Talks

12961 - 12972 of 20131 Results

Pinning of Fermionic Occupation Numbers

Christian Schilling ETH Zurich

January 21, 2013

PIRSA:13010105

Quantum Physics
12/13 PSI - Found Quantum Mechanics Lecture 11

Robert Spekkens Perimeter Institute for Theoretical Physics

January 21, 2013

PIRSA:13010080

High Energy Physics
12/13 PSI - String Theory Review Lecture 11

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 21, 2013

PIRSA:13010061

High Energy Physics
12/13 PSI - Standard Model Review Lecture 11

Mark Wise California Institute of Technology (Caltech)

January 21, 2013

PIRSA:13010038

High Energy Physics
Indirect Searches for Dark Matter with the Fermi Large Area Telescope

Andrea Marie Albert Ohio State University

January 18, 2013

PIRSA:13010102

High Energy Physics
12/13 PSI - Found Quantum Mechanics Lecture 10

Robert Spekkens Perimeter Institute for Theoretical Physics

January 18, 2013

PIRSA:13010077

High Energy Physics
12/13 PSI - String Theory Review Lecture 10

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 18, 2013

PIRSA:13010058

High Energy Physics
12/13 PSI - Standard Model Review Lecture 10

Mark Wise California Institute of Technology (Caltech)

January 18, 2013

PIRSA:13010035

High Energy Physics
The black hole information paradox and its resolution

Ted Jacobson University of Maryland, College Park

January 17, 2013

PIRSA:13010021

General Relativity & Quantum Cosmology
12/13 PSI - Found Quantum Mechanics Lecture 9

Robert Spekkens Perimeter Institute for Theoretical Physics

January 17, 2013

PIRSA:13010076

High Energy Physics
12/13 PSI - String Theory Review Lecture 9

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 17, 2013

PIRSA:13010057

High Energy Physics
12/13 PSI - Standard Model Review Lecture 9

Mark Wise California Institute of Technology (Caltech)

January 17, 2013

PIRSA:13010034

High Energy Physics

Pinning of Fermionic Occupation Numbers

Christian Schilling ETH Zurich

January 21, 2013

PIRSA:13010105

Quantum Physics

The problem of determining and describing the family of 1-particle reduced density operators (1-RDO) arising from N-fermion pure states (viapartial trace) is known as the fermionic quantum marginal problem. We present its solution, a multitude of constraints on the eigenvalues of the 1-RDO, generalizing the Pauli exclusion principle. To explore the relevance of these constraints we study an analytically solvable model of N fermions in a harmonic potential and determine the spectral `trajectory' corresponding to the ground state as function of the fermion-fermion interaction strength.Intriguingly, we find that the occupation numbers are almost, but not exactly, pinned to the boundary of the allowed region (quasi-pinned). Our findings suggest a generalization of the Hartree-Fock approximation.

see also: http://arxiv.org/abs/1210.5531
12/13 PSI - Found Quantum Mechanics Lecture 11

Robert Spekkens Perimeter Institute for Theoretical Physics

January 21, 2013

PIRSA:13010080

High Energy Physics
12/13 PSI - String Theory Review Lecture 11

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 21, 2013

PIRSA:13010061

High Energy Physics
12/13 PSI - Standard Model Review Lecture 11

Mark Wise California Institute of Technology (Caltech)

January 21, 2013

PIRSA:13010038

High Energy Physics
Indirect Searches for Dark Matter with the Fermi Large Area Telescope

Andrea Marie Albert Ohio State University

January 18, 2013

PIRSA:13010102

High Energy Physics

There is overwhelming evidence that non-baryonic dark matter constitutes ~23% of the energy density of the universe. Weakly Interacting Massive Particles (WIMPs) are promising dark matter candidates that may produce gamma rays via annihilation or decay detectable by the Fermi Large Area Telescope (Fermi LAT). A detection of WIMPs would also indicate the existence of physics beyond the Standard Model. I will present recent results from indirect WIMP searches by the Fermi LAT Collaboration. I will focus on our recent search for gamma-ray spectral lines from WIMP annihilations with 4 years of data. There has been recent excitement with the report of a line-like feature localized in the galactic center around 130 GeV. I will be discussing what our search finds and the systematic checks we've performed on potential signals.
12/13 PSI - Found Quantum Mechanics Lecture 10

