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Monday, November 13, 2017 2:30 pm - 2:30 pm EST (GMT -05:00)

Shining Light on Perovskite Chalcogenides

Colloquium: Jayakanth Ravichandran - University of Southern California

Perovskite Chalcogenides are a new class of semiconductors, which have tunable band gap in the visible to infrared part of the electromagnetic spectrum. Besides this band gap tunability, they offer a unique opportunity to realize large density of states semiconductors with high carrier mobility. In this talk, I will discuss some of the advances made both in my research group and in the research community in theory, synthesis of these materials and understanding their optoelectronic properties.

Monday, October 30, 2017 2:30 pm - 2:30 pm EDT (GMT -04:00)

The NV center in diamond: a versatile quantum technology

Colloquium: Ania Jayich, University of California, Santa Barbara

The nitrogen vacancy (NV) center in diamond is an atomic-­scale defect that exhibits remarkably coherent quantum properties in a uniquely accessible way: at room temperature, in ambient conditions, and even immersed in biological environments. NV centers are being explored for a variety of quantum technologies, including quantum sensing and quantum information processing.

Wednesday, November 15, 2017 2:00 pm - 2:00 pm EST (GMT -05:00)

Quantum clocks and information driven heat engines

Seminar: Bhaskaran Muralidharan

We describe two distinct applications of quantum dots [1-3] from a quantum transport perspective. In the first part, we bring in a Bayesian viewpoint to the analysis of clocks, specifically taking the Salecker Wigner clock formulation [4] and explore a novel set up to estimate the tunneling time [1] between electrons in a contact and a quantum dot weakly coupled to it. Using the exponential tunneling distribution as priors for clocks, we analyze the case of a single precessing spin in a quantum dot.