Talks

11377 - 11388 of 20132 Results

The Topology of Information Flow

Jamie Vicary University of Oxford

September 30, 2014

PIRSA:14090076
Irreversibility and Entanglement Spectrum Statistics in Quantum Circuits

Eduardo Mucciolo University of Central Florida

September 30, 2014

PIRSA:14090028

Condensed Matter
3d Gravity, Universality and Poincare Series

September 30, 2014

PIRSA:14090005
PHYS 781 - Lecture 4

Niayesh Afshordi University of Waterloo

September 30, 2014

PIRSA:14090085
ADMX: The Axion Dark Matter Experiment

Gray Rybka University of Washington

September 30, 2014

PIRSA:14090067

High Energy Physics
From Black Holes to Big Bang, and Back

Niayesh Afshordi University of Waterloo

September 30, 2014

PIRSA:14090088
PHYS 781 - Lecture 3

Niayesh Afshordi University of Waterloo

September 26, 2014

PIRSA:14090087
14/15 PSI Quantum Theory-15

Joseph Emerson Institute for Quantum Computing (IQC)

September 26, 2014

PIRSA:14090060
14/15 PSI - Relativity- Lecture 15

Neil Turok University of Edinburgh

September 26, 2014

PIRSA:14090064
PHYS 781 - Lecture 2

Niayesh Afshordi University of Waterloo

September 25, 2014

PIRSA:14090086
14/15 PSI Quantum Theory-14

Joseph Emerson Institute for Quantum Computing (IQC)

September 25, 2014

PIRSA:14090059
14/15 PSI - Relativity- Lecture 14

Neil Turok University of Edinburgh

September 25, 2014

PIRSA:14090063

The Topology of Information Flow

Jamie Vicary University of Oxford

September 30, 2014

PIRSA:14090076

I will outline a new topological foundation for computation, and show how it gives rise to a unified treatment of classical encryption and quantum teleportation, and a strong classical model for many quantum phenomena. This work connects to some other interesting topics, including quantum field theory, classical combinatorics, thermodynamics, Morse theory and higher category theory, which I will introduce in an elementary way.
Irreversibility and Entanglement Spectrum Statistics in Quantum Circuits

Eduardo Mucciolo University of Central Florida

September 30, 2014

PIRSA:14090028

Condensed Matter

We show that for a system evolving unitarily under a stochastic quantum circuit, the notions of irreversibility, universality of computation, and entanglement are closely related. As the state of the system evolves from an initial product state, it becomes increasingly entangled until entanglement reaches a maximum. We define irreversibility as the failure to find a circuit that disentangles a maximally entangled state. We show that irreversibility occurs when maximally entangled states are generated with a quantum circuit formed by gates from a universal quantum computation set. We find that irreversibility is also associated to a Wigner-Dyson statistics in the fluctuations of spacings between adjacent eigenvalues of the system’s reduced density matrix. In contrast, when the system is evolved with a non-universal set of gates, the statistics of the entanglement spacing deviates from Wigner-Dyson and the disentangling algorithm succeeds. We discuss how these findings open a new way to characterize non-integrability in quantum systems.
3d Gravity, Universality and Poincare Series

September 30, 2014

PIRSA:14090005

Modular invariance plays an important role in the AdS3/CFT2 correspondence. Using modular invariance, I discuss under what conditions a 2d CFT shows a Hawking-Page phase transition in the large c limit, and what this implies for the range of validity of the Cardy formula and the universality of its spectrum. I will also discuss partition functions obtained by summing over the modular group, how their properties are compatible with their gravity interpretation, and briefly touch on implications for the existence of pure gravity.
PHYS 781 - Lecture 4

Niayesh Afshordi University of Waterloo

September 30, 2014

PIRSA:14090085
ADMX: The Axion Dark Matter Experiment

Gray Rybka University of Washington

September 30, 2014

PIRSA:14090067

High Energy Physics

Axions are an exceptionally well-motivated dark matter candidate in addition to being a consequence of the Peccei-Quinn solution to the strong CP problem. ADMX (Axion Dark Matter eXperiment) has recently been selected as the axion search for the US DOE Second-Generation Dark Matter Program. I will discuss the imminent upgrade of ADMX to a definitive search for micro-eV mass dark matter axions as well as the ongoing research and development of new technologies to expand the reach of ADMX to the entire plausible dark matter axion mass range.
From Black Holes to Big Bang, and Back