Robert Spekkens Perimeter Institute for Theoretical Physics

January 18, 2013

PIRSA:13010077

High Energy Physics
12/13 PSI - String Theory Review Lecture 10

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 18, 2013

PIRSA:13010058

High Energy Physics
12/13 PSI - Standard Model Review Lecture 10

Mark Wise California Institute of Technology (Caltech)

January 18, 2013

PIRSA:13010035

High Energy Physics
The black hole information paradox and its resolution

Ted Jacobson University of Maryland, College Park

January 17, 2013

PIRSA:13010021

General Relativity & Quantum Cosmology

Both AdS/CFT duality and more general reasoning from quantum gravity point to a rich collection of boundary observables that always evolve unitarily. The physical quantum gravity states described by these observables must be solutions of the spatial diffeomorphism and Wheeler-deWitt constraints, which implies that the state space does not factorize into a tensor product of localized degrees of freedom. The "firewall" argument that unitarity of black hole evaporation is incompatible with a regular near horizon region is based on such a factorization, hence is not applicable in quantum gravity. A version of black hole complementarity resolves the apparent conflict. (I will also discuss doubts and questions.)
12/13 PSI - Found Quantum Mechanics Lecture 9

Robert Spekkens Perimeter Institute for Theoretical Physics

January 17, 2013

PIRSA:13010076

High Energy Physics
12/13 PSI - String Theory Review Lecture 9

Barton Zwiebach Massachusetts Institute of Technology (MIT) - Department of Physics

January 17, 2013

PIRSA:13010057

High Energy Physics
12/13 PSI - Standard Model Review Lecture 9

Mark Wise California Institute of Technology (Caltech)

January 17, 2013

PIRSA:13010034

High Energy Physics

Title	Date	Collection	Type	Info
Pinning of Fermionic Occupation Numbers	2013‑01‑21	Perimeter Institute Quantum Discussions	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 11	2013‑01‑21	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 11	2013‑01‑21	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 11	2013‑01‑21	12/13 PSI - Standard Model Review	Course	View details
Indirect Searches for Dark Matter with the Fermi Large Area Telescope	2013‑01‑18	Particle Physics	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 10	2013‑01‑18	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 10	2013‑01‑18	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 10	2013‑01‑18	12/13 PSI - Standard Model Review	Course	View details
The black hole information paradox and its resolution	2013‑01‑17	Quantum Gravity	Scientific Series	View details
12/13 PSI - Found Quantum Mechanics Lecture 9	2013‑01‑17	12/13 PSI - Found Quantum Mechanics	Course	View details
12/13 PSI - String Theory Review Lecture 9	2013‑01‑17	12/13 PSI - String Theory Review	Course	View details
12/13 PSI - Standard Model Review Lecture 9	2013‑01‑17	12/13 PSI - Standard Model Review	Course	View details

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Format results

Pinning of Fermionic Occupation Numbers

12/13 PSI - Found Quantum Mechanics Lecture 11

12/13 PSI - String Theory Review Lecture 11

12/13 PSI - Standard Model Review Lecture 11

Indirect Searches for Dark Matter with the Fermi Large Area Telescope

12/13 PSI - Found Quantum Mechanics Lecture 10

12/13 PSI - String Theory Review Lecture 10

12/13 PSI - Standard Model Review Lecture 10

The black hole information paradox and its resolution

12/13 PSI - Found Quantum Mechanics Lecture 9

12/13 PSI - String Theory Review Lecture 9

12/13 PSI - Standard Model Review Lecture 9

Pinning of Fermionic Occupation Numbers

12/13 PSI - Found Quantum Mechanics Lecture 11

12/13 PSI - String Theory Review Lecture 11

12/13 PSI - Standard Model Review Lecture 11

Indirect Searches for Dark Matter with the Fermi Large Area Telescope

12/13 PSI - Found Quantum Mechanics Lecture 10

12/13 PSI - String Theory Review Lecture 10

12/13 PSI - Standard Model Review Lecture 10

The black hole information paradox and its resolution

12/13 PSI - Found Quantum Mechanics Lecture 9

12/13 PSI - String Theory Review Lecture 9

12/13 PSI - Standard Model Review Lecture 9