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Monday, January 17, 2011 12:30 pm - 1:30 pm EST (GMT -05:00)

Mohammad Ansari: The Kondo effect

Mohammad Ansari, Institute for Quantum Computing

Abstract

With lowering temperature, a qubit may become strongly coupled to the reservoirs. This can result into some exotic situations such as: the appearance of full conductivity instead of current blockade in a quantum dot, increasing resistivity with lowering temperature in a metal, and the appearance of microresonators in the critical current noise in a Josephson junction. In this talk, some of these phenomena are discussed.

Monday, January 31, 2011 12:30 pm - 1:00 pm EST (GMT -05:00)

Gus Gutoski: Short quantum games characterize PSPACE

Gus Gutoski, Institute for Quantum Computing

Abstract

I will present material from http://arxiv.org/abs/1011.2787. The abstract at that link is included below. Essentially, the result is a strengthening of the QIP=PSPACE result of Jain, Ji, Upadhyay, and Watrous from 2009. A goal of this talk is to clarify the statement and meaning of the multiplicative weights update method and illustrate how it can be used to prove space bounds in quantum complexity theory.