Talks

12781 - 12792 of 20114 Results

Effective field theory approach to quasi-single field inflation

Masahide Yamaguchi Tokyo Institute of Technology

March 12, 2013

PIRSA:13030096

Astrophysics
Efficient Distributed Quantum Computing

Oliver Gray University of Bristol

March 11, 2013

PIRSA:13030104

Quantum Physics
This is What a Scientist Looks Like

Sampa Bhadra York University

Natalia Toro Stanford University

Shohini Ghose Wilfrid Laurier University

March 08, 2013

PIRSA:13030086
One-photon and two-photon switching in graphene and optical nanomaterials

Mahi Singh Western University

March 08, 2013

PIRSA:13030094

Condensed Matter
The Effects of Limited Resources and Opportunities on Women’s Careers in Physics: Results from the Global Survey of Physicists

Rachel Ivie American Institute of Physics

March 08, 2013

PIRSA:13030082
Is the electron round?

Edward Hinds Imperial College London

March 08, 2013

PIRSA:13030100

High Energy Physics
12/13 PSI - Cosmology Review Lecture 14

Latham Boyle University of Edinburgh

March 08, 2013

PIRSA:13030045

Astrophysics
Making Physics Work: A Glimpse Behind the Scenes/Science

Rachel Ivie American Institute of Physics

John Berlinsky McMaster University

March 08, 2013

PIRSA:13030083
Creating Great Scientific Workplaces for Men and Women: From Practice to Theory and Back Again

Carla Fehr University of Waterloo

March 08, 2013

PIRSA:13030085
12/13 PSI - Quantum Information Review Lecture 14

Andrew Childs University of Waterloo

March 08, 2013

PIRSA:13030053

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 14

Itay Yavin McMaster University

Natalia Toro Stanford University

March 08, 2013

PIRSA:13030037

High Energy Physics
Q&A

Adriana Ocampo National Aeronautics and Space Administration

March 08, 2013

PIRSA:13030084

Effective field theory approach to quasi-single field inflation

Masahide Yamaguchi Tokyo Institute of Technology

March 12, 2013

PIRSA:13030096

Astrophysics

We apply the effective field theory approach to quasi-single field inflation, which contains an additional scalar field with Hubble scale mass other than inflaton. Based on the time-dependent spatial diffeomorphism, which is not broken by the time-dependent background evolution, the most generic action of quasi-single field inflation is constructed up to third order fluctuations. Using the obtained action, the effects of the additional massive scalar field on the primordial curvature perturbations are discussed. In particular, we calculate the power spectrum and discuss the momentum-dependence of three point functions in the squeezed limit for general settings of quasi-single field inflation. Our framework can be also applied to inflation models with heavy particles. We make a qualitative discussion on the effects of heavy particles during inflation and that of sharp turning trajectory in our framework.
Efficient Distributed Quantum Computing

Oliver Gray University of Bristol

March 11, 2013

PIRSA:13030104

Quantum Physics

I will explain how to simulate arbitrary quantum circuits on a distributed quantum computer (DQC), in which the pairs of qubits that are allowed to interact are restricted to the edges of some (connected) graph G. Even for graphs with only a modest number of long-range qubit interactions, such as the hypercube, this simulation is, in fact, efficient. Furthermore, for all graphs, the emulation scheme is very close to being optimal.
Secondly I will present an efficient quantum algorithm for parallel unrestricted memory look-up. As an application, I will show that the space-time trade off for Element Distinctness and Collision Finding can be improved.
Both results arise from applying the ideas of reversible sorting networks to quantum computing.
http://arxiv.org/abs/1207.2307
This is What a Scientist Looks Like

Sampa Bhadra York University

Natalia Toro Stanford University

Shohini Ghose Wilfrid Laurier University

March 08, 2013

PIRSA:13030086
One-photon and two-photon switching in graphene and optical nanomaterials

Mahi Singh Western University

March 08, 2013

PIRSA:13030094

Condensed Matter

In this talk we will discuss both the one-photon and two-photon switching mechanisms in hybrid nanomaterials made from two or more semiconductor, metallic and optical nanostructures. The most prominent examples of these nanostructures are graphene, semiconductor quantum dots, metallic nanoparticles, and photonic and polaritonic crystals. Advances in nanoscience have allowed for the construction of these new classes of hybrid nanomaterials. Optical excitations in semiconductor nanostructures are electron-hole pairs (excitons) whereas excitations in metallic nanostructures are surface plasmons which are collective oscillations of electrons. Therefore, the combination of these systems can provide attractive opportunities to modify, design and control optical properties and to observe new phenomena which are based on exciton-plasmon interactions. It is expected that this research will provide a theoretical road map for the development of optical sensing and optical switching.
The Effects of Limited Resources and Opportunities on Women’s Careers in Physics: Results from the Global Survey of Physicists

Rachel Ivie American Institute of Physics

March 08, 2013

PIRSA:13030082

The results of the Global Survey of Physicists draw attention to the need to focus on factors other than representation when discussing the situation of women in physics. Previous studies of women in physics have mostly focused on the lack of women in the field. This study goes beyond the obvious shortage of women and shows that there are much deeper issues. For the first time, a multinational study was conducted with 15000 respondents from 130 countries, showing that problems for women in physics transcend national borders. Across all countries, women have fewer resources and opportunities and are more affected by cultural expectations concerning child care. We show that limited resources and opportunities hurt career progress, and because women have fewer opportunities and resources, their careers progress more slowly. We also show the disproportionate effects of children on women physicists' careers. Cultural expectations about home and family are difficult to change. However, for women to have successful outcomes and advance in physics, they must have equal access to resources and opportunities. An article based on these findings can be found at: http://www.physicstoday.org/resource/1/phtoad/v65/i2/p47_s1
Is the electron round?

