Conference

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Recent developments in asymptotic safety: tests and properties

Tim Morris University of Southampton

April 22, 2014

PIRSA:14040085
Playing with a Bouncing Universe

Neil Turok University of Edinburgh

April 04, 2014

PIRSA:14040128
TBA

Nima Arkani-Hamed Institute for Advanced Study (IAS)

April 04, 2014

PIRSA:14040127
Gravity waves, large-field inflation, and string theory

Eva Silverstein Stanford University

April 04, 2014

PIRSA:14040126
Early Universe phenomenology after BICEP

Matias Zaldarriaga Institute for Advanced Study (IAS) - School of Natural Sciences (SNS)

April 04, 2014

PIRSA:14040125
The Importance of Being Curved

Matthew Kleban New York University (NYU)

April 04, 2014

PIRSA:14040124
B modes for galaxy surveys

Marc Kamionkowski Johns Hopkins University - Department of Physics & Astronomy

April 04, 2014

PIRSA:14040123
Prospects for Future Measurements
- Douglas Scott University of British Columbia
- Mark Halpern University of British Columbia
- Barth Netterfield University of Toronto
- Rachel Bean Cornell University
- Matt Dobbs McGill University
April 04, 2014

PIRSA:14040122
Results from BICEP 2

Christopher Sheehy University of Chicago - Department of Physics

April 04, 2014

PIRSA:14040131
Overview

Kendrick Smith Perimeter Institute for Theoretical Physics

April 04, 2014

PIRSA:14040121
Many-body localization with dipoles

Chris Laumann Boston University

February 14, 2014

PIRSA:14020129
Low Spin State Mott Insulators and Emergence of novel Quantum Spin Liquids

Baskaran Ganapathy Institute of Mathematical Sciences

February 14, 2014

PIRSA:14020128

Recent developments in asymptotic safety: tests and properties

Tim Morris University of Southampton

April 22, 2014

PIRSA:14040085

The talk will review recent tests of the asymptotic safety conjecture within functional renormalisation group studies and progress in understanding the properties that such a fixed point would have.
Playing with a Bouncing Universe

Neil Turok University of Edinburgh

April 04, 2014

PIRSA:14040128
TBA

Nima Arkani-Hamed Institute for Advanced Study (IAS)

April 04, 2014

PIRSA:14040127
Gravity waves, large-field inflation, and string theory

Eva Silverstein Stanford University

April 04, 2014

PIRSA:14040126
Early Universe phenomenology after BICEP

Matias Zaldarriaga Institute for Advanced Study (IAS) - School of Natural Sciences (SNS)

April 04, 2014

PIRSA:14040125
The Importance of Being Curved

Matthew Kleban New York University (NYU)

April 04, 2014

PIRSA:14040124
B modes for galaxy surveys

Marc Kamionkowski Johns Hopkins University - Department of Physics & Astronomy

April 04, 2014

PIRSA:14040123
Prospects for Future Measurements
- Douglas Scott University of British Columbia
- Mark Halpern University of British Columbia
- Barth Netterfield University of Toronto
- Rachel Bean Cornell University
- Matt Dobbs McGill University
April 04, 2014

