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10429 - 10440 of 16421 Results

Quantum Field Theory 2 - Lecture 7

Francois David CEA Saclay
November 20, 2012

PIRSA:12110008
High Energy Physics
Statistical Mechanics - Lecture 6

John Berlinsky McMaster University

November 19, 2012

PIRSA:12110026
Quantum Field Theory 2 - Lecture 6

Francois David CEA Saclay
November 19, 2012

PIRSA:12110007
High Energy Physics
Superradiant Superconductivity

Baskaran Ganapathy Institute of Mathematical Sciences
November 16, 2012

PIRSA:12110071
Condensed Matter
Statistical Mechanics - Lecture 5

John Berlinsky McMaster University

November 16, 2012

PIRSA:12110023
Quantum Field Theory 2 - Lecture 5

Francois David CEA Saclay
November 16, 2012

PIRSA:12110004
High Energy Physics
Canonical tensor models with local time

Naoki Sasakura Yukawa Institute for Theoretical Physics
November 15, 2012

PIRSA:12110065
General Relativity & Quantum Cosmology
Detecting Gravitational Waves with Millisecond Pulsars

Paul Demorest National Radio Astronomy Observatory (NRAO)
November 15, 2012

PIRSA:12110044
General Relativity & Quantum Cosmology
Solid of Inflation: An alternative symmetry breaking pattern for an EFT of inflation

Solomon Endlich Stanford University
November 15, 2012

PIRSA:13010005
Astrophysics
Statistical Mechanics - Lecture 4

John Berlinsky McMaster University

November 15, 2012

PIRSA:12110022
Quantum Field Theory 2 - Lecture 4

Francois David CEA Saclay
November 15, 2012

PIRSA:12110003
High Energy Physics
Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe

John Moffat Perimeter Institute for Theoretical Physics
November 14, 2012

PIRSA:12110074
Astrophysics

Quantum Field Theory 2 - Lecture 7

Francois David CEA Saclay
November 20, 2012

PIRSA:12110008
High Energy Physics
Statistical Mechanics - Lecture 6

John Berlinsky McMaster University

November 19, 2012

PIRSA:12110026
Quantum Field Theory 2 - Lecture 6

Francois David CEA Saclay
November 19, 2012

PIRSA:12110007
High Energy Physics
Superradiant Superconductivity

Baskaran Ganapathy Institute of Mathematical Sciences
November 16, 2012

PIRSA:12110071
Condensed Matter
In Dicke Superradiance, a collection of 2-level atoms interacting with a single boson mode acquires, through quantum coherence, an enhanced emission property and a rich dynamics. We suggest possibility of Dicke superradiance in a BCS superconductor. The necessary 2-level atoms are identified with Anderson pseudo spins seeing a self consistent mean field in k-space. A way to couple these 2-level bose atoms to an external boson mode and create a novel non equilibrium superradiant superconductivity (SRSC) is suggested. Our mechanism offers a hope to realize transient superconductivity, even at room temperatures, in the pseudo gap phase of certain underdoped cuprates. Recent experiments are briefly discussed in this light. Further SRSC exhibits interesting quantum entanglement and superfluorescence properties.
Statistical Mechanics - Lecture 5

John Berlinsky McMaster University

November 16, 2012

PIRSA:12110023
Quantum Field Theory 2 - Lecture 5

Francois David CEA Saclay
November 16, 2012

PIRSA:12110004
High Energy Physics
Canonical tensor models with local time

Naoki Sasakura Yukawa Institute for Theoretical Physics
November 15, 2012

PIRSA:12110065
General Relativity & Quantum Cosmology
Tensor models are generalization of matrix models, and are studied as discrete models for quantum gravity for more than two-dimensions. Among them, the rank-three tensor models can be interpreted as theories of dynamical fuzzy spaces, and they generally have the feature of
respecting symmetries. In this talk, after briefly reviewing some results on Euclidean models such as spontaneous generation of fuzzy spaces and Euclidean general relativity respecting the diffeomorphism symmetry on them, I will present a way to introduce “local” time to the rank-three tensor models by constructing “local” Hamiltonians. The consistency among the multiple ways of local time evolutions is guaranteed by the on-shell closure of the constraint algebra among the
local Hamiltonians and the symmetry generators of the tensor models. The constraint algebra is shown to approach the DeWitt algebra in a formal continuum limit. I will also discuss the two-fold uniqueness of the local Hamiltonians, and will briefly show some preliminary results on the quantization.
Detecting Gravitational Waves with Millisecond Pulsars

