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Lorentz Invariance Violation searches with HESS

Julien Bolmont Sorbonne University

October 22, 2012

PIRSA:12100084
Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?
- Laurent Freidel Perimeter Institute for Theoretical Physics
- Stefano Liberati SISSA International School for Advanced Studies
- Dionigi Benincasa
October 22, 2012

PIRSA:12100082
General Relativity & Quantum Cosmology
The cosmological constant and the emergence of the continuum

Lorenzo Sindoni Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
October 22, 2012

PIRSA:12100081
Astrophysics
An analogue model lesson for the cosmological constant

Stefano Liberati SISSA International School for Advanced Studies
October 22, 2012

PIRSA:12100080
Astrophysics
Improved test of the Equivalence Principle as a probe of quantum gravity
- James Overduin Towson University
- Daniel Sudarsky Universidad Nacional Autónoma De Mexico (UNAM)
October 22, 2012

PIRSA:12100127
General Relativity & Quantum Cosmology
Quantum Field Theory - Lecture 10B

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 22, 2012

PIRSA:12100071
High Energy Physics
Condensed Matter - Lecture 10

Assa Auerbach Technion – Israel Institute of Technology
October 22, 2012

PIRSA:12100035
Condensed Matter
Matter-wave clocks

Holger Mueller University of California, Berkeley
October 22, 2012

PIRSA:12100124
General Relativity & Quantum Cosmology
Quantum Field Theory - Lecture 10A

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 22, 2012

PIRSA:12100017
High Energy Physics
Self-localization of a single hole in Mott antiferromagnets

Zheng-Yu Weng Tsinghua University
October 19, 2012

PIRSA:12100077
Condensed Matter
Quantum Field Theory - Lecture 9B

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 19, 2012

PIRSA:12100070
High Energy Physics
Condensed Matter - Lecture 9

Assa Auerbach Technion – Israel Institute of Technology
October 19, 2012

PIRSA:12100032
Condensed Matter

Lorentz Invariance Violation searches with HESS

Julien Bolmont Sorbonne University

October 22, 2012

PIRSA:12100084

The high flux and variability of the blazar PKS 2155-304 as observed by H.E.S.S. during the night of 28 July 2006 allowed a very high precision search for Quantum Gravity-induced energy-dependent time lags. In this talk, I will review the results published by the H.E.S.S. collaboration on this topic. In particular, I will emphasize the latest results obtained using a likelihood fit to study individual photon data. With this method and a proper error calibration procedure, a very high precision measurement was achieved leading to the best constraints on linear and quadratic terms of the dispersion relations obtained with an AGN so far.
Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?
- Laurent Freidel Perimeter Institute for Theoretical Physics
- Stefano Liberati SISSA International School for Advanced Studies
- Dionigi Benincasa
October 22, 2012

PIRSA:12100082
General Relativity & Quantum Cosmology
The cosmological constant and the emergence of the continuum

Lorenzo Sindoni Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
October 22, 2012

PIRSA:12100081
Astrophysics
Naturalness problems that could be signaling the necessity a completion of an effective field theory with the introduction of an otherwise overlooked ingredient. The cosmological constant problem can be seen as a signal that the EFT for gravity, general relativity, is not correctly including the gravitational properties of the vacuum. Starting from the discussion of the a possible solution to this naturalness problem for a cc-like term in a BEC analogue model, I will briefly discuss how this particular mechanism can be extended, albeit in a preliminary form, to more genuine quantum gravity models like GFT, connecting in particular the problem of the determination of the gravitational couplings (and hence the hierarchies involved) to the appearance of a semiclassical space-time
An analogue model lesson for the cosmological constant

Stefano Liberati SISSA International School for Advanced Studies
October 22, 2012

PIRSA:12100080
Astrophysics
Analogue models of gravity have been a test field for many phenomena in quantum field theory on curved spacetimes. It was recently recognized that in some situations they can also provide toy models of emergent gravity. We shall review here such a model and address within it the nature and scale of the cosmological constrant trying to draw general lessons for emergent gravity scenarios.
Improved test of the Equivalence Principle as a probe of quantum gravity
- James Overduin Towson University
- Daniel Sudarsky Universidad Nacional Autónoma De Mexico (UNAM)
October 22, 2012

PIRSA:12100127
General Relativity & Quantum Cosmology
Current approaches to the problems of dark energy and unification generically predict the existence of new fields (quintessence dilatons etc.) that will in principle couple with different strengths to different standard-model fields. These different coupling strengths will cause test materials of different compositions to fall at different rates in the same gravitational field violating the Equivalence Principle the foundation of General Relativity. A sufficiently sensitive measurement of the relative accelerations of different test bodies in orbit around the earth could detect or rule out these new fields complementing existing or proposed experiments in high-energy physics (colliders) and observational cosmology (space telescopes). To do this convincingly such an experiment needs at least three test materials spanning the largest possible volume in the space of atomic and molecular properties and a sensitivity to EP violations of as little as a part in $10^{18}$ (attainable only in space and at low temperatures). I discuss one such experiment the Satellite Test of the Equivalence Principle which has reached an advanced stage of prototype development and is currently awaiting a path toward a flight program.
Quantum Field Theory - Lecture 10B

