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13/14 PSI - Gravitational Physics Review - Lecture 3

Ruth Gregory King's College London

January 08, 2014

PIRSA:14010029
13/14 PSI - Standard Model Review - Lecture 3

Paul Langacker Institute for Advanced Study (IAS)

January 08, 2014

PIRSA:14010010
Introduction to Quantum Field Theory for Cosmology - Lecture 1

Achim Kempf University of Waterloo

January 07, 2014

PIRSA:14010000
13/14 PSI - Gravitational Physics Review - Lecture 2

Ruth Gregory King's College London

January 07, 2014

PIRSA:14010028
13/14 PSI - Standard Model Review - Lecture 2

Paul Langacker Institute for Advanced Study (IAS)

January 07, 2014

PIRSA:14010009
13/14 PSI - Gravitational Physics Review - Lecture 1

Ruth Gregory King's College London

January 06, 2014

PIRSA:14010027
13/14 PSI - Standard Model Review - Lecture 1

Paul Langacker Institute for Advanced Study (IAS)

January 06, 2014

PIRSA:14010008
Scale-free primordial cosmology

Anna Ijjas Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
December 19, 2013

PIRSA:13120063
Cosmology
The Bose-Hubbard model is QMA-complete

David Gosset Institute for Quantum Computing (IQC)
December 18, 2013

PIRSA:13120067
Quantum Information
(0,4) sigma models and K3

Sarah Harrison Stanford University
December 18, 2013

PIRSA:13120071
Quantum Fields and Strings
A lattice non-perturbative definition of chiral fermion/gauge theory from Topological Order

Juven Wang Harvard University
December 13, 2013

PIRSA:13120069
Condensed Matter
Integrability (and Near Integrability) in Matrix-valued Field Theories

Axel Cortes Cubero City University of New York
December 13, 2013

PIRSA:13120068
Quantum Fields and Strings

13/14 PSI - Gravitational Physics Review - Lecture 3

Ruth Gregory King's College London

January 08, 2014

PIRSA:14010029
13/14 PSI - Standard Model Review - Lecture 3

Paul Langacker Institute for Advanced Study (IAS)

January 08, 2014

PIRSA:14010010
Introduction to Quantum Field Theory for Cosmology - Lecture 1

Achim Kempf University of Waterloo

January 07, 2014

PIRSA:14010000
13/14 PSI - Gravitational Physics Review - Lecture 2

Ruth Gregory King's College London

January 07, 2014

PIRSA:14010028
13/14 PSI - Standard Model Review - Lecture 2

Paul Langacker Institute for Advanced Study (IAS)

January 07, 2014

PIRSA:14010009
13/14 PSI - Gravitational Physics Review - Lecture 1

Ruth Gregory King's College London

January 06, 2014

PIRSA:14010027
13/14 PSI - Standard Model Review - Lecture 1

Paul Langacker Institute for Advanced Study (IAS)

January 06, 2014

PIRSA:14010008
Scale-free primordial cosmology

Anna Ijjas Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
December 19, 2013

PIRSA:13120063
Cosmology
The large-scale structure of the universe suggests that the physics underlying its early evolution is scale-free. In this talk, using a hydrodynamic approach, I will discuss how the scale-free principle restores predictive power and makes it possible to evaluate inflationary models and to compare them with alternative cosmologies.
The Bose-Hubbard model is QMA-complete

David Gosset Institute for Quantum Computing (IQC)
December 18, 2013

PIRSA:13120067
Quantum Information
The Bose-Hubbard model is a system of interacting bosons that live on the vertices of a graph. The particles can move between adjacent vertices and experience a repulsive on-site interaction. The Hamiltonian is determined by a choice of graph that specifies the geometry in which the particles move and interact. We prove that approximating the ground energy of the Bose-Hubbard model on a graph at fixed particle number is QMA-complete. In our QMA-hardness proof, we encode the history of an n-qubit computation in the subspace with at most one particle per site (i.e., hard-core bosons). This feature, along with the well-known mapping between hard-core bosons and spin systems, lets us prove a related result for a class of 2-local Hamiltonians defined by graphs that generalizes the XY model. By avoiding the use of perturbation theory in our analysis, we circumvent the need to multiply terms in the Hamiltonian by large coefficients. This is joint work with Andrew Childs and Zak Webb.
(0,4) sigma models and K3

