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12/13 PSI - Explorations in Particle Theory Lecture 11

David Morrissey TRIUMF
April 02, 2013

PIRSA:13040039
Particle Physics
Shake, Rattle and Explode: Short GRBs and the Electromagnetic Counterparts of Gravitational Wave Sources

Edo Berger Harvard University
April 02, 2013

PIRSA:13040081
Cosmology

Strong Gravity
12/13 PSI - Explorations on Quantum Information Lecture 11

David Cory Institute for Quantum Computing (IQC)
April 02, 2013

PIRSA:13040034
Quantum Information
12/13 PSI - Explorations in Particle Theory Lecture 10

David Morrissey TRIUMF
April 01, 2013

PIRSA:13040038
Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 10

David Cory Institute for Quantum Computing (IQC)
April 01, 2013

PIRSA:13040033
Quantum Information
Advanced General Relativity - Lecture 20

Rafael Sorkin Perimeter Institute for Theoretical Physics

March 28, 2013

PIRSA:13030029
S=1 spin liquid with fermionic excitations

Maksym Serbyn Massachusetts Institute of Technology (MIT)
March 28, 2013

PIRSA:13030113
Condensed Matter
Canonical gravity using unconstrained null initial data

Michael Reisenberger Universidad de la Republica Uruguay
March 28, 2013

PIRSA:13030092
Strong Gravity
12/13 PSI - Explorations in Particle Theory Lecture 9

David Morrissey TRIUMF
March 28, 2013

PIRSA:13030075
Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 9

David Cory Institute for Quantum Computing (IQC)
March 28, 2013

PIRSA:13030064
Quantum Information
Quoins versus Coins

Terry Rudolph Imperial College London
March 27, 2013

PIRSA:13030000
Quantum Information
12/13 PSI - Explorations in Particle Theory Lecture 8

David Morrissey TRIUMF
March 27, 2013

PIRSA:13030074
Particle Physics

12/13 PSI - Explorations in Particle Theory Lecture 11

David Morrissey TRIUMF
April 02, 2013

PIRSA:13040039
Particle Physics
Shake, Rattle and Explode: Short GRBs and the Electromagnetic Counterparts of Gravitational Wave Sources

Edo Berger Harvard University
April 02, 2013

PIRSA:13040081
Cosmology

Strong Gravity
The bimodality of gamma-ray burst (GRB) durations points to distinct progenitor classes for the long- and short-duration GRBs. While the progenitors of long-duration GRBs are now known to be massive stars, the progenitors of short-duration GRBs remain unidentified. In this talk I will discuss the discovery of short GRB afterglow and their host galaxies, detailed studies of their environments from parsec to galactic scales, and studies of their energetics and beaming. Taken together, these observations point to the coalescence of NS-NS/NS-BH binaries as the most likely progenitors. With the upcoming Advanced LIGO/VIRGO gravitational wave detectors it is therefore possible that short GRBs will be the first detected sources, and I will discuss various approaches to making this connection between gravitational wave and electromagnetic sources.
12/13 PSI - Explorations on Quantum Information Lecture 11

David Cory Institute for Quantum Computing (IQC)
April 02, 2013

PIRSA:13040034
Quantum Information
12/13 PSI - Explorations in Particle Theory Lecture 10

