Quantum Fluctuations and Phase Transitions

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Date/Time:Monday, 17 Nov 2014 from 4:10 pm to 5:00 pm
Location:Physics 0003
Phone:515-294-5441
Channel:College of Liberal Arts and Sciences
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Nandini Trivedi The Ohio State University

Abstract: I will discuss the role of quantum fluctuations in driving phase transitions and contrast them with the better understood thermally driven phase transitions. I will show how standard paradigms break down and novel phases of matter emerge in the context of superconductor-insulator phase transitions and discuss our predictions for experimental probes through local spectroscopies and dynamics. These concepts have overlaps with cold atoms and AdS/CFT that I will illustrate.

[1] Bouadim, Loh, Randeria and Trivedi, "Single- and two-particle energy gaps across the disorder-driven superconductor-insulator transition", Nature Physics 7, 884 (2011).

[2] Swanson, Loh, Randeria and Trivedi, "Dynamical Conductivity across the Disorder-Tuned Superconductor-Insulator Transition", Phys. Rev. X 4, 021007 (2014).

Bio: Nandini Trivedi got her undergraduate degree from the Indian Institute of Technology, Delhi and a Ph.D in Physics in 1987 from Cornell University. After post-doctoral research at University of Illinois at Urbana-Champaign and State University of New York, Stony Brook, she joined Argonne National Laboratory as a staff scientist. In 1995 she joined the faculty of the Tata Institute of Fundamental Research, Mumbai. Since 2004 she has been a professor of Physics at the Ohio State University. Her research interests include strong correlations, disorder and Monte Carlo simulations of quantum materials and ultra-cold atomic gases.