About Center for Quantum Science

Website: http://quantum.gmu.edu/

Faculty: Yuri MishinPredrag NikolicKaren SauerIndubala SatijaMing TianKrishnamurthy VemuruErhai Zhao

The Center for Quantum Science at George Mason University gathers researchers from the School of Physics, Astronomy and Computational Sciences whose interests span condensed matter, atomic, molecular and optical physics. The main purpose of the Center is to stimulate the research productivity, interaction and collaboration among its members, create a collective mentoring environment for young researchers, and popularize its research areas to students and the public.

Research at the Center is funded by the National Science Foundation, Office of Navy Research, National Institute of Standards and Technology, Department of Energy, and the Air Force Office of Scientific Research.

Specific research areas include (but are not limited to):

condensed matter physics

superconductivity, quantum magnetism, topological insulators
quantum phase transitions and critical points
quantum field theory of interacting electrons
atomistic modeling and simulation of materials

atomic, molecular and optical physics

ultra-cold atoms, superfluidity, unitarity
optical lattices, quantum simulation, artificial gauge fields
magnetic resonance for materials characterization or for substance detection
quantum magnetometers
laser atomic spectroscopy, nonlinear and quantum optics

inter-disciplinary and applied physics

rare-earth based solid state quantum memory and quantum computation
quantum transport in spintronic and nano-electronic devices
non-linear dynamics

 

The Director …

Krishna Vemuru- SPACS Colloquium October 11, 2012, 3pm

Magnetic nanostructures

Johnson Center 325

Vemuru abstract: Synthesis and characterization of magnetic nanostructures is an important aspect of research in nanoscience.  In order to improve the characteristics of nanomaterials based devices, it is important to understand the structure property relation as well as the mechanism of the magnetic ordering. In this talk, I will introduce magnetic nanostructured materials with applications in high density magnetic data storage. Some of these are rodlike metallic iron and g-Fe2O3 nanoparticles,  PZT thin films with Co nanostructures,  FeRhPd/Co thin films, core-shell structured FePt, FePtCu, and FePtAu nanoparticles. I will present the details of the nanostructural characterization using small angle neutron scattering, and the element specific magnetic moment determination using x-ray magnetic circular dichroism spectroscopy.

Brandon Anderson, Quantum over Brunch Friday, Oct. 12, 2012, 11am

Science and Technology I, Room 306, 11am (+ lunch after noon)

Brandon Anderson, JQI
TBA

Phil Rubin, Quantum over Brunch Friday, Nov. 2, 2012, 11am

Science and Technology I, Room 306, 11am (+ lunch after noon)

Phil Rubin, GMU
TBA

James Murray, Quantum over Brunch Friday, Nov. 16, 2012, 11am

Science and Technology I, Room 306, 11am (+ lunch after noon)

James Murray, Johns Hopkins University
TBA

So Takei, Quantum over Brunch Friday, Nov. 30, 2012, 11am

Science and Technology I, Room 306, 11am (+ lunch after noon)

Superconducting proximity effect: from transport and fluctuations to topological superconductivity”
So Takei, University of Maryland

The study of hybrid structures involving superconducting and non-superconducting materials has recently enjoyed a renewed level of activity. On the one hand, focus is on the physics of superconductor-ferromagnet junctions due to the recent emergence of experiments showing intriguing and unexpected transport behavior through such structures. On another front, the most recent excitement in the field originates from the fact that a rather conventional example of these hybrid systems can harbor long-sought exotic emergent particles known as Majorana fermions. In line with these activities, I will present two connected topics. The first part is motivated by a recent experiment [1] that observed a highly unusual transport behavior of ferromagnetic Cobalt nanowires proximity-coupled to superconducting electrodes. I propose an explanation for both the anomalously-strong proximity effect and the mysterious resistance peak that preempts the superconducting transition in this experiment [2]. In the second part, I theoretically address the origin of the mysterious “soft gap” measured in the tunneling conductance of the proximity-induced superconductivity in a semiconductor-superconductor hybrid structure, where the observed zero-bias conductance peak [3] has created …

Victor Vakaryu, Quantum over Brunch Friday, Nov. 9, 2012, 11am

Science and Technology I, Room 306, 11am (+ lunch after noon)

Victor Vakaryuk, Johns Hopkins University
TBA