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Colloquium

Superconducting Conductors for the Next 10 Years

Prof. David  Larbalestier

by: Prof. David Larbalestier

Date: Tuesday March 03, 2015

Time: 3:00 pm – 4:00 pm

Location: Houston Science Center – Building 593 — Room 102

Overview

Superconducting Conductors for the Next 10 Years

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Colloquium

Whither Quantum Computing?

by: Dr. Barry Sanders

Date: Thursday April 12, 2012

Time: 4:00 pm – 5:00 pm

Location: Houston Science Center – Building 593 — Room 102

Overview

A working quantum computer would be revolutionary because certain problems, such as simulating quantum materials or factorization, are easily solved on a quantum computer and probably forever hard on non-quantum computers no matter how small or how fast. Quantum computing technology is at an early stage so we do not yet know which medium is best. I discuss the principles of quantum computing, technological efforts for its realization, and applications for when a quantum computer eventually works.

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Colloquium

Mike Gorman's Flame

Prof. Norm  Frankel

by: Prof. Norm Frankel

Date: Tuesday March 01, 2011

Time: 4:00 pm – 12:00 am

Location: Science & Research Building 1 – Building 550 — Room 634

Overview

Two of Mike's forte were the physics of flames and nonlinear dynamics of fluids inclusive of turbulence. This talk, to honor Mike, will be half on the former and half on the latter. It will be a "light" presentation within physics and personal realms.

Colloquium

String Theory and D-brane charge

by: Dr. Wilberth Herrera

Date: Tuesday March 01, 2011

Time: 10:00 am – 12:00 am

Location: Houston Science Center – Building 593 — Room 102

Overview

In the late 60's and early 70's , when String Theory was proposed, it was intended to explain the gravitational force at the quantum level, ie. a theory of quantum gravity. Initially String Theory included only strings as its basic mathematical objects. Today, in its modern incarnation, String Theory includes a number of different and exotic objects. One important example are D-branes, which are relevant when one wants to talk about string dynamics and interactions. One of the properties of D-branes is their charge, analogous to the electrical charge of the electron. In this talk we will discuss the mathematical framework to "measure" this charge and some consequences of this property.

Colloquium

Meso-Scale Correlated Electron Tunneling: Quantum Decay of the "False Vacuum" in the Laboratory

Prof. John H. Miller

by: Prof. John H. Miller

Date: Tuesday February 22, 2011

Time: 4:00 pm – 12:00 am

Location: Science & Research Building 1 – Building 550 — Room 634

Overview

This talk will outline new developments on time-correlated tunneling of electrons condensed into soliton domain walls in charge and spin density waves. The model treats the density wave as a quantum fluid in which condensed electrons coherently flow through a pinning barrier as soliton pairs nucleate via quantum decay of the "false vacuum." Experiments showing evidence for collective quantum tunneling up to 215 K, and the dual process of quantum nucleation of superconducting Josephson vortices, will be discussed. Finally, the talk will discuss broader implications, including bubble nucleation of universes and a proposed "theta = pi" instability for spontaneous CP violation formally similar to the "theta = pi" threshold field for soliton pair nucleation in density waves. Dr.

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