Investigation of Coating Effects on Synthetic and Biological Ferrihydrite
Tuesday, May 14, 2013
A lecture by Thelma Berquo Candidate for the position in Physics
I will report on the investigation of interactions of the antiferromagnetic iron oxide ferrihydrite by comparing magnetic properties of synthetic uncoated and coated nanoparticles. Four different coating agents (sugar, alginate, lactate and ascorbate) were employed to prepare sub-samples from the same batch of ferrihydrite, and both magnetic and non-magnetic techniques were used to characterize the samples. I will present results showing that coating agent caused a dramatic change in the magnetic properties of these nanoparticles. In addition, I will show how the results obtained from studying synthetic ferrihydrite can help us to better understand the magnetic properties of Fe microbial mat deposited on hydrothermal vents at Loihi Seamount (Hawaii).
RKC 115 Sponsored by: Division of Science, Mathematics, and Computing.
Transmon-phonon Coupling of Plasma Oscillations and Lattice Vibrations
Wednesday, May 15, 2013
A lecture by Andrew Skinner Candidate for the position in Physics
In the transmon quantum bit, or qubit, current oscillates back and forth between two superconducting islands separated by a Josephson tunnel junction. One expects from conservation of momentum and energy that the switching of the current would cause the substrate to vibrate. These quantized lattice vibrations are known as phonons. For a representative model transmon we derive the phonon emission pattern and numerically integrate the device's corresponding decoherence and relaxation rates. RKC 111 Sponsored by: Division of Science, Mathematics, and Computing.
Students presenting: Adenike Akapo, Raed, Al-Abbasee Ammar Al-Rubaiay, Perry Anderson, Michael Anzuoni, Jeremy Arnstein, Nina Bar-Giora, Ian Barnett, Brendan Beecher, Abhinanda Bhattarcharyya, Cara Black, Sheneil Black, Laura Bradford, Cameron Brenner, Ross Cameron, Emily Carlson, Matteo Chierchia, Diana Crow, Kierstin Daviau, Jonathan De Wolf, Ha Phuong Do Thi, Katharine Dooley, Alexia Downs, Kimara DuCasse, Amy Eisenmenger, Jose Falla, Margo Finn, Joseph Foy, Prabarna Ganguly, Nabil Hossain, Matthew Hughes, Linda Ibojie, Miles Ingram, Lena James, Blagoy Kaloferov, Sun Bin Kim, Thant Ko Ko, Ruth Lakew, Hsiao-Fang Lin, Sam Link, Amy List, Weiying Liu, Julia Lunsford, Iliana Maifeld-Carucci, Claire Martin, Andres Medina, Jose Mendez, Tiago Moura, Jonathan Naito, Anam Nasim, Rachit Neupane, Mark Neznansky, Jeffrey Pereira, Liana Perry, Anisha Ramnani, Lydia Rebehn, Nolan Reece, Jonah Richard, Loralee Ryan, Perry Scheetz, Joy Sebesta, Erin Smith, Will Smith, Frank Stortini, James Sunderland, Oliver Switzer, Jacqueline Villiers, Weiqing Wang, Jasper Weinrich-Burd, Michael Weinstein, Layla Wolfgang, Fanya Wyrick-Flax, Sara Yilmaz, Anis Zaman, Wancong Zhang, Feifan Zheng
Reem-Kayden Center Sponsored by: Division of Science, Mathematics, and Computing.