David Morrissey TRIUMF
April 01, 2013

PIRSA:13040038
Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 10

David Cory Institute for Quantum Computing (IQC)
April 01, 2013

PIRSA:13040033
Quantum Information
Advanced General Relativity - Lecture 20

Rafael Sorkin Perimeter Institute for Theoretical Physics

March 28, 2013

PIRSA:13030029
S=1 spin liquid with fermionic excitations

Maksym Serbyn Massachusetts Institute of Technology (MIT)
March 28, 2013

PIRSA:13030113
Condensed Matter
In the first part of my talk I describe a search for possible quantum spin liquid ground states for spin S=1 Heisenberg models on the triangular lattice which was motivated by recent experiments on Ba3NiSb2O9. We use representation of spin-1 via three flavors of fermionic spinon operators. The ground state where one gapless flavor of spinons with a Fermi surface coexists with d+id topological pairing of the two other flavors can explain available experimental data. Despite the existence of a Fermi surface, this spin liquid state has fully gapped bulk spin excitations. This results in a linear in-temperature specific heat and constant in-plane spin susceptibility, with an unusually high Wilson ratio. Using variational Monte Carlo technique, we show that proposed spin liquid ground state is realized in an SU(3)-invariant model with sufficiently strong ring-exchange terms. In the second part, I consider the physics of the magnetic s=1/2 impurity embedded in a S=1 spin liquid, where all three flavors of spinons have a Fermi surface. The interplay between non-Fermi-liquid behavior induced by a U(1) gauge field coupled to fermions, and a non-Fermi-liquid fixed point in the overscreened Kondo problem is studied using double expansion. The gauge field changes the physical properties of the system at the overscreened Kondo fixed point. Thus, spin-half impurity in such spin liquid can be used to probe the presence of fermionic spinons coupled to the gauge field. References: arXiv:1108.3070, arXiv:1208.3231 and arXiv:1212.5179
Canonical gravity using unconstrained null initial data

Michael Reisenberger Universidad de la Republica Uruguay
March 28, 2013

PIRSA:13030092
Strong Gravity
12/13 PSI - Explorations in Particle Theory Lecture 9

David Morrissey TRIUMF
March 28, 2013

PIRSA:13030075
Particle Physics
12/13 PSI - Explorations on Quantum Information Lecture 9

David Cory Institute for Quantum Computing (IQC)
March 28, 2013

PIRSA:13030064
Quantum Information
Quoins versus Coins

Terry Rudolph Imperial College London
March 27, 2013

PIRSA:13030000
Quantum Information
Human monkeys are used to thinking about the problem of choosing from a set of objects according to some desired, biased, probability distribution. Just think about how you chose your partner(s). Even when it is easy for you to do such a sampling, it can be difficult to do a quantum sampling (Q-Sampling) of the same distribution. By Q-Sampling I mean the creation of a coherent superposition of states of such objects whose amplitudes are the (square roots of) of the specified distribution. In this talk I will discuss what we do know about this problem, why it is interesting, and will discuss how it can let us achieve tasks with quantum information that are provably impossible classically.
12/13 PSI - Explorations in Particle Theory Lecture 8

David Morrissey TRIUMF
March 27, 2013

PIRSA:13030074
Particle Physics

Title	Date	Collection	Type	Info
12/13 PSI - Explorations in Particle Theory Lecture 11	2013‑04‑02	12/13 PSI - Explorations in Particle Theory	Course	View details
Shake, Rattle and Explode: Short GRBs and the Electromagnetic Counterparts of Gravitational Wave Sources	2013‑04‑02	Strong Gravity	Scientific Series	View details
12/13 PSI - Explorations on Quantum Information Lecture 11	2013‑04‑02	12/13 PSI - Explorations on Quantum Information	Course	View details
12/13 PSI - Explorations in Particle Theory Lecture 10	2013‑04‑01	12/13 PSI - Explorations in Particle Theory	Course	View details
12/13 PSI - Explorations on Quantum Information Lecture 10	2013‑04‑01	12/13 PSI - Explorations on Quantum Information	Course	View details
Advanced General Relativity - Lecture 20	2013‑03‑28	Elements of General Relativity	Course	View details
S=1 spin liquid with fermionic excitations	2013‑03‑28	Quantum Matter	Scientific Series	View details
Canonical gravity using unconstrained null initial data	2013‑03‑28	Quantum Gravity	Scientific Series	View details
12/13 PSI - Explorations in Particle Theory Lecture 9	2013‑03‑28	12/13 PSI - Explorations in Particle Theory	Course	View details
12/13 PSI - Explorations on Quantum Information Lecture 9	2013‑03‑28	12/13 PSI - Explorations on Quantum Information	Course	View details
Quoins versus Coins	2013‑03‑27	Colloquium	Scientific Series	View details
12/13 PSI - Explorations in Particle Theory Lecture 8	2013‑03‑27	12/13 PSI - Explorations in Particle Theory	Course	View details

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