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 22, 2012

PIRSA:12100071
High Energy Physics
Condensed Matter - Lecture 10

Assa Auerbach Technion – Israel Institute of Technology
October 22, 2012

PIRSA:12100035
Condensed Matter
Matter-wave clocks

Holger Mueller University of California, Berkeley
October 22, 2012

PIRSA:12100124
General Relativity & Quantum Cosmology
Quantum Field Theory - Lecture 10A

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 22, 2012

PIRSA:12100017
High Energy Physics
Self-localization of a single hole in Mott antiferromagnets

Zheng-Yu Weng Tsinghua University
October 19, 2012

PIRSA:12100077
Condensed Matter
Anderson localization - quantum suppression of carrier diffusion due to disorders - is a basic notion of modern condensed matter physics. Here I will talk about a novel localization phenomenon totally contrary to this common wisdom. Strikingly, it is purely of strong interaction origin and occurs without the assistance of disorders. Specifically, by combined numerical (density matrix renormalization group) method and analytic analysis, we show that a single hole injected in a quantum antiferromagnetic ladder is generally self-localized even though the system respects the translational symmetry. The localization length is found to monotonically decrease with the increase of leg number, indicating stronger self-localization in the two-dimensional limit. We find that a peculiar coupling between the doped charge and the quantum spin background causes quantum interference among different hole paths. The latter brings the hole's itinerant motion to a halt, a phenomenological analogy to Anderson localization. Our findings are opposite to the common belief of the quasiparticle picture for the doped hole and unveil a completely new paradigm for lightly doped Mott insulators.
Quantum Field Theory - Lecture 9B

Konstantin Zarembo Nordic Institute for Theoretical Physics
October 19, 2012

PIRSA:12100070
High Energy Physics
Condensed Matter - Lecture 9

Assa Auerbach Technion – Israel Institute of Technology
October 19, 2012

PIRSA:12100032
Condensed Matter

Title	Date	Collection	Type	Info
Lorentz Invariance Violation searches with HESS	2012‑10‑22	Experimental Search for Quantum Gravity 2012	Conference	View details
Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?	2012‑10‑22	Experimental Search for Quantum Gravity 2012	Conference	View details
The cosmological constant and the emergence of the continuum	2012‑10‑22	Experimental Search for Quantum Gravity 2007	Conference	View details
An analogue model lesson for the cosmological constant	2012‑10‑22	Experimental Search for Quantum Gravity 2007	Conference	View details
Improved test of the Equivalence Principle as a probe of quantum gravity	2012‑10‑22	Experimental Search for Quantum Gravity 2012	Conference	View details
Quantum Field Theory - Lecture 10B	2012‑10‑22	12/13 PSI - Quantum Field Theory 1	Course	View details
Condensed Matter - Lecture 10	2012‑10‑22	12/13 PSI - Condensed Matter	Course	View details
Matter-wave clocks	2012‑10‑22	Experimental Search for Quantum Gravity 2012	Conference	View details
Quantum Field Theory - Lecture 10A	2012‑10‑22	12/13 PSI - Quantum Field Theory 1	Course	View details
Self-localization of a single hole in Mott antiferromagnets	2012‑10‑19	Quantum Matter	Scientific Series	View details
Quantum Field Theory - Lecture 9B	2012‑10‑19	12/13 PSI - Quantum Field Theory 1	Course	View details
Condensed Matter - Lecture 9	2012‑10‑19	12/13 PSI - Condensed Matter	Course	View details

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Lorentz Invariance Violation searches with HESS

Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?

The cosmological constant and the emergence of the continuum

An analogue model lesson for the cosmological constant

Improved test of the Equivalence Principle as a probe of quantum gravity

Quantum Field Theory - Lecture 10B

Condensed Matter - Lecture 10

Matter-wave clocks

Quantum Field Theory - Lecture 10A

Self-localization of a single hole in Mott antiferromagnets

Quantum Field Theory - Lecture 9B

Condensed Matter - Lecture 9

Lorentz Invariance Violation searches with HESS

Is there a MesoScale in Quantum Gravity? Is it a Non-Locality Scale?

The cosmological constant and the emergence of the continuum

An analogue model lesson for the cosmological constant

Improved test of the Equivalence Principle as a probe of quantum gravity

Quantum Field Theory - Lecture 10B

Condensed Matter - Lecture 10

Matter-wave clocks

Quantum Field Theory - Lecture 10A

Self-localization of a single hole in Mott antiferromagnets

Quantum Field Theory - Lecture 9B

Condensed Matter - Lecture 9