Sarah Harrison Stanford University
December 18, 2013

PIRSA:13120071
Quantum Fields and Strings
TBA
A lattice non-perturbative definition of chiral fermion/gauge theory from Topological Order

Juven Wang Harvard University
December 13, 2013

PIRSA:13120069
Condensed Matter
A non-perturbative definition of anomaly-free chiral fermions and bosons in 1+1D spacetime as finite quantum systems on 1D lattice is proposed. In particular, any 1+1D anomaly-free chiral matter theory can be defined as finite quantum systems on 1D lattice with on-site symmetry, if we include strong interactions between matter fields. Our approach provides another way, apart from Ginsparg-Wilson fermions approach, to avoid the fermion-doubling challenge. In general, using the defining connection between gauge anomalies and the symmetry-protected topological orders, we propose that any truly anomaly-free chiral gauge theory can be non-perturbatively defined by putting it on a lattice in the same dimension. As an additional remark, we conjecture/prove the equivalence relation between 't Hooft anomaly matching conditions and the boundary fully gapping rules.
Integrability (and Near Integrability) in Matrix-valued Field Theories

Axel Cortes Cubero City University of New York
December 13, 2013

PIRSA:13120068
Quantum Fields and Strings
The principal chiral sigma model (PCSM) in 1+1 dimensions is asymptotically free and has as SU(N)-valued field with massive excitations. We have found all the exact form factors and two-point function of the Noether-current operators at large N using the integrable bootstrap program. At finite N, only the first non-trivial form factors are found, which give a good long distance approximation for the two-point function. We show how to use these new exact results to study non-integrable deformations. One example is the PCSM coupled to a Yang-Mills field. One can approximate the spectrum of the meson-like bound states using our form factors. We also examine an anisotropic version of (2+1)-dimensional Yang-Mills theory, which can be interpreted as an array of coupled PCSM’s.

Title	Date	Collection	Type	Info
13/14 PSI - Gravitational Physics Review - Lecture 3	2014‑01‑08	13/14 PSI - Gravitational Physics Review	Course	View details
13/14 PSI - Standard Model Review - Lecture 3	2014‑01‑08	13/14 PSI - Standard Model Review	Course	View details
Introduction to Quantum Field Theory for Cosmology - Lecture 1	2014‑01‑07	Quantum Field Theory for Cosmology - 2014	Course	View details
13/14 PSI - Gravitational Physics Review - Lecture 2	2014‑01‑07	13/14 PSI - Gravitational Physics Review	Course	View details
13/14 PSI - Standard Model Review - Lecture 2	2014‑01‑07	13/14 PSI - Standard Model Review	Course	View details
13/14 PSI - Gravitational Physics Review - Lecture 1	2014‑01‑06	13/14 PSI - Gravitational Physics Review	Course	View details
13/14 PSI - Standard Model Review - Lecture 1	2014‑01‑06	13/14 PSI - Standard Model Review	Course	View details
Scale-free primordial cosmology	2013‑12‑19	Cosmology and Gravitation	Scientific Series	View details
The Bose-Hubbard model is QMA-complete	2013‑12‑18	Perimeter Institute Quantum Discussions	Scientific Series	View details
(0,4) sigma models and K3	2013‑12‑18	Quantum Fields and Strings	Scientific Series	View details
A lattice non-perturbative definition of chiral fermion/gauge theory from Topological Order	2013‑12‑13	Quantum Matter	Scientific Series	View details
Integrability (and Near Integrability) in Matrix-valued Field Theories	2013‑12‑13	Quantum Fields and Strings	Scientific Series	View details

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