Tag Archive for Kottos

Ramezani Ph.D. ’13 Wins Biruni Graduate Student Research Award

Tsampikos Kottos and Hamidreza Ramezani Ph.D. ’13.

Tsampikos Kottos and Hamidreza Ramezani Ph.D. ’13.

Hamidreza (Hamid) Ramezani Ph.D. ’13, recently won the Biruni Graduate Student Research Award. The award aims to promote and recognize outstanding research by a physics graduate student of Iranian heritage who is currently studying in one of the institutions of higher education in the United States, seeking originality, thoroughness, a teamwork spirit and ownership among the candidates. The honor comes with a cash award.

Before graduating with his Ph.D. from Wesleyan in November, Ramezani studied cosmology and gravitational physics while earning his master’s degree at the University of Tehran. He completed his bachelor study in solid state physics at Sahed University.

At Wesleyan, his mentor was Tsampikos Kottos, Douglas J. and Midge Bowen Bennet Associate Professor of Physics. Ramezani worked in the Wave Transport in Complex Systems lab and studied ways a macroscopic object is miniaturized. The lab’s objective is “to close the gap between the microscopic and macroscopic worlds and to develop models and theories that will help understand the interplay between quantum mechanics, interactions, and disorder, which dictate the dynamics on the mesoscopic scale.” More information on the lab and its research can be found on this website. Ramezani focused more specifically on the fundamental properties and application of complex optical systems with judicious balanced gain and loss.

Currently, Ramezani is a postdoctoral research assistant under Professor Xiang Zhang at the University of California – Berkeley. His interests are asymmetric transport phenomena in complex electronics, acoustics and photonics systems.

Kottos, Rushdy, Scowcroft Appointed Endowed Professorships

Three Wesleyan faculty members received endowed professorships for the 2013-14 academic year.

Tsampikos Kottos, associate professor of physics, is being honored with the Douglas J. and Midge Bowen Bennet Chair. The Bennet Chair, endowed in 2007, is awarded for a five-year term to “a newly tenured associate professor exhibiting exceptional achievement and evidence of future promise.”

Ashraf Rushdy, professor of English, professor of African-American studies, is being awarded the Benjamin L. Waite Professorship in English Language, first appointed in 1911.

Philip Scowcroft, professor of mathematics, is receiving the Edward Burr Van Vleck Professorship in Mathematics. The Van Vleck chair was created in 1982.

“Please join me congratulating Tsampikos, Ashraf, and Philip in recognition of their impressive intellectual achievements and institutional contributions,” said Rob Rosenthal, provost and vice president for academic affairs.

Tsampikos Kottos

Tsampikos Kottos

Tsampikos Kottos arrived at Wesleyan in 2005, having earned his B.Sc., M.Sc. and Ph.D., all in Physics, from the University of Crete, in Greece. Tsampikos develops models and theories of mesoscopic systems, those systems that are too small to be part of the macroscopic world and are described by the laws of quantum mechanics. His work, which is at the forefront of his field, has implications for designing and building nano-devices, quantum dots and atomic traps. Kottos has been recognized for his efforts with a number of grants from the National Science Foundation, the Air Force and the German National Science Foundation. In 2007, he was a visiting fellow at the Newton Institute in Cambridge, U.K. and was awarded the International Pnevmatikos Award, given biannually to an outstanding researcher in nonlinear phenomena. He is a prolific scientist and has published 45 peer-reviewed papers since coming to Wesleyan. Last year, he published a paper, resulting from a collaborative effort with Fred Ellis, highlighted by the editors of Physics Review A as exceptional research.

Kottos’s Research Presented to U.S. Air Force

Tsampikos Kottos

Research on PT-symmetric optics by Tsampikos Kottos, associate professor of physics, was mentioned at the 2012 Spring Review of the Air Force Office of Scientific Research.

In this meeting, program directors from AFOSR Scientific Directorates presented briefings that highlighted basic research programs beneficial to the U.S. Air Force. The review took place March 5-9.

Kottos’s work appears on page 26 of this presentation.