Niayesh Afshordi University of Waterloo

September 30, 2014

PIRSA:14090088

By now, both black hole astrophysics and big bang cosmology are empirically well-established disciplines of physics and astronomy. They are also the only circumstances in nature where Einstein's general relativity can be seen in its full glory, and yet contain within them, its eventual and inevitable folly. Here, I will outline subtle lines evidence for why a phenomenologically successful description of big bang cosmology and black hole horizons may be intimately connected. These lines include a holographic description of big bang, thermal tachyacoustic cosmology, and the firewall controversy. Astrophysical observations, ranging from CMB and dark energy probes, to astrophysical neutrinos could shed further light on these potential connections.
PHYS 781 - Lecture 3

Niayesh Afshordi University of Waterloo

September 26, 2014

PIRSA:14090087
14/15 PSI Quantum Theory-15

Joseph Emerson Institute for Quantum Computing (IQC)

September 26, 2014

PIRSA:14090060
14/15 PSI - Relativity- Lecture 15

Neil Turok University of Edinburgh

September 26, 2014

PIRSA:14090064
PHYS 781 - Lecture 2

Niayesh Afshordi University of Waterloo

September 25, 2014

PIRSA:14090086
14/15 PSI Quantum Theory-14

Joseph Emerson Institute for Quantum Computing (IQC)

September 25, 2014

PIRSA:14090059
14/15 PSI - Relativity- Lecture 14

Neil Turok University of Edinburgh

September 25, 2014

PIRSA:14090063

Title	Date	Collection	Type	Info
The Topology of Information Flow	2014‑09‑30	Quantum Foundations	Scientific Series	View details
Irreversibility and Entanglement Spectrum Statistics in Quantum Circuits	2014‑09‑30	Quantum Matter	Scientific Series	View details
3d Gravity, Universality and Poincare Series	2014‑09‑30	Quantum Fields and Strings	Scientific Series	View details
PHYS 781 - Lecture 4	2014‑09‑30	PHYS 781 - Fundamentals of Astrophysics	Course	View details
ADMX: The Axion Dark Matter Experiment	2014‑09‑30	Particle Physics	Scientific Series	View details
From Black Holes to Big Bang, and Back	2014‑09‑30	Cosmology and Gravitation	Scientific Series	View details
PHYS 781 - Lecture 3	2014‑09‑26	PHYS 781 - Fundamentals of Astrophysics	Course	View details
14/15 PSI Quantum Theory-15	2014‑09‑26	14/15 PSI - Quantum Theory	Course	View details
14/15 PSI - Relativity- Lecture 15	2014‑09‑26	14/15 PSI -Relativity	Course	View details
PHYS 781 - Lecture 2	2014‑09‑25	PHYS 781 - Fundamentals of Astrophysics	Course	View details
14/15 PSI Quantum Theory-14	2014‑09‑25	14/15 PSI - Quantum Theory	Course	View details
14/15 PSI - Relativity- Lecture 14	2014‑09‑25	14/15 PSI -Relativity	Course	View details

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Format results

The Topology of Information Flow

Irreversibility and Entanglement Spectrum Statistics in Quantum Circuits

3d Gravity, Universality and Poincare Series

PHYS 781 - Lecture 4

ADMX: The Axion Dark Matter Experiment

From Black Holes to Big Bang, and Back

PHYS 781 - Lecture 3

14/15 PSI Quantum Theory-15

14/15 PSI - Relativity- Lecture 15

PHYS 781 - Lecture 2

14/15 PSI Quantum Theory-14

14/15 PSI - Relativity- Lecture 14

The Topology of Information Flow

Irreversibility and Entanglement Spectrum Statistics in Quantum Circuits

3d Gravity, Universality and Poincare Series

PHYS 781 - Lecture 4

ADMX: The Axion Dark Matter Experiment

From Black Holes to Big Bang, and Back

PHYS 781 - Lecture 3

14/15 PSI Quantum Theory-15

14/15 PSI - Relativity- Lecture 15

PHYS 781 - Lecture 2

14/15 PSI Quantum Theory-14

14/15 PSI - Relativity- Lecture 14