Talks

10141 - 10152 of 16754 Results

Closing Remarks

July 25, 2013

PIRSA:13070094
Canonical Quantum Gravity - 4

Suzanne Lanery Universidad Nacional Autónoma De Mexico (UNAM)

Maximilian Hanusch Universität Paderborn

Yongge Ma Beijing Normal University

July 25, 2013

PIRSA:13070078
Group Field Theory and Tensor Models - 2

Stephane Dartois École Normale Supérieure de Lyon (ENS Lyon)

Lorenzo Sindoni Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)

Joseph Ben Geloun Laboratoire d'Informatique de Paris-Nord (LIPN)

Dine Ousmane Samary CEA Saclay

July 25, 2013

PIRSA:13070076
Discrete Approaches - 3

Ghanashyam Date Institute of Mathematical Sciences

Jacek Puchta University of Warsaw

Bianca Dittrich Perimeter Institute for Theoretical Physics

Sumati Surya Raman Research Institute

July 25, 2013

PIRSA:13070079
Phenomenology - 4

Stefano Bianco Sapienza University of Rome

Giovanni Amelino-Camelia Sapienza Università di Roma - Dipartimento di Fisica

Angel Ballesteros Universidad de Burgos

Hans Westman

July 25, 2013

PIRSA:13070077
Group Field Theory and Tensor Models - 1

Matti Raasakka Université Sorbonne Paris Nord (Paris 13)

Thomas Krajewski Aix-Marseille University

Daniele Oriti Complutense University of Madrid

James Ryan Vinted (Germany)

Valentin Bonzom Gustave Eiffel University

July 25, 2013

PIRSA:13070072
Canonical Quantum Gravity - 3

Casey Tomlin Pennsylvania State University

Saeed Rastgoo Universidad Nacional Autónoma de México (UNAM) - Centro de Ciencias Matematicas

Javier Olmedo Pennsylvania State University

Alexander Stottmeister University of Erlangen-Nuremberg

July 25, 2013

PIRSA:13070074
Phenomenology - 3

Ivette Fuentes University of Southampton

Stephon Alexander Brown University

Astrid Eichhorn Universität Heidelberg

Djordje Minic Virginia Polytechnic Institute and State University

Antonino Marciano Fudan University

July 25, 2013

PIRSA:13070073
Discrete Approaches - 2

Aaron Trout Chatham University

Philipp Hoehn Okinawa Institute of Science and Technology Graduate University

July 25, 2013

PIRSA:13070075
Causal Dynamical Triangulations without Preferred Foliation

Renate Loll Radboud Universiteit Nijmegen

July 25, 2013

PIRSA:13070071
Towards a Consistent Quantum Dynamics for Euclidean LQG: A Weak Coupling Limit

Madhavan Varadarajan Raman Research Institute

July 25, 2013

PIRSA:13070080
Casual Sets and the Quantum Action

Fay Dowker Imperial College London

July 25, 2013

PIRSA:13070069

Closing Remarks

July 25, 2013

PIRSA:13070094
Canonical Quantum Gravity - 4

Suzanne Lanery Universidad Nacional Autónoma De Mexico (UNAM)

Maximilian Hanusch Universität Paderborn

Yongge Ma Beijing Normal University

July 25, 2013

PIRSA:13070078
Group Field Theory and Tensor Models - 2

Stephane Dartois École Normale Supérieure de Lyon (ENS Lyon)

Lorenzo Sindoni Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)

Joseph Ben Geloun Laboratoire d'Informatique de Paris-Nord (LIPN)

Dine Ousmane Samary CEA Saclay

July 25, 2013

PIRSA:13070076
Discrete Approaches - 3

Ghanashyam Date Institute of Mathematical Sciences

Jacek Puchta University of Warsaw

Bianca Dittrich Perimeter Institute for Theoretical Physics

Sumati Surya Raman Research Institute

July 25, 2013

PIRSA:13070079
Phenomenology - 4

Stefano Bianco Sapienza University of Rome

Giovanni Amelino-Camelia Sapienza Università di Roma - Dipartimento di Fisica

Angel Ballesteros Universidad de Burgos

Hans Westman

July 25, 2013

PIRSA:13070077
Group Field Theory and Tensor Models - 1

Matti Raasakka Université Sorbonne Paris Nord (Paris 13)