Paul Demorest National Radio Astronomy Observatory (NRAO)
November 15, 2012

PIRSA:12110044
General Relativity & Quantum Cosmology
Millisecond spin-period radio pulsars provide us with unique astronomical "laboratories" for exploring fundamental physics in a variety of ways -- from the physics of matter at super-nuclear density, to experimental tests of gravity. They have also provided the only experimental evidence so far for the existence of gravitational waves (GW). A set of millisecond pulsars acting as precise astronomical clocks may also be used as a direct GW detector, sensitive to the nanohertz-frequency GW expected to be emitted by supermassive black hole binary systems or other more exotic sources. In this talk I will present the project status and recent GW upper limits from the NANOGrav project. I will also discuss expected near-future improvements in the measurement, including recent work aimed at better characterizing and mitigating the effect of multi-path propagation effects in the interstellar medium.
Solid of Inflation: An alternative symmetry breaking pattern for an EFT of inflation

Solomon Endlich Stanford University
November 15, 2012

PIRSA:13010005
Astrophysics
In this talk I will discuss a cosmological model where primordial inflation is driven by a `solid', defined as a system of three derivatively coupled scalar fields obeying certain symmetries and spontaneously breaking a certain subgroup of these. The symmetry breaking pattern differs drastically from that of standard inflationary models: time translations are unbroken. This prevents our model from fitting into the standard effective field theory description of adiabatic perturbations. Consequently, it exhibits a novel non-Gaussian `shape'.
Statistical Mechanics - Lecture 4

John Berlinsky McMaster University

November 15, 2012

PIRSA:12110022
Quantum Field Theory 2 - Lecture 4

Francois David CEA Saclay
November 15, 2012

PIRSA:12110003
High Energy Physics
Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe

John Moffat Perimeter Institute for Theoretical Physics
November 14, 2012

PIRSA:12110074
Astrophysics

Title	Date	Collection	Type	Info
Quantum Field Theory 2 - Lecture 7	2012‑11‑20	12/13 PSI - Quantum Field Theory 2	Course	View details
Statistical Mechanics - Lecture 6	2012‑11‑19	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 6	2012‑11‑19	12/13 PSI - Quantum Field Theory 2	Course	View details
Superradiant Superconductivity	2012‑11‑16	Quantum Matter	Scientific Series	View details
Statistical Mechanics - Lecture 5	2012‑11‑16	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 5	2012‑11‑16	12/13 PSI - Quantum Field Theory 2	Course	View details
Canonical tensor models with local time	2012‑11‑15	Quantum Gravity	Scientific Series	View details
Detecting Gravitational Waves with Millisecond Pulsars	2012‑11‑15	Strong Gravity	Scientific Series	View details
Solid of Inflation: An alternative symmetry breaking pattern for an EFT of inflation	2012‑11‑15	Cosmology and Gravitation	Scientific Series	View details
Statistical Mechanics - Lecture 4	2012‑11‑15	12/13 PSI - Statistical Mechanics	Course	View details
Quantum Field Theory 2 - Lecture 4	2012‑11‑15	12/13 PSI - Quantum Field Theory 2	Course	View details
Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe	2012‑11‑14	Cosmology and Gravitation	Other	View details

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Format results

Quantum Field Theory 2 - Lecture 7

Statistical Mechanics - Lecture 6

Quantum Field Theory 2 - Lecture 6

Superradiant Superconductivity

Statistical Mechanics - Lecture 5

Quantum Field Theory 2 - Lecture 5

Canonical tensor models with local time

Detecting Gravitational Waves with Millisecond Pulsars

Solid of Inflation: An alternative symmetry breaking pattern for an EFT of inflation

Statistical Mechanics - Lecture 4

Quantum Field Theory 2 - Lecture 4

Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe

Quantum Field Theory 2 - Lecture 7

Statistical Mechanics - Lecture 6

Quantum Field Theory 2 - Lecture 6

Superradiant Superconductivity

Statistical Mechanics - Lecture 5

Quantum Field Theory 2 - Lecture 5

Canonical tensor models with local time

Detecting Gravitational Waves with Millisecond Pulsars

Solid of Inflation: An alternative symmetry breaking pattern for an EFT of inflation

Statistical Mechanics - Lecture 4

Quantum Field Theory 2 - Lecture 4

Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe