Talks

13981 - 13992 of 22691 Results

An invariant of topologically ordered states under local unitary transformations

Jeongwan Haah Massachusetts Institute of Technology (MIT) - Department of Physics

September 10, 2014

PIRSA:14090030

Quantum Physics
Short-Range Entangled Phases and Topology

Anton Kapustin California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy

September 10, 2014

PIRSA:14090002
14/15 PSI Quantum Theory-3

Joseph Emerson Institute for Quantum Computing (IQC)

September 10, 2014

PIRSA:14090044
14/15 PSI - Relativity- Lecture 3

Neil Turok University of Edinburgh

September 10, 2014

PIRSA:14090009
Many-Body Localization in translation invariant systems?

Francois Huveneers University of Paris-Saclay

September 09, 2014

PIRSA:14090027
14/15 PSI Quantum Theory-2

Joseph Emerson Institute for Quantum Computing (IQC)

September 09, 2014

PIRSA:14090043
14/15 PSI - Relativity- Lecture 2

Neil Turok University of Edinburgh

September 09, 2014

PIRSA:14090008
14/15 PSI - Quantum Theory-1

Joseph Emerson Institute for Quantum Computing (IQC)

September 08, 2014

PIRSA:14090026
14/15 PSI - Relativity- Lecture 1

Neil Turok University of Edinburgh

September 08, 2014

PIRSA:14090007
14/15 PSI - Mathematica-4

Erik Schnetter Perimeter Institute for Theoretical Physics

September 05, 2014

PIRSA:14090040
14/15 PSI - Green Functions-4

Denis Dalidovich

September 05, 2014

PIRSA:14090036
Firewalls- A GR perspective

Bill Unruh University of British Columbia

September 04, 2014

PIRSA:14090066

General Relativity & Quantum Cosmology

An invariant of topologically ordered states under local unitary transformations

Jeongwan Haah Massachusetts Institute of Technology (MIT) - Department of Physics

September 10, 2014

PIRSA:14090030

Quantum Physics

For an anyon model in two spatial dimensions described by a modular tensor category, the topological S-matrix encodes the mutual braiding statistics, the quantum dimensions, and the fusion rules of anyons. It is nontrivial whether one can compute the topological S-matrix from a single ground state wave function. In this talk, I will show that, for a class of Hamiltonians, it is possible to define the S-matrix regardless of the degeneracy of the ground state. The definition manifests invariance of the S-matrix under local unitary transformations (quantum circuits). The defined S-matrix depends only on the ground state, in the sense that it can be computed by any Hamiltonian in the class of which the state is a ground state. This property, together with the local unitary invariance implies that any quantum circuit that connects two ground states of distinct topological S-matrices must have depth that is at least linear in the diameter of the system. A higher dimensional analog is straightforward. [arXiv:1407.2926]
Short-Range Entangled Phases and Topology

Anton Kapustin California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy

September 10, 2014

PIRSA:14090002

Recently a new and rather unexpected connection between condensed matter physics and algebraic topology has been noted. Namely, it appears that phases of matter with an energy gap, no long-range entanglement, and fixed symmetry can be classified using cobordism theory. I will exhibit several examples of this connection and describe a possible explanation.
14/15 PSI Quantum Theory-3

Joseph Emerson Institute for Quantum Computing (IQC)

September 10, 2014

PIRSA:14090044
14/15 PSI - Relativity- Lecture 3

Neil Turok University of Edinburgh

September 10, 2014

PIRSA:14090009
Many-Body Localization in translation invariant systems?

Francois Huveneers University of Paris-Saclay

September 09, 2014

PIRSA:14090027

Roughly speaking, Many-Body Localization (MBL) refers to the state of a material that fails to thermalize. Though MBL has mostly been studied in quenched disordered systems, several authors have recently proposed that this phase could be realized in clean (translation invariant) systems too. In this talk, I will discuss this idea and ask to which extent an MBL phase can indeed be expected in systems without quenched disorder. Hopefully, the discussion shed also some light on the localization-delocalization transition for more generic many-body systems. From joint work with W. De Roeck (Leuven), M. Mueller (Trieste), M. Schiulaz (Trieste).
14/15 PSI Quantum Theory-2

Joseph Emerson Institute for Quantum Computing (IQC)

September 09, 2014

PIRSA:14090043
14/15 PSI - Relativity- Lecture 2

Neil Turok University of Edinburgh

September 09, 2014

PIRSA:14090008
14/15 PSI - Quantum Theory-1

Joseph Emerson Institute for Quantum Computing (IQC)

September 08, 2014

PIRSA:14090026
14/15 PSI - Relativity- Lecture 1

Neil Turok University of Edinburgh

September 08, 2014

PIRSA:14090007
14/15 PSI - Mathematica-4

Erik Schnetter Perimeter Institute for Theoretical Physics

September 05, 2014

PIRSA:14090040
14/15 PSI - Green Functions-4

Denis Dalidovich

September 05, 2014

PIRSA:14090036
Firewalls- A GR perspective

Bill Unruh University of British Columbia

September 04, 2014

PIRSA:14090066

General Relativity & Quantum Cosmology

This talk will examine the Firewall argument and a number of possible approaches to it, with a variety of simple examples to try to clarify various aspects of the arguments.

Title	Date	Collection	Type	Info
An invariant of topologically ordered states under local unitary transformations	2014‑09‑10	Perimeter Institute Quantum Discussions	Scientific Series	View details
Short-Range Entangled Phases and Topology	2014‑09‑10	Colloquium	Scientific Series	View details
14/15 PSI Quantum Theory-3	2014‑09‑10	14/15 PSI - Quantum Theory	Course	View details
14/15 PSI - Relativity- Lecture 3	2014‑09‑10	14/15 PSI -Relativity	Course	View details
Many-Body Localization in translation invariant systems?	2014‑09‑09	Quantum Matter	Scientific Series	View details
14/15 PSI Quantum Theory-2	2014‑09‑09	14/15 PSI - Quantum Theory	Course	View details
14/15 PSI - Relativity- Lecture 2	2014‑09‑09	14/15 PSI -Relativity	Course	View details
14/15 PSI - Quantum Theory-1	2014‑09‑08	14/15 PSI - Quantum Theory	Course	View details
14/15 PSI - Relativity- Lecture 1	2014‑09‑08	14/15 PSI -Relativity	Course	View details
14/15 PSI - Mathematica-4	2014‑09‑05	14/15 PSI - Front End	Course	View details
14/15 PSI - Green Functions-4	2014‑09‑05	14/15 PSI - Front End	Course	View details
Firewalls- A GR perspective	2014‑09‑04	Quantum Gravity	Scientific Series	View details

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An invariant of topologically ordered states under local unitary transformations

Short-Range Entangled Phases and Topology

14/15 PSI Quantum Theory-3

14/15 PSI - Relativity- Lecture 3

Many-Body Localization in translation invariant systems?

14/15 PSI Quantum Theory-2

14/15 PSI - Relativity- Lecture 2

14/15 PSI - Quantum Theory-1

14/15 PSI - Relativity- Lecture 1

14/15 PSI - Mathematica-4

14/15 PSI - Green Functions-4

Firewalls- A GR perspective

An invariant of topologically ordered states under local unitary transformations

Short-Range Entangled Phases and Topology

14/15 PSI Quantum Theory-3

14/15 PSI - Relativity- Lecture 3

Many-Body Localization in translation invariant systems?

14/15 PSI Quantum Theory-2

14/15 PSI - Relativity- Lecture 2

14/15 PSI - Quantum Theory-1

14/15 PSI - Relativity- Lecture 1

14/15 PSI - Mathematica-4

14/15 PSI - Green Functions-4

Firewalls- A GR perspective