Thomas Krajewski Aix-Marseille University

Daniele Oriti Complutense University of Madrid

James Ryan Vinted (Germany)

Valentin Bonzom Gustave Eiffel University

July 25, 2013

PIRSA:13070072
Canonical Quantum Gravity - 3

Casey Tomlin Pennsylvania State University

Saeed Rastgoo Universidad Nacional Autónoma de México (UNAM) - Centro de Ciencias Matematicas

Javier Olmedo Pennsylvania State University

Alexander Stottmeister University of Erlangen-Nuremberg

July 25, 2013

PIRSA:13070074
Phenomenology - 3

Ivette Fuentes University of Southampton

Stephon Alexander Brown University

Astrid Eichhorn Universität Heidelberg

Djordje Minic Virginia Polytechnic Institute and State University

Antonino Marciano Fudan University

July 25, 2013

PIRSA:13070073
Discrete Approaches - 2

Aaron Trout Chatham University

Philipp Hoehn Okinawa Institute of Science and Technology Graduate University

July 25, 2013

PIRSA:13070075
Causal Dynamical Triangulations without Preferred Foliation

Renate Loll Radboud Universiteit Nijmegen

July 25, 2013

PIRSA:13070071

We introduce a generalized version of the Causal Dynamical Triangulations (CDT) formulation of quantum gravity, in which the regularized, triangulated path integral histories maintain their causal properties, but do not have a preferred proper-time foliation. An extensive numerical study of the associated nonperturbative path integral in 2+1 dimensions shows that it can nevertheless reproduce the emergence of an extended de Sitter universe on large scales, a key feature of CDT quantum gravity. This suggests that the preferred foliation normally used in CDT is not a crucial (although convenient) part of its background structure.
Towards a Consistent Quantum Dynamics for Euclidean LQG: A Weak Coupling Limit

Madhavan Varadarajan Raman Research Institute

July 25, 2013

PIRSA:13070080

Spacetime covariance in canonical quantum gravity is tied to the existence of an anomaly free representation of its constraint algebra. I will argue that establishing the existence of such a representation in the LQG context requires the consideration of higher than unit density weight Hamiltonian constraints. Smolin's weak coupling limit of Euclidean gravity, while simpler than full blown gravity , still exhibits an open constraint algebra isomorphic to that of gravity and offers an ideal testing ground for the investigation of the quantum constraint algebra of such higher density constraints. I will report on recent progress on this issue in the context of an LQG type quantization of this system. Certain features of the constructions such as the encoding of the action of the quantum constraint in terms of operator valued diffeomorphisms may play a key role in the definition of a consistent quantum dynamics for LQG.
Casual Sets and the Quantum Action

Fay Dowker Imperial College London

July 25, 2013

PIRSA:13070069

The struggle between local and global concepts in physics comes to a head in causal set quantum gravity. Local physics -- and general relativity in particular -- must be recovered in a continuum approximation if the theory is to be successful but causal sets are inherently non-local entities. I will describe a family of causal set actions labelled by dimension, each of which is nonlocal and yet, when applied to certain causal sets, approximates the Einstein Hilbert action and is therefore effectively local. I will explain why this is a source of hope that causal set theory has a continuum approximation.

Title	Date	Collection	Type	Info
Closing Remarks	2013‑07‑25	Loops 13	Conference	View details
Canonical Quantum Gravity - 4	2013‑07‑25	Loops 13	Conference	View details
Group Field Theory and Tensor Models - 2	2013‑07‑25	Loops 13	Conference	View details
Discrete Approaches - 3	2013‑07‑25	Loops 13	Conference	View details
Phenomenology - 4	2013‑07‑25	Loops 13	Conference	View details
Group Field Theory and Tensor Models - 1	2013‑07‑25	Loops 13	Conference	View details
Canonical Quantum Gravity - 3	2013‑07‑25	Loops 13	Conference	View details
Phenomenology - 3	2013‑07‑25	Loops 13	Conference	View details
Discrete Approaches - 2	2013‑07‑25	Loops 13	Conference	View details
Causal Dynamical Triangulations without Preferred Foliation	2013‑07‑25	Loops 13	Conference	View details
Towards a Consistent Quantum Dynamics for Euclidean LQG: A Weak Coupling Limit	2013‑07‑25	Loops 13	Conference	View details
Casual Sets and the Quantum Action	2013‑07‑25	Loops 13	Conference	View details

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