Edward Hinds Imperial College London

March 08, 2013

PIRSA:13030100

High Energy Physics

We have made a new measurement of the electron’s electric dipole moment (EDM) using a beam of YbF molecules. By measuring atto-eV energy shifts in a molecule, this experiment probes new physics at the tera-eV energy scale. According to the standard model, this EDM is d_e=10^(-38) e.cm – some eleven orders of magnitude below the current experimental limit. However, most extensions to the standard model predict much larger values, potentially accessible to measurement . Hence, the search for the electron EDM is a search for physics beyond the standard model. I will describe our experimental method, our current results and their implications for particle physics. I will also outline the prospects for further major improvement in sensitivity.
12/13 PSI - Cosmology Review Lecture 14

Latham Boyle University of Edinburgh

March 08, 2013

PIRSA:13030045

Astrophysics
Making Physics Work: A Glimpse Behind the Scenes/Science

Rachel Ivie American Institute of Physics

John Berlinsky McMaster University

March 08, 2013

PIRSA:13030083
Creating Great Scientific Workplaces for Men and Women: From Practice to Theory and Back Again

Carla Fehr University of Waterloo

March 08, 2013

PIRSA:13030085

In this presentation Dr Fehr will discuss the results of ISU ADVANCE, a $3.3 million National Science Foundation supported research project designed to test strategies for improving the recruitment, retention, and advancement of women and members of underrepresented minority groups in science, technology, engineering and mathematics. In particular, this talk will address barriers to, and strategies for, improving the work climate in scientific communities. These improvements benefit both men and women scientists and support research excellence.
12/13 PSI - Quantum Information Review Lecture 14

Andrew Childs University of Waterloo

March 08, 2013

PIRSA:13030053

Quantum Physics
12/13 PSI - Beyond the Standard Model Lecture 14

Itay Yavin McMaster University

Natalia Toro Stanford University

March 08, 2013

PIRSA:13030037

High Energy Physics
Q&A

Adriana Ocampo National Aeronautics and Space Administration

March 08, 2013

PIRSA:13030084

Title	Date	Collection	Type	Info
Effective field theory approach to quasi-single field inflation	2013‑03‑12	Cosmology and Gravitation	Scientific Series	View details
Efficient Distributed Quantum Computing	2013‑03‑11	Perimeter Institute Quantum Discussions	Scientific Series	View details
This is What a Scientist Looks Like	2013‑03‑08	International Women's Day 2013	Conference	View details
One-photon and two-photon switching in graphene and optical nanomaterials	2013‑03‑08	Quantum Matter	Scientific Series	View details
The Effects of Limited Resources and Opportunities on Women’s Careers in Physics: Results from the Global Survey of Physicists	2013‑03‑08	International Women's Day 2013	Conference	View details
Is the electron round?	2013‑03‑08	Particle Physics	Scientific Series	View details
12/13 PSI - Cosmology Review Lecture 14	2013‑03‑08	12/13 PSI - Cosmology Review	Course	View details
Making Physics Work: A Glimpse Behind the Scenes/Science	2013‑03‑08	International Women's Day 2013	Conference	View details
Creating Great Scientific Workplaces for Men and Women: From Practice to Theory and Back Again	2013‑03‑08	International Women's Day 2013	Conference	View details
12/13 PSI - Quantum Information Review Lecture 14	2013‑03‑08	12/13 PSI - Quantum Information Review	Course	View details
12/13 PSI - Beyond the Standard Model Lecture 14	2013‑03‑08	12/13 PSI - Beyond the Standard Model	Course	View details
Q&A	2013‑03‑08	International Women's Day 2013	Conference	View details

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Format results

Effective field theory approach to quasi-single field inflation

Efficient Distributed Quantum Computing

This is What a Scientist Looks Like

One-photon and two-photon switching in graphene and optical nanomaterials

The Effects of Limited Resources and Opportunities on Women’s Careers in Physics: Results from the Global Survey of Physicists

Is the electron round?

12/13 PSI - Cosmology Review Lecture 14

Making Physics Work: A Glimpse Behind the Scenes/Science

Creating Great Scientific Workplaces for Men and Women: From Practice to Theory and Back Again

12/13 PSI - Quantum Information Review Lecture 14

12/13 PSI - Beyond the Standard Model Lecture 14

Q&A

Effective field theory approach to quasi-single field inflation

Efficient Distributed Quantum Computing

This is What a Scientist Looks Like

One-photon and two-photon switching in graphene and optical nanomaterials

The Effects of Limited Resources and Opportunities on Women’s Careers in Physics: Results from the Global Survey of Physicists

Is the electron round?

12/13 PSI - Cosmology Review Lecture 14

Making Physics Work: A Glimpse Behind the Scenes/Science

Creating Great Scientific Workplaces for Men and Women: From Practice to Theory and Back Again

12/13 PSI - Quantum Information Review Lecture 14

12/13 PSI - Beyond the Standard Model Lecture 14

Q&A