Physics Faculty, Students Published in Physical Review

A paper written by two faculty members and three undergraduates was published in the American Physical Society’s Physical Review A, Volume 84, on Oct. 13.  Their paper was one of six highlighted in the publication’s Physics Focus and This Week in Physics. The paper is titled “Experimental study of active LRC circuits with PT symmetries.”

The authors include Tsampikos Kottos, associate professor of physics; Fred Ellis, professor of physics, Joseph Schindler ’12, Ang Li ’13 and Mei Zheng ’10.

The abstract of the paper is online here.

NSF Supports Kottos’s Optics Research

Tsampikos Kottos, associate professor of physics, received a grant worth $140,121 from the National Science Foundation on Sept. 1. The grant will support a project titled “IDR:Novel Photonic Materials and Devices based on Non-Hermitian Optics” through August 2014. Kottos is collaborating with faculty from Southern Methodist University, University of Central Florida, University of Arkansas and Yale University.

Tenure and Faculty Promotions Announced

Wesleyan is pleased to announce that during its most recent review, the Board awarded tenure to four faculty effective July 1, 2011.

Ulrich Plass

Ulrich Plass, associate professor of German studies, joined the Wesleyan faculty in 2004 as assistant professor. Plass is a specialist in German literature, literary criticism, and critical theory, with a particular focus on the works of the German philosopher Theodor Adorno. He conducted his undergraduate studies at the University of Hamburg, Germany; his M.A. is from the University of Michigan,

Air Force Funds Kottos’s Microresonator Study

Tsampikos Kottos, assistant professor of physics, received a grant worth $116,634 from the Department of the Air Force for a study titled “Ab initio approach to nonlinear dynamics of collective excitations in networks of coupled optical Microresonators.” The grant will be applied through July 2013. The grant is shared with CUNY College.

West ’11, Kottos Published in Physical Review Letters

Carl West ’11, Tsampikos Kottos, assistant professor of physics, and Tomas Prosen of the University of Ljubljana in Slovenia, are the co-authors of an article titled “PT-Symmetric Wave Chaos,” published in Physical Review Letters 104 in 2010.

“This work studied the universal properties of this crossover and demonstrated that a simple scaling function could embody the effects of such dramatically different changes as increasing the system size, varying the initial energy, or having varying degrees of imperfections / disorder in the system,” West explains. “While these results were obtained from a toy model, they carry direct applications to optics where the balanced use of gain and loss has become a booming field over the past years, yet general questions of the effects of disorder or system size scaling were as of yet unknown.”

Kottos Group Co-Authors Paper on Fidelity in Quasi Systems

Tsampikos Kottos, assistant professor of physics; Joshua Bodyfelt Ph.D ’09; and Mei Zheng ’10 are the co-authors of the paper “Fidelity in Quasi-1D Systems as a Probe for Anderson Localization,” published in Acta Physica Polonica A, Proceedings of the 4th Workshop on Quantum Chaos and Localisation Phenomena, Warsaw, in 2009. They wrote the paper with Ulrich Kuhl, and Hans-Jürgen Stöckmann, who are collaborators from the University of Marburg.

This publication is part of the conference proceedings for a workshop at the Polish Academy of Sciences in Warsaw where Kottos presented this past summer. The combined theoretical and experimental work done in this project put forward a method for which the celebrated phenomenon of Anderson Localization could be detected through a measure known as Fidelity, which is typically thought of as probing the stability of a system against external perturbations. This work will constitute a large part of Zheng’s senior physics thesis.

Kottos, Ng ’08 Authors of Paper on Ultra-Cold Atoms

Tsampikos Kottos, assistant professor of physics, and physics and mathematics major Gim Seng Ng ’08 are co-authors of “Avalanches of Bose-Einstein condensates in leaking optical lattices,” published in New Journal of Physics, 11, 073045 in 2009. The paper is about novel properties of Bose-Einstein condensates (ultra-cold atoms) in open systems. This project constituted a large part of Ng’s senior honors thesis in physics.

Kottos Authors Article on Quantum Mechanical Systems

Tsampikos Kottos, assistant professor of physics, is the co-author of “Exponentially Fragile PT-Symmetry in lattices with Localized Eigenmodes,” published in Physical Review Letters 103,030,402 in 2009. The paper discusses the effects of disorder on a previously excluded class of quantum mechanical systems.