TITLE: Reimagining complex quantum systems: Fermions to bosons and back in a consistent way
AUTHOR: Nayana Shah - Department of Physics, Washington University in St. Louis, nayana.shah.physics@gmail.com
INVITED BY: Ramón Aguado
WHEN: July, 9 - 12PM
WHERE: Salón de Actos
Abstract:
Bosonization has been widely used for tackling strongly correlated systems in low dimensions and is used as a theoretical method of choice for a large class of problems. It is also one of the few non-perturbative approaches that can be extended to study systems and devices out of equilibrium. In this talk I will critically reexamine the Bosonization- deBosonization (BdB) procedure for systems including junctions and impurities. I will subsequently present the consistent BdB framework that not only resolves the non-equilibrium transport paradox that arises in the context of a tunnel junction but also establishes a consistent way forward that is widely relevant and applicable [1-5]. For anyone interested in using bosonization it is essential that they be cognizant of the unphysical terms that can inadvertently creep in without warning and know the basis for the framework we provide to proceed systematically. In a follow-up talk my collaborator will delve into this in the context of the Kondo model and discuss our findings that put our understanding of Impurity problems as well as the consistent BdB formalism on a stronger footing.
References:
[1] A. Ljepoja, C.J. Bolech, Nayana Shah, Phys. Rev. B 110, 045108 (2024)
[2] A. Ljepoja, N. Shah, C.J. Bolech, Phys. Rev. B 110, 045109 (2024)
[3] A. Ljepoja, C.J. Bolech, N. Shah, Phys. Rev. B 110, 045110 (2024)
[4] N. Shah and C.J. Bolech, Phys. Rev. B 93, 085440 (2016)
[5] C.J. Bolech and N. Shah, Phys. Rev. B 93, 085441 (2016)
Biography:
Nayana Shah, a research scientist at Washington University in St. Louis, is a theoretical physicist with a research focus on strongly correlated quantum matter systems and devices. An alumna of IIT Mumbai, she completed her PhD from Rutgers University and did postdoctoral research at Paul Scherrer Institute & ETH Zurich, University of Cologne, and University of Illinois at Urbana Champaign. She is a co-founder of cinciNNI (Cincinnati Near Neighbor Interactions), a tri-state (OH, KY, IN) Condensed Matter Theory forum and the founder of Women in Physics and Beyond. She is also active in the environmental and regenerative movement and is appointed on several boards including the Environmental Advisory Board of the city.
