to solve cutting-edge problems in information processing.

[1] Rosin et al., Phys. Rev. Lett. 110, 104102 (2013).

[2] Rosin et al., Phys. Rev. E 87, 040902(R) (2013).

Grad Student Laskaris Published in PRL

Wednesday, May 22nd, 2013
OLYMPUS DIGITAL CAMERAGraduate student Georgios Laskaris recently published a paper in Physical Review Letter titled “First measurements of spin-dependent double-differential cross sections and the Gerasimov-Drell-Hearn integrand from  3He(g,n)pp at incident photon energies of 12.8 and 14.7 MeV” under the supervision of his advisor Prof. Haiyan Gao together with the Capture Group at TUNL, other collaborators from Duke and elsewhere, and several theory collaborators from Europe. This is the first paper in PRL on the topic of spin-dependent breakup cross sections of 3He and the Gerasimov-Drell-Hearn (GDH) sum rule integrand below pion production threshold. The GDH sum rule relates dynamic quantities as the spin-depedent photo-disintegration cross sections to the anomalous magnetic moment of a nucleon or nucleus.
The experiment took place at the HIgS facility of TUNL. A 3He target polarized using the spin-exchange optical pumping technique and a circularly polarized gamma-ray beam were employed. The neutrons coming from the three-body break up of 3He were detected using 16 liquid scintillator detectors. The results were compared with the state-of-the-arts three body calculations and clearly favor the theory which includes the Coulomb interaction. This shows that the inclusion of Coulomb repulsion in the theoretical calculations is of utmost importance for this particular process. Further, the extracted GDH integrand values establish the first steps towards the investigation of GDH sum rule below pion production threshold.

2013 Graduation Ceremony Pictures Now Online

Monday, May 20th, 2013

IMG_1694Photographs from the 2013 diploma ceremony for the Physics Department can be found online here. Use your Duke NetID and password to access them. Congratulations to Drs. Baolei Li, Abhijit Mehta, Jie Ren and Yingyi Zhang and the graduates the bachelor’s program. Thank you to Prof. Richard Palmer for sharing these pictures.

Grad Students Li and Zheng Win Chinese Government Award

Wednesday, April 17th, 2013
li_zheng

l-r: Li, Zheng

Physics graduate students Baolei Li and Huaixiu Zheng have been selected as two of the four Duke students to win the Chinese Government Award for Outstanding Self-Financed Students Abroad by China Scholarship Council (CSC). This award was founded by the Chinese government in 2003 with the purpose of rewarding the academic excellence of self-financed Chinese students studying overseas. Only those with outstanding performance in their PhD studies are considered by the award selection panel and no more than 500 talented young people are granted the award each year all over the world.

Baolei Li, who just got his degree in physics, did his Ph.D. thesis work under the supervision of Prof. Warren S. Warren, and Huaixiu Zheng is a graduate student working with Prof. Harold Baranger and will finish his degree this summer.

Here is a website (Chinese) showing all of the 489 awardees this year all over the world and here is the website listing the 25 awardees covered by Chinese Embassy in DC.

Last year, we also had two winners of this award from our department, Chenglin Cao and Wangzhi Zheng. Click here to read that story.

Grad Student Zheng Published in PRL

Tuesday, April 9th, 2013

zhengGraduate student Huaixiu Zheng recently published a paper in PRL titled “Persistent Quantum Beats and Long-Distance Entanglement from Waveguide-Mediated Interactions,” together with his advisor Prof. Harold Baranger. This is their second paper in PRL on the topic of waveguide-QED, which explores the interaction between local quantum objects—qubits—and light confined in a one-dimensional waveguide.

The key question addressed is how two distant qubits talk to each other via a common waveguide-bus. Zheng developed a novel numerical Green function method, which for the first time enables  access to the non-Markovian regime in 1D waveguide-QED systems (where one has to take into account memory effects in the waveguide). Surprisingly, even when the two qubits are far apart, they are strongly entangled and can generate strongly-correlated photons inside the waveguide. This originates from the special 1D nature of the waveguide. The long-distance entanglement demonstrated in this work makes 1D waveguide-QED systems promising candidates for scalable quantum networking.

For details, you can read the PRL article online here.

Grad Student Callan to Become Teaching Associate Professor of Physics at Colorado School of Mines

Monday, March 25th, 2013

040713_callan009Graduate student Kristine Callan recently accepted a position as a Teaching Associate Professor of Physics at Colorado School of Mines in Golden, Colorado. The Physics Department at CSM graduates about 70 Engineering Physics majors each year. The department is also active in Physics Education Research and was recently selected as one of four 2013 recipients of the “Improving Undergraduate Physics Education Award”. Kristine is looking forward to starting her new position this August.

Prof. Kruse Hosts LHC Outreach Event

Tuesday, March 19th, 2013

kruseProf. Mark Kruse, with graduate students David Bjergaard and Kevin Finelli, hosted an LHC Outreach event on March 16. It was well attended and DukeToday writer Ashley Yeager wrote an article “Local high-schoolers analyze real LHC data at Duke.” You can read it online here.

Grad Student Zhang Passes Defense

Monday, March 4th, 2013

P1130847-72Congratulations to graduate student Yingyi Zhang who passed her defense on March 1, 2013. She is pictured at left with her adviser Prof. John Thomas.

Grad Student Wongjirad Wins Block Award

Thursday, February 21st, 2013

taritree_block2-300x224Graduate student Taritree Wongjirad attended the Aspen Winter Conference “New Directions in Neutrino Physics.” Based on his poster contribution he was the winner of the Block Award, awarded to a promising young physicist.