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Faculty of Science

Department of Physics & Astronomy

Charge and energy transport at the nanoscale: Lessons from elementary models

Description

Title: Charge and energy transport at the nanoscale: Lessons from elementary models


Speaker: Dr. Dvira Segal


Institute: University of Toronto


Location: ABB 102




Description:


Quantum systems are never truly isolated from their surroundings, and this openness allows for phase decoherence and particle and energy exchange processes in the quantum system. I will discuss our efforts in simulating different families of nonequilibrium many
body quantum impurity models, relevant for describing charge and energy transport phenomena in molecules and at the nanoscale. I will focus on our recent studies of phonon-assisted electron transport in nanojunctions. Working with a minimal model, we develop a range of techniques (numerically exact, perturbative, phenomenological) to probe fundamental and practical questions concerning charge transport characteristics, current noise, fluctuation symmetries, and means for improving the thermoelectric energy conversion efficiency. Delightfully, the generic inelastic transport model can be recast to describe engineered hybrid light-matter devices. This correspondence allows us to suggest strategies for enhancing photon gain - by tuning the electronic gain medium to counteract photon loss. Beyond toy models, our
techniques can be scaled up to simulate intermediate
coherent-incoherent electrical conduction in organic polymers and DNA molecules.

McMaster University - Faculty of Science

Mailing Address

Department of Physics & Astronomy,
McMaster University

ABB-241
1280 Main Street West
Hamilton, Ontario, Canada
L8S 4M1

Contact Information

Telephone Inquiries:
+1 (905) 525-9140 ext.24559
Fax:
(905) 546-1252
Email Inquiries:
physics@mcmaster.ca

McMaster University - Faculty of Science

Mailing Address

Department of Physics & Astronomy,
McMaster University

ABB-241
1280 Main Street West
Hamilton, Ontario, Canada
L8S 4M1

Contact Information

Telephone Inquiries:
+1 (905) 525-9140 ext.24558
Fax:
(905) 546-1252
Email Inquiries:
physics@mcmaster.ca