PIRSA:14040122
Results from BICEP 2

Christopher Sheehy University of Chicago - Department of Physics

April 04, 2014

PIRSA:14040131
Overview

Kendrick Smith Perimeter Institute for Theoretical Physics

April 04, 2014

PIRSA:14040121
Many-body localization with dipoles

Chris Laumann Boston University

February 14, 2014

PIRSA:14020129

Statistical mechanics is the framework that connects thermodynamics to the microscopic world. It hinges on the assumption of equilibration; when equilibration fails, so does much of our understanding. In isolated quantum systems, this breakdown is captured by the phenomenon known as many-body localization. This breakdown manifests in a variety of ways, as elucidated by much recent theoretical and numerical work. Many-body localized phases violate Ohm's law and Fourier's law as they conduct neither charge nor heat; they can exhibit symmetry breaking and/or topological orders in dimensions normally forbidden by Mermin-Wagner arguments; they hold potential as strongly interacting quantum computers due to the slow decay of local coherence.
In this talk, I will briefly introduce the basic phenomena of many-body localization and review its theoretical status. To date, none of these phenomena has been observed in an experimental system, in part because of the isolation required to avoid thermalization. I will consider several dipolar systems which we believe to be ideal platforms for the realization of MBL phases and for investigating the associated delocalization phase transition. The presence of strong interactions in these systems underlies their potential for exploring physics beyond that of single particle Anderson localization. However, the power law of the dipolar interaction immediately raises the question: can localization in real space persist in the presence of such long-range interactions?
I will review and extend several arguments producing criteria for localization in the presence of power laws and present small-scale numerics regarding the MBL transition in several of the proposed dipolar systems.
Associated preprint:
N. Yao, CRL, S. Gopalakrishnan, M. Knap, M. Mueller, E. Demler., M. Lukin arXiv:1311.7151
Low Spin State Mott Insulators and Emergence of novel Quantum Spin Liquids

Baskaran Ganapathy Institute of Mathematical Sciences

February 14, 2014

PIRSA:14020128

In a conventional Mott insulator, magnitude of local spin moments remain fixed. They are `fixed spin Mott insulators'. We suggest that, in a multi orbital Hubbard model, when local Hund coupling is won over by inter-orbital superexchange couplings between neighboring sites, local spin moment can decrease its value in a cooperative fashion, through a first order phase transition, These are `Low spin state Mott insulators' (LSSMI). The minimal value of spins that can be reached are zero (half), for even (odd) number of electrons per site, We show that in LSSMI, depending on orbital degeneracy and electron number per site, novel quantum spin liquids can emerge, We discuss systems such as Fe arsenide, Fe selenide family and La2CoO3 in the light of our proposal. Certain long standing puzzles, including absence of any magnetic phase transition in La2CoO3 is explained in terms of a novel quantum spin liquid. Some properties of this spin liquid, a liquid of `quantum strings' will be discussed and some predictions made.

Title	Speaker(s)	Date	Talk Type	Info link
Recent developments in asymptotic safety: tests and properties	Tim Morris	2014-04-22	Conference	View details
Playing with a Bouncing Universe	Neil Turok	2014-04-04	Conference	View details
TBA	Nima Arkani-Hamed	2014-04-04	Conference	View details
Gravity waves, large-field inflation, and string theory	Eva Silverstein	2014-04-04	Conference	View details
Early Universe phenomenology after BICEP	Matias Zaldarriaga	2014-04-04	Conference	View details
The Importance of Being Curved	Matthew Kleban	2014-04-04	Conference	View details
B modes for galaxy surveys	Marc Kamionkowski	2014-04-04	Conference	View details
Prospects for Future Measurements	Douglas Scott, Mark Halpern, Barth Netterfield, Rachel Bean, Matt Dobbs	2014-04-04	Conference	View details
Results from BICEP 2	Christopher Sheehy	2014-04-04	Conference	View details
Overview	Kendrick Smith	2014-04-04	Conference	View details
Many-body localization with dipoles	Chris Laumann	2014-02-14	Conference	View details
Low Spin State Mott Insulators and Emergence of novel Quantum Spin Liquids	Baskaran Ganapathy	2014-02-14	Conference	View details

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Format results

Recent developments in asymptotic safety: tests and properties

Playing with a Bouncing Universe

TBA

Gravity waves, large-field inflation, and string theory

Early Universe phenomenology after BICEP

The Importance of Being Curved

B modes for galaxy surveys

Prospects for Future Measurements

Results from BICEP 2

Overview

Many-body localization with dipoles

Low Spin State Mott Insulators and Emergence of novel Quantum Spin Liquids

Recent developments in asymptotic safety: tests and properties

Playing with a Bouncing Universe

TBA

Gravity waves, large-field inflation, and string theory

Early Universe phenomenology after BICEP

The Importance of Being Curved

B modes for galaxy surveys

Prospects for Future Measurements

Results from BICEP 2

Overview

Many-body localization with dipoles

Low Spin State Mott Insulators and Emergence of novel Quantum